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1. Radiation endurance in Al2O3 nanoceramics

Author

P. Trocellier, C. Baumier, Rosaria Brescia, Lucile Beck, Pasquale Vena, Luca Ceseracciu, F. García Ferré, A. Mairov, Dario Gastaldi, Marco Beghi, Kumar Sridharan, Yves Serruys, F. Di Fonzo, O. Kaïtasov, Service de recherches de métallurgie physique (SRMP), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre d'Energétique et de Thermique de Lyon (CETHIL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'ingénierie osteo-articulaire et dentaire (LIOAD), Université de Nantes (UN)-IFR26-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Oxide, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Article, law.invention, chemistry.chemical_compound, law, 0103 physical sciences, Radiation damage, Irradiation, Ceramic, Crystallization, Composite material, Thin film, nanoceramics, 010302 applied physics, Multidisciplinary, Radiation, 021001 nanoscience & nanotechnology, Grain growth, chemistry, visual_art, visual_art.visual_art_medium, 0210 nano-technology, Crystal twinning
Abstract

The lack of suitable materials solutions stands as a major challenge for the development of advanced nuclear systems. Most issues are related to the simultaneous action of high temperatures, corrosive environments and radiation damage. Oxide nanoceramics are a promising class of materials which may benefit from the radiation tolerance of nanomaterials and the chemical compatibility of ceramics with many highly corrosive environments. Here, using thin films as a model system, we provide new insights into the radiation tolerance of oxide nanoceramics exposed to increasing damage levels at 600 °C –namely 20, 40 and 150 displacements per atom. Specifically, we investigate the evolution of the structural features, the mechanical properties, and the response to impact loading of Al2O3 thin films. Initially, the thin films contain a homogeneous dispersion of nanocrystals in an amorphous matrix. Irradiation induces crystallization of the amorphous phase, followed by grain growth. Crystallization brings along an enhancement of hardness, while grain growth induces softening according to the Hall-Petch effect. During grain growth, the excess mechanical energy is dissipated by twinning. The main energy dissipation mechanisms available upon impact loading are lattice plasticity and localized amorphization. These mechanisms are available in the irradiated material, but not in the as-deposited films.

Published
2016

2. Metal-oxide nanoclusters in Fe–10%Cr alloy by ion implantation

Author

Frédérico Garrido, Vladimir A. Borodin, J. Ribis, A. Gentils, O. Kaïtasov, Ce Zheng, CSNSM PS2, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CSNSM PCI, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CSNSM SEMI, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Service des Recherches Métallurgiques Appliquées (SRMA), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
Nuclear and High Energy Physics, Materials science, Precipitation (chemistry), Analytical chemistry, Nucleation, Oxide, FeCr alloys, Thermal treatment, Crystal structure, Precipitation, Nanoclusters, Crystallography, chemistry.chemical_compound, Ion implantation, chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Aluminium oxide, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], High-resolution transmission electron microscopy, Instrumentation, Transmission electron microscopy
Abstract

International audience; High contents of Al+ and O+ ions were implanted sequentially into high purity Fe–10%Cr alloy thin foils at room temperature. The as-implanted foils were then studied by transmission electron microscopy (TEM) using the conventional TEM, energy dispersive X-ray (EDX), energy-filtered TEM (EFTEM) and high-resolution TEM (HRTEM) methods. In contrast to the conventional precipitate ensemble synthesis by implantation/annealing, the synthesis of clusters took place already at the implantation stage without requiring any subsequent thermal annealing in our case. The observed precipitates with diameters in the range of 3–25 nm were enriched in Al and O. The crystal lattice of precipitates corresponded to a cubic crystallographic structure of aluminium-rich oxide. The precipitate lattice alignment with the matrix was revealed for at least a part of precipitates. The early stage of nucleation outside thermal treatment is discussed in terms of point defect enhanced diffusion ensuring sufficient atomic transport to allow solute atom precipitation.

Published
2015

3. Application of multi-irradiation facilities

Author

Sandrine Miro, E. Bordas, M.O. Ruault, S. Pellegrino, Yves Serruys, S. Vaubaillon, S. Henry, P. Trocellier, O. Kaïtasov, Service de recherches de métallurgie physique (SRMP), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut National des Sciences et Techniques Nucléaires (INSTN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Ion beam analysis, Materials science, Radiation material science, Ion beam, Nuclear engineering, Physics::Medical Physics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, 7. Clean energy, 010305 fluids & plasmas, Characterization (materials science), Ion implantation, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Physics::Accelerator Physics, Stopping power (particle radiation), Neutron, Irradiation, Atomic physics, 0210 nano-technology, Instrumentation
Abstract

Multiple ion beam facilities have been used for nearly 30 years to simulate the irradiation effects of neutrons on relevant nuclear materials. Simultaneous ion beam irradiation allow the study of structural damage and foreign atoms accumulation in a broad range of parameters (projected range, temperature, dose rate, fluence, nuclear over electronic stopping power ratio) coupled with characterization of the investigated material. First, a review is given on the multi-irradiation facilities in operation worldwide. Then, the progress report of the Joint Accelerators for Nanosciences and NUclear Simulation project (JANNUS) is presented. In the third part of this paper, the main planned activity fields using JANNUS will be discussed i.e. the study of irradiation behaviour of nuclear materials, the controlled modification of materials properties by ion beam irradiation/implantation and the teaching of ion beam interactions with solids, ion beam physics and ion beam analysis.

