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7 results on '"Raphaële Danoix"'

1. Interpreting the Presence of an Additional Oxide Layer in Analysis of Metal Oxides–Metal Interfaces in Atom Probe Tomography

Author

Mukesh Bachhav, Beatrice Hannoyer, Emmanuelle A. Marquis, Raphaële Danoix, Gorakh Pawar, Yan Dong, François Vurpillot, Frédéric Danoix, Idaho National Laboratory (INL), Groupe de physique des matériaux (GPM), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-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)-Institut de Recherche sur les Matériaux Avancés (IRMA), 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)-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)-Université de Caen Normandie (UNICAEN), 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), University of Michigan [Ann Arbor], University of Michigan System, Centre National de la Recherche Scientifique (CNRS)-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)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), and Normandie Université (NU)

Subjects
Materials science, Thin layer, Oxide, chemistry.chemical_element, 02 engineering and technology, Atom probe, 010402 general chemistry, 01 natural sciences, Oxygen, law.invention, Metal, chemistry.chemical_compound, law, Physical and Theoretical Chemistry, business.industry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, General Energy, chemistry, visual_art, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], visual_art.visual_art_medium, Optoelectronics, 0210 nano-technology, business, Layer (electronics)
Abstract

International audience; Atom Probe Tomography (APT) analysis of specimens embedded with metal oxide/metal leads to nonintuitive observations of a very thin layer of oxide at the interface due to oxygen migration under the influence of electric field in metal oxides. Detailed analyses of the FeO/Fe and ZrO2/ZrO interfaces are presented, explaining observation of the interfacial oxide layer with APT. These findings are relevant to the observation made for APT analysis of devices such as resistive switching, solar cells, oxides grown on metal/alloy during oxidation and corrosion wherein metal oxide is in interface with metallic layers. Because the APT technique is based on the application of an electric field on the oxide/metal interface, oxygen ions are driven toward the metal electrode and leads to a reaction with the metal and the formation of the additional interfacial oxide layer. Atomistic simulation performed on the FeO/Fe layer subjected to electric field confirms finding of oxygen migration from the oxide layer toward the oxide/metal interface.

Published
2018
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2. Contribution of Local Analysis Techniques for the Characterization of Iron and Alloying Elements in