Published
2008

4. Optics calculations and beam line design for the JANNuS facility in Orsay

Author

M.O. Ruault, P. Trocelier, S. Pellegrino, Nicolas Chauvin, Yves Serruys, Franck Fortuna, H. Flocard, S. Henry, P. Pariset, and O. Kaïtasov

Subjects
Physics, Nuclear and High Energy Physics, Ion beam analysis, Ion beam, business.industry, Transfer matrix, Ion, Ion implantation, Optics, Beamline, Physics::Accelerator Physics, Irradiation, business, Instrumentation, Beam (structure)
Abstract

JANNuS (Joint Accelerators for Nano-Science and Nuclear Simulation) will be a unique user facility in Europe dedicated to material modification by ion beam implantation and irradiation. The main originality of the project is that it will be possible to perform implantation and irradiation with simultaneous multiple ions beams and in situ characterization by transmission electron microscopy (TEM) observation or ion beam analysis. This facility will be composed of two experimental platforms located in two sites: the CEA-SRMP in Saclay and the CNRS-CSNSM in Orsay. This paper will focus on the design of two new transport beam lines for the Orsay site. One of the most challenging parts of the JANNuS project (Orsay site) is to design two new beam lines in order to inject, into a 200 kV TEM, two different ion beams (low and medium energy) coming from two existing pieces of equipment: a 2 MV Tandem accelerator and a 190 kV ion implanter. For these new beam lines, first order beam calculations have been done using transfer matrix formalism. A genetic algorithm has been written and adapted to perform the optimization of the beam line parameters. Then, using the SIMION code, field maps of the electrostatic elements (quadrupoles, spherical sectors) have been calculated and ion trajectories have been simulated. We studied specifically the optical aberrations induced by the electrostatic spherical deflectors. Finally, the results of the first order calculations and the field map simulations show a good agreement.

Published
2007

5. Secondary ion mass spectrometry depth profiling of 59Co implanted into nickel

Author

S Gautrot, M. Vayer, O. Kaïtasov, S Houdayer, C Tessier, Laetitia Vincent, J. Chaumont, and Thierry Sauvage

Subjects
Nuclear and High Energy Physics, Chemistry, Analytical chemistry, chemistry.chemical_element, Oxygen, Ion, Secondary ion mass spectrometry, Nickel, Low energy, Sputtering, Surface roughness, Atomic physics, Instrumentation, Cobalt
Abstract

Implantations of 59Co ions into nickel films at energies between 150 and 1000 keV have been performed. Cobalt depth profiles are measured by secondary ion mass spectrometry. The influence of oxygen flooding on the development of surface roughness has been studied in detail. Under the chosen measuring conditions, the mean sputtering rate is constant. Values of the most probable projected range have been extracted from the measured depth profiles and compared with SRIM calculations yielding a close agreement for the highest energies. However, it is found that SRIM underestimates the stopping power at low energy (E

Published
2003

6. Radiation-induced Ostwald ripening in oxide dispersion strengthened ferritic steels irradiated at high ion dose

Author

J. Ribis, E. Bordas, Yimeng Chen, Patrick Trocellier, A. Gentils, Yves Serruys, Alexandre Legris, M.-L. Lescoat, O. Kaïtasov, Emmanuelle A. Marquis, Y. de Carlan, Service des Recherches Métallurgiques Appliquées (SRMA), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, University of Michigan [Ann Arbor], University of Michigan System, Service de recherches de métallurgie physique (SRMP), CSNSM PS2, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CSNSM SEMI, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Unité Matériaux et Transformations - UMR 8207 (UMET), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), EMIR network, University of Michigan College of Engineering, CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), and Ribis, Joël

Subjects
Ostwald ripening, Materials science, Polymers and Plastics, Annealing (metallurgy), Materials Science, Oxide, 02 engineering and technology, Atom probe, 01 natural sciences, 7. Clean energy, Science des matériaux, law.invention, chemistry.chemical_compound, symbols.namesake, law, Phase stability, 0103 physical sciences, Irradiation, Composite material, Dissolution, 010302 applied physics, Atom-probe tomography, Metallurgy, Metals and Alloys, 021001 nanoscience & nanotechnology, Electronic, Optical and Magnetic Materials, chemistry, Creep, 13. Climate action, Ceramics and Composites, symbols, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ODS steels, 3-dimensional atom-probe, neutron-irradiation, ods steels, orientation relationships, stability, alloys, ma957, nanoclusters, particules, morphology, Particle size, 0210 nano-technology, Irradiation effect
Abstract

Oxide dispersion strengthened (ODS) ferritic steels are considered promising candidates as cladding tubes for Generation IV nuclear reactors. In such reactors, irradiation damage can reach more than 150 dpa at temperatures ranging from 400 to 650 degrees C. Thus nanopartide stability has to be guaranteed in order to ensure that these materials possess excellent creep properties. Using Fe ions, ODS steels were irradiated at 500 degrees C up to 150 dpa. At this temperature the nano-oxide population evolution under irradiation is similar to that observed after annealing at high temperature. It consists of a slight increase in the particle size and a slight decrease in the density, which can be both explained by an Ostwald ripening mechanism. Conversely, irradiations performed at room temperature using Au ions lead to a complete dissolution of the oxide particles, in agreement with the estimation of ballistic vs. radiation enhanced diffusion effects. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Published
2014

7. The feasibility of Al-based oxide precipitation in Fe-10%Cr alloy by ion implantation

Author

Dominique Mangelinck, Ce Zheng, A. Gentils, Marion Descoins, J. Ribis, Vladimir A. Borodin, O. Kaïtasov, CSNSM PS2, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Service des Recherches Métallurgiques Appliquées (SRMA), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CSNSM SEMI, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)

Subjects
Materials science, Annealing (metallurgy), Alloy, aluminium oxide, Oxide, Analytical chemistry, metals, 02 engineering and technology, Atom probe, engineering.material, alpha-iron, precipitation, 01 natural sciences, internal oxidation, law.invention, chemistry.chemical_compound, law, 0103 physical sciences, transmission electron microscopy, ion implatation, titanium, 010302 applied physics, particles, irradiation, Precipitation (chemistry), atom-probe tomography, Metallurgy, diffusion, aluminim, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Ion implantation, chemistry, Transmission electron microscopy, Aluminium oxide, engineering, steels, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], fe-cr alloys, 0210 nano-technology
Abstract

International audience; This paper reports the feasibility of nano-oxide precipitate formation in Fe-Cr alloy by ion implantation synthesis. High contents of Al+ and O+ ions were implanted into thin films of high purity Fe-10%Cr alloy at room temperature and were studied by transmission electron microscopy (TEM) and atom probe tomography (APT). In contrast, to the common two-stage implantation/annealing scheme of precipitate ensemble synthesis by ion beams, cluster formation took place at the implantation stage in our study, requiring no subsequent high-temperature annealing. The post-implantation microstructural examination revealed in the as-implanted thin foil an array of precipitates with diameters in the range of 3-30 nm. The precipitate number density distribution was found to depend on the foil thickness. The precipitate enrichment with both Al and O was confirmed by the energy-filtered TEM analysis. Judging from the electron diffraction pattern and high-resolution TEM analysis, the crystal lattice of precipitates corresponds to some cubic modification of aluminium-rich oxide or pure aluminium oxide. The precipitate lattice alignment with the host matrix was revealed for at least a part of precipitates. The analysis of APT data using cluster detection algorithm indicates the presence of local zones enriched in Al and O, even in those areas of as-implanted samples where no clusters were visible by TEM.

Published
2014

8. Simulation of the α-annealing effect in apatitic structures by He-ion irradiation: Influence of the silicate/phosphate ratio and of the OH−/F− substitution

Author

O. Kaïtasov, J. C. Krupa, M.O. Ruault, Stéphane Soulet, J. Chaumont, and Joëlle Carpéna

Subjects
Nuclear and High Energy Physics, Materials science, Annealing (metallurgy), Inorganic chemistry, Fluorapatite, Actinide, Phosphate, Apatite, Ion, chemistry.chemical_compound, Ion implantation, chemistry, visual_art, visual_art.visual_art_medium, Irradiation, Instrumentation, Nuclear chemistry
Abstract

In fluoroapatite, the α-annealing is a crystal recovery process due to the electronic energy loss of α-particles emitted by radionuclides. This effect, which can be accompanied by a thermal recovery, is accounting for the crystalline state of natural calcium phosphate apatites containing long lifetime actinide isotopes. The aim of the present study is to determine the influence of the silicate–phosphate grouping substitution, on the α-annealing efficiency. In addition, measurements have been performed on hydroxyapatite Ca10(PO4)6(OH)2 and compared with those obtained on fluoroapatite Ca10(PO4)6F2 to evaluate the influence of the OH−/F− substitution on the annealing efficiency. Using a transmission electron microscope (TEM) on line with an ion implanter, the main result obtained in this study is that α-annealing is strongly dependent on the chemical composition of the mineral. Our results show that this effect is decreasing when the SiO4/PO4 ratio increases and when F− is substituted for OH− anions.

Published
2001

9. An in situ TEM study of the evolution of Xe bubble populations in UO2

Author

A. Michel, C. Sabathier, Philippe Garcia, G. Carlot, O. Kaïtasov, Carole Valot, S. Bouffard, Laboratoire de Modélisation Multi-échelles des Combustibles (LM2C), Service d'Etudes de Simulation du Comportement du combustibles (SESC), Département d'Etudes des Combustibles (DEC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Département d'Etudes des Combustibles (DEC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CSNSM SEMI, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), and Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Xenon, URANIUM-DIOXIDE, FUELS, Population, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, Precipitation, UO2, Mass spectrometry, 01 natural sciences, Fluence, Ion, 0103 physical sciences, Irradiation, education, Instrumentation, 010302 applied physics, education.field_of_study, Number density, Radiochemistry, FISSION-GAS BUBBLES, 021001 nanoscience & nanotechnology, HIGH-RESOLUTION TEM, chemistry, Transmission electron microscopy, TEM, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], BURNUP, Defects, 0210 nano-technology
Abstract

International audience; Transmission electron microscopy (TEM) experiments were carried out on the JANNUS platform (Joint Accelerators for Nano-science and NUclear Simulation) at CSNSM (Center of Nuclear Spectrometry and Mass Spectrometry) laboratory in Orsay. The experiment was devoted to the study of the evolution of the xenon aggregate population with increasing implantation fluence. A thin UO2 foil was implanted at fluences ranging from 3 x 10(12) to 7 x 10(14) at cm(-2) with 390 key Xe3+ ions at an irradiation temperature of 873 K. The TEM results indicate the presence of nanometer size bubbles above a fluence of 6 x 10(12) Xe cm(-2) and an increase in the bubble number density was observed between 6 x 10(12) Xe cm(-2) and 2 x 10(14) Xe cm(-2). Above 2 x 10(14) Xe cm(-2), the number density levels off at 4 x 10(23) +/- 0.5 x 10(23) m(-3). (C) 2011 Elsevier B.V. All rights reserved.

Published
2012

10. In situ study of in-beam cobalt suicide growth in silicon

Author

M-O Ruault, O. Kaïtasov, F. Fortuna, and Harry Bernas

Subjects
Ostwald ripening, Nuclear and High Energy Physics, Materials science, Silicon, Precipitation (chemistry), Annealing (metallurgy), Analytical chemistry, chemistry.chemical_element, Fluence, Crystallography, symbols.namesake, chemistry, symbols, Growth rate, Instrumentation, Cobalt, Stoichiometry
Abstract

The control of buried suicide layer interfaces requires a systematic study of their formation conditions (implantation temperature, sample orientation, post-annealing conditions). At stoichiometric concentration, the layer roughness stems from the formation and overlap of B-type precipitates during implanted sample annealing. However, at such high concentrations several parameters interfere during suicide layer formation, particularly diffusion-limited precipitate growth and precipitate coalescence and Ostwald ripening. In order to analyze these factors separately, we have performed an in situ TEM study of the initial stages of CoSi2 precipitate formation and growth in Si during 50 keV Co implantation to fluences between 1015 and 1.5 × 1016 Cocm−2, at temperatures between 350 and 650°C. At 350°C, the threshold fluence for suicide precipitate observation was 2 × 1015 Cocm−2, and the size of the precipitates remained constant (about 4 nm) up to a fluence of 1.5 × 1016 Cocm−2. At higher implantation temperatures, the average growth rate at 650°C is four times higher than at 500°C until the average size of the precipitates reaches ~ 8 nm. Then the growth rate is surprisingly independent of the implantation temperature. The results are discussed in the light of a recently developed precipitation kinetic analysis.

Published
1994

11. In-situ TEM study of the stability of nano-oxides in ODS steels under ion-irradiation

Author

Y. de Carlan, Alexandre Legris, A. Gentils, M.-L. Lescoat, J. Ribis, O. Kaïtasov, Service des Recherches Métallurgiques Appliquées (SRMA), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CSNSM PS2, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CSNSM SEMI, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Unité Matériaux et Transformations - UMR 8207 (UMET), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut National de la Recherche Agronomique (INRA), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), AREVA Nuclear Power, EDF, Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Materials science, Oxide, 02 engineering and technology, 01 natural sciences, DISPERSION-STRENGTHENED STEEL, Nanoclusters, [SPI.MAT]Engineering Sciences [physics]/Materials, chemistry.chemical_compound, 0103 physical sciences, Nano, PARTICLES, General Materials Science, Irradiation, 010302 applied physics, Metallurgy, FERRITIC ALLOYS, NANOCLUSTERS, 021001 nanoscience & nanotechnology, Microstructure, Dark field microscopy, Crystallographic defect, Nuclear Energy and Engineering, chemistry, HIGH-TEMPERATURE, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology, Dispersion (chemistry)
Abstract

Oxide Dispersion Strengthened (ODS) ferritic–martensitic steels are considered for nuclear applications as structural components for fusion or fission reactors. To ensure good performances in service, the stability under irradiation of the microstructure and especially of Y–Ti–O nanoclusters have to be assessed. In situ Transmission Electron Microscopy has been performed to follow the Y–Ti–O nano-oxides dispersed in a Fe18Cr1W0.3Ti + 0.6Y2O3 ODS material under ion-irradiation at 500 °C. Microstructural examinations using bright and dark field mode showed that Y–Ti–O nano-precipitates (5 nm) are still present after irradiation up to 45 dpa. However, some larger oxides seem to be more affected by irradiation at 45 dpa (creation of point defects, interface and shape modification).

Published
2011

12. Synthesis of mesoporous amorphous silica by Kr and Xe ion implantation: Transmission electron microscopy study of induced nanostructures

Author

Sophie Collin, F. Fotuna, M.O. Ruault, Erwan Oliviero, Esidor Ntsoenzok, O. Kaïtasov, B. Décamps, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), and Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Oxide, Nucleation, Mineralogy, 02 engineering and technology, 01 natural sciences, Ion, Nanoclusters, [SPI.MAT]Engineering Sciences [physics]/Materials, chemistry.chemical_compound, Condensed Matter::Materials Science, 0103 physical sciences, General Materials Science, Noble gas implantation, 010302 applied physics, Coalescence (physics), General Chemistry, Cavities, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Amorphous solid, Ion implantation, Structural investigation, chemistry, Mechanics of Materials, Transmission electron microscopy, Chemical physics, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Bubbles, 0210 nano-technology, Mesoporous silica
Abstract

Thermally grown amorphous SiO2 was implanted at room temperature with heavy noble gases Kr and Xe in order to create cavities in the oxide and increase its porosity. The implantation energies were chosen in order to have the same implantation depth for both ions. Although both ions induce bubbles in amorphous SiO2, bubble size and spatial distribution depend upon the ion mass. Moreover, Xe implantation leads to the additional formation of "nanoclusters". Thermal stability of bubbles/cavities depends on the implanted ion. The nucleation of bubbles and nanoclusters in amorphous SiO2 is discussed in terms of ion mobility, gas-defect interactions, and chemical interaction. Bubble growth is shown to occur by a migration and coalescence process.

Published
2010

13. Progress report on Aramis, the 2 MV tandem at Orsay

Author

D. Le Du, G. Moroy, J. Chaumont, O. Kaïtasov, Robert Meunier, C. Clerc, Murielle Salomé, E. Cottereau, Harry Bernas, Agnès Traverse, F. Lalu, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
010506 paleontology, Nuclear and High Energy Physics, High energy, Materials science, Tandem, business.industry, 02 engineering and technology, Tandem accelerator, 021001 nanoscience & nanotechnology, 01 natural sciences, law.invention, Ion, Beamline, law, Van de Graaff generator, Optoelectronics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Atomic physics, 0210 nano-technology, business, Instrumentation, Beam (structure), 0105 earth and related environmental sciences
Abstract

Aramis is a home built multipurpose 2 MV electrostatic tandem accelerator. A large variety of ions are available for high energy implantation. Characterization possibilities are also quite large in the Van de Graaff mode owing to the Penning positive ion source in the terminal. A second beam line is now available that sends the beam into the target chamber of the 200 kV medium current implanter. We will provide a progress report on the machine and present some results regarding in situ studies of multilayer mixing and implanted silicide layers

Published
1992

14. JANNUS: experimental validation at the scale of atomic modelling

Author

O. Kaïtasov, Patrick Trocellier, M.O. Ruault, Alain Barbu, Philippe Trouslard, S. Pellegrino, Sylvain Henry, Yves Serruys, Olivier Leseigneur, Sandrine Miro, Loïc Boulanger, S. Vaubaillon, CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CSNSM PS2, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CSNSM SEMI, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences et Techniques Nucléaires (INSTN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Nuclear reaction, Energy Engineering and Power Technology, 02 engineering and technology, 01 natural sciences, 7. Clean energy, 010305 fluids & plasmas, law.invention, Nuclear physics, ENERGY, law, 0103 physical sciences, Van de Graaff generator, Neutron, FACILITY, Irradiation, VANADIUM, Physics, DAMAGE, General Engineering, 021001 nanoscience & nanotechnology, Neutron temperature, Ion source, ION-BEAM IRRADIATION, Pelletron, Ion implantation, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], IN-SITU OBSERVATION, Atomic physics, 0210 nano-technology
Abstract

Ion irradiation is well suited to simulate neutron irradiation because primary knock-on atoms (PKA) produced by neutron collisions are self ions of the target. As the main difference, the energy spectrum of ion-produced PKAs is somewhat broader than in the case of fast neutrons. Studies of the combined effects of target damaging, ion implantation effects, helium and hydrogen production, and the occurrence of nuclear reactions should be performed by co-irradiation experiments (dual or triple beam irradiation). The JANNUS project (Joint Accelerators for Nanosciences and NUclear Simulation) was started in 2002 in the frame of a collaboration between CEA (Commissariat a l'Energie Atomique) and CNRS-IN2P3 (Centre National de la Recherche Scientifique-Institut National de Physique Nucleaire et de Physique des Particules). Two experimental sites are involved. At Saclay, three electrostatic accelerators are being coupled: a new 3 MV Pelletron (TM) machine equipped with an ECR multi-charged ion source, a 2.5 MV single ended Van de Graaff and a 2.25 MV General Ionex tandem. At Orsay, the 2 MV tandem ARAMIS and the 190 kV ion implanter IRMA are being coupled with a 200 kV TECNAI (TM) transmission electron microscope to allow simultaneous co-irradiation and observation. This paper will first discuss both advantages and limitations of the use of ion beam irradiation to simulate neutron irradiation. A technical description of both set-ups is then presented, and some details will be given concerning multi-irradiation facilities running worldwide. The main application fields of JANNUS will be further detailed.

Published
2008

15. Thermal behaviour of cesium implanted in cubic zirconia

Author

O. Kaïtasov, Lionel Thomé, Laetitia Vincent, F. Garrido, CSNSM PCI, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CSNSM SEMI

Subjects
010302 applied physics, Nuclear and High Energy Physics, Chemistry, Annealing (metallurgy), INERT MATRIX FUEL, ION-IMPLANTATION, Analytical chemistry, Recrystallization (metallurgy), 02 engineering and technology, 021001 nanoscience & nanotechnology, Rutherford backscattering spectrometry, 01 natural sciences, Zirconate, PRODUCTS, Ion implantation, Nuclear Energy and Engineering, Transmission electron microscopy, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], General Materials Science, Cubic zirconia, 0210 nano-technology, Yttria-stabilized zirconia
Abstract

International audience; Cesium ions were implanted at the energy of 300 keV in YSZ at 300 and 1025 K, with increasing fluences up to 5 x 10(16) cm(-2). Concentration profiles were determined by Rutherford Backscattering Spectrometry (RBS) measurements. Transmission Electron Microscopy (TEM) experiments were achieved to determine the nature of the damages and to characterize a predicted ternary phase of cesium zirconate. At 300 K, amorphization occurs at high Cs-concentration (9 at.%) due to a chemical effect. TEM investigations performed after in situ post-annealing shows the recrystallization of YSZ concurrently with the cesium release. No precipitation of secondary phases was observed after annealing. With implantation performed at 1025 K, dislocation loops and bubbles were formed but the structure did not undergo amorphization. Dislocation rearrangement leads to the polygonization of the matrix. The cesium concentration reaches a saturation value of 1.5 at.%, and once more no precipitation is observed. (c) 2008 Elsevier B.V. All rights reserved.

Published
2008

16. JANNUS: A multi-irradiation platform for experimental validation at the scale of the atomistic modelling

Author

S. Henry, Didier Uriot, Sandrine Miro, S. Vaubaillon, Th. Bonnaillie, Yves Serruys, S. Pellegrino, O. Leseigneur, O. Kaïtasov, M.-O. Ruault, P. Trocellier, E. Bordas, Service de recherches de métallurgie physique (SRMP), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre d'Etude de Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Nuclear engineering, ION-IMPLANTATION, 02 engineering and technology, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, Van de Graaff generator, General Materials Science, FACILITY, Irradiation, 010302 applied physics, Physics, DAMAGE, Tandem, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Nuclear reactor, Fusion power, 021001 nanoscience & nanotechnology, Ion source, Pelletron, Ion implantation, Nuclear Energy and Engineering, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], BOMBARDMENT, 0210 nano-technology, BEAM IRRADIATION, HELIUM
Abstract

International audience; The joint Accelerators for Nanosciences and NUclear Simulation project was started in 2002 in the frame of collaboration between CEA and CNRS. Due to the scientific skills developed for a long time, two experimental sites have been considered: (1) at Saclay, three electrostatic accelerators are being coupled, a new 3 MV Pelletron machine equipped with a multi-charged ion source, a 2.5 MV single ended Van de Graaff and a 2.25 MV tandem and (2) at Orsay, a 2 MV tandem and a 190 kV ion implanter are being coupled together with a 200 kV transmission electron microscope to allow simultaneous co-irradiation and observation. A brief review is first presented on multi-irradiation facilities available in the world. Then, a technical description of the new experimental facilities being installed is given. The main experiments we intend to carry out using mono, dual or triple irradiation configurations in different nuclear application fields and especially in the fusion domain will be further presented. (C) 2009 Elsevier B.V. All rights reserved.

Published
2007

18. In situ transmission electron microscopy ion irradiation studies at Orsay

Author

O. Kaïtasov, M.-O. Ruault, J. Chaumont, H. Bernas, Vladimir A. Borodin, F. Fortuna, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Ian M. Robertson, Mark Kirk, Ulrich Messerschmidt, Judith Yang, and Robert Hull

Subjects
In situ, 010506 paleontology, Materials science, Ion beam, Mechanical Engineering, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, 01 natural sciences, Ion, Mechanics of Materials, Transmission electron microscopy, Atom, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], General Materials Science, Irradiation, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Atomic physics, 0210 nano-technology, 0105 earth and related environmental sciences, Line (formation)
Abstract

Crucial features of materials evolution due to ion beam irradiation are often revealed only through studies of process dynamics. We review some significant examples of such experiments performed over the last 25 years with the Orsay in situ facility: a transmission electron microscope setup (with temperature stages operating between 4 and 1000 K) on a medium energy (3–570 keV) ion beam line. New results on nanocavity evolution and metal silicide nanoprecipitates in Si are presented briefly.We show that CoSi2 nanoprecipitate growth is mainly due to the constant Co atom contribution from the ion beam, and CoSi2 platelet growth is the result of a three-dimensional to two-dimensional growth mode transition.

Published
2005

19. Multiple ion beam irradiation and implantation: JANNUS project

Author

Ph. Trouslard, P. Trocellier, Yves Serruys, O. Kaïtasov, M.O. Ruault, S. Henry, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), J.-C. Dran and T. Calligaro, and JANNUS

Subjects
Nuclear and High Energy Physics, Ion beam, Chemistry, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 021001 nanoscience & nanotechnology, 01 natural sciences, 7. Clean energy, 010305 fluids & plasmas, Ion, Nuclear physics, Ion beam irradiation, Radiation damage, Ion accelerators, 0103 physical sciences, IBMM, TEM, Irradiation, IBA, 0210 nano-technology, Instrumentation, 61.80.−x, 61.72.Cc, 81.40.Wx
Abstract

JANNUS (Joint Accelerators for Nano-Science and Nuclear Simulation) is a project designed to study the modification of materials using multiple ion beams and in-situ TEM observation. It will be a unique facility in Europe for the study of irradiation effects and ion beam modification of materials, the simulation of damage due to irradiation and in particular of combined effects. The project is also intended to bring together experimental and modelling teams for a mutual fertilisation of their activities. It will also contribute to the teaching of particle-matter interactions and their applications. JANNUS will be composed of three accelerators with a common experimental chamber and of two accelerators coupled to a TEM.

Published
2004

20. Materials Modification Under Ion Irradiation : JANNUS Project

Author

M.O. Ruault, Yves Serruys, O. Kaïtasov, S. Henry, P. Trocellier, and Ph. Trouslard

Subjects
Nuclear physics, Physics, Radiation material science, law, Nuclear engineering, Particle accelerator, Irradiation, Ion, law.invention
Abstract

JANNUS (Joint Accelerators for Nano‐Science and Nuclear Simulation) is a project designed to study the modification of materials using multiple ion beams and in‐situ TEM observation. It will be a unique facility in Europe for the study of irradiation effects, the simulation of material damage due to irradiation and in particular of combined effects. The project is also intended to bring together experimental and modelling teams for a mutual fertilisation of their activities. It will also contribute to the teaching of particle‐matter interactions and their applications. JANNUS will be composed of three accelerators with a common experimental chamber and of two accelerators coupled to a 200 kV TEM.

Published
2004

21. Ellipsometric studies of annealing of SiO$_2$ layers during the formation of light-emitting Si nanocrystals in them

Author

O. Kaïtasov, T. Khasanov, A. S. Mardezhov, G. A. Kachurin, S. G. Yanovskaya, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
010302 applied physics, Materials science, Photoluminescence, business.industry, Annealing (metallurgy), Atmospheric temperature range, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, 010309 optics, Optics, Ion implantation, law, Ellipsometry, 0103 physical sciences, Optoelectronics, Nitrogen laser, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], business, Refractive index
Abstract

Annealing of SiO2 layers with excessive Si leading to the formation of silicon nanocrystals capable of fluorescing in the visible region owing to quantum-dimensional limitations is studied by the ellipsometry method. Excessive Si was introduced in SiO2 layers by ion implantation with an energy of 25 keV and a dose of 5× 1016 cm−2. Isochronous (103 s) annealings were carried out in a temperature interval of 200–1150°C with a step of 100°C. An LEF-2 ellipsometer with a 70° angle of incidence at a wavelength of 632.8 nm was used for the measurements. Fluorescence excited by a nitrogen laser was monitored concurrently. It is found that variations in optical constants of the layers at each step of annealing over the entire temperature range studied are clearly detected by ellipsometry. Variations in optical parameters of excessive Si are calculated in the Bruggeman approximation. They are found to correspond to individual stages of the formation of nanoprecipitates revealed earlier by other techniques. Nanocrystals proper producing intense visible photoluminescence are formed at annealing temperatures of 1000°C and higher.

Published
2001

22. The influence of irradiation and subsequent annealing on Si nanocrystals formed in SiO$_2$ layers

Author

K. S. Zhuravlev, Harry Bernas, G. A. Kachurin, M.O. Ruault, Anton K. Gutakovskii, O. Kaïtasov, S. G. Yanovskaya, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
010302 applied physics, Photoluminescence, Materials science, Annealing (metallurgy), Analytical chemistry, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Crystallographic defect, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Ion, Crystallography, Nanocrystal, law, 0103 physical sciences, Irradiation, Electron microscope, 0210 nano-technology, Luminescence
Abstract

Luminescent Si nanocrystals formed in SiO2 layers were irradiated with electrons and He+ ions with energies of 400 and 25–130 keV, respectively. The effects of irradiation and subsequent annealing at 600–1000°C were studied by the methods of photoluminescence and electron microscopy. After irradiation with low doses (∼1 displacement per nanocrystal), it was found that photoluminescence of nanocrystals was quenched but the number of them increased simultaneously. After irradiation with high doses (∼103 displacements per nanocrystal), amorphization was observed, which is not characteristic of bulk Si. The observed phenomena are explained in terms of the generation of point defects and their trapping by Si-SiO2 interfaces. Photoluminescence of nanocrystals is recovered at annealing temperatures below 800°C; however, an annealing temperature of about 1000°C is required to crystallize the precipitates. An enhancement of photoluminescence observed after annealing is explained by the fact that the intensities of photoluminescence originated from initial nanocrystals and from nanocrystals formed as a result irradiation are summed.

Published
2000

23. Ion beam induced magnetic nanostructure patterning

Author

J. Ferré, V. Kottler, Thibaut Devolder, H. Launois, Christophe Vieu, S Lemerle, F. Rousseaux, V. Mathet, Edmond Cambril, O. Kaïtasov, J. P. Jamet, Harry Bernas, C Chappert, Yong Chen, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Lorgeril, Jocelyne

Subjects
010302 applied physics, Nuclear and High Energy Physics, Materials science, Condensed matter physics, Ion beam mixing, Magnetic domain, 02 engineering and technology, Coercivity, 021001 nanoscience & nanotechnology, 01 natural sciences, Magnetic susceptibility, Magnetic anisotropy, Paramagnetism, 0103 physical sciences, Magnetic force microscope, 0210 nano-technology, Instrumentation, Micromagnetics
Abstract

Using results from previous work on the initial stages of ion beam mixing in metallic multilayers, we developed a method allowing us to pattern the magnetic properties of Pt/Co thin film sandwiches and multilayers without affecting their optical or topographical properties. Excellent control of local coercivity or magnetic anisotropy is obtained in the irradiated areas. We produced arrays of 1 μm wide stripes with perpendicular magnetic anisotropy, separated by 1 μm wide paramagnetic stripes, and studied domain wall motion in these structures. Calculations show that nanometer scale resolution can be achieved. Besides its interest for micromagnetics studies, the technique holds promise for applications in high density magnetic recording and magnetic sensor technologies.

Published
1998

24. Light particle irradiation effects in Si nanocrystals

Author

M.O. Ruault, S. G. Yanovskaya, Harry Bernas, K. S. Zhuravlev, A.K. Gutakovsky, O. Kaïtasov, G. A. Kachurin, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Lorgeril, Jocelyne

Subjects
010302 applied physics, Nuclear and High Energy Physics, Materials science, Photoluminescence, Annealing (metallurgy), Analytical chemistry, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, law.invention, Ion, Ion implantation, Nanocrystal, law, Transmission electron microscopy, 0103 physical sciences, Irradiation, Electron microscope, Atomic physics, 0210 nano-technology, Instrumentation
Abstract

Si nanocrystals, formed by Si ion implantation into SiO 2 layers and subsequent annealing at 1150°C, were irradiated at room temperature either with He + ions at energies of 30 or 130 keV, or with 400 keV electrons. Transmission electron microscopy (TEM) and photoluminescence (PL) studies were performed. TEM experiments revealed that the Si nanocrystals were ultimately amorphized (for example at ion doses ∼10 16 He cm −2 ) and could not be recrystallized by annealing up to 775°C. This contrasts with previous results on bulk Si, in which electron- and very light ion-irradiation never led to amorphization. Visible photoluminescence, usually ascribed to quantum-size effects in the Si nanocrystals, was found to decrease and vanish after He + ion doses as low as 3 × 10 12 –3 × 10 13 He cm −2 (which produce about 1 displacement per nanocrystal). This PL decrease is due to defect-induced non-radiative recombination centers, possibly situated at the Si nanocrystal/SiO 2 interface, and the pre-irradiation PL is restored by a 600°C anneal.

Published
1998

25. Radiation endurance in Al 2 O 3 nanoceramics.

Author

García Ferré F, Mairov A, Ceseracciu L, Serruys Y, Trocellier P, Baumier C, Kaïtasov O, Brescia R, Gastaldi D, Vena P, Beghi MG, Beck L, Sridharan K, and Di Fonzo F

Abstract

The lack of suitable materials solutions stands as a major challenge for the development of advanced nuclear systems. Most issues are related to the simultaneous action of high temperatures, corrosive environments and radiation damage. Oxide nanoceramics are a promising class of materials which may benefit from the radiation tolerance of nanomaterials and the chemical compatibility of ceramics with many highly corrosive environments. Here, using thin films as a model system, we provide new insights into the radiation tolerance of oxide nanoceramics exposed to increasing damage levels at 600 °C -namely 20, 40 and 150 displacements per atom. Specifically, we investigate the evolution of the structural features, the mechanical properties, and the response to impact loading of Al 2 O 3 thin films. Initially, the thin films contain a homogeneous dispersion of nanocrystals in an amorphous matrix. Irradiation induces crystallization of the amorphous phase, followed by grain growth. Crystallization brings along an enhancement of hardness, while grain growth induces softening according to the Hall-Petch effect. During grain growth, the excess mechanical energy is dissipated by twinning. The main energy dissipation mechanisms available upon impact loading are lattice plasticity and localized amorphization. These mechanisms are available in the irradiated material, but not in the as-deposited films.

Published
2016
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26. Sr diffusion in undoped and La-doped SrTiO3 single crystals under oxidizing conditions.

Author

Gömann K, Borchardt G, Schulz M, Gömann A, Maus-Friedrichs W, Lesage B, Kaïtasov O, Hoffmann-Eifert S, and Schneller T

Abstract

Strontium titanate SrTiO3(100), (110), and (111) single crystals, undoped or donor doped with up to 1 at% La, were isothermally equilibrated at temperatures between 1523 and 1773 K in synthetic air followed by two different methods of Sr tracer deposition: ion implantation of 87Sr and chemical solution deposition of a thin 86SrTiO3 layer. Subsequently, the samples were diffusion annealed under the same conditions as before. The initial and final depth profiles were measured by SIMS. For strong La-doping both tracer deposition methods yield similar Sr diffusion coefficients, whereas for weak doping the tracer seems to be immobile in the case of ion implantation. The Sr diffusivity does not depend on the crystal orientation, but shows strong dependency on the dopant concentration supporting the defect chemical model that under oxidizing conditions the donor is compensated by Sr vacancies. A comparison with literature data on Sr vacancy, Ti, and La diffusion in this system confirms the concept that all cations move via Sr vacancies. Cation diffusion is several orders of magnitude slower than oxygen diffusion.

Published
2005
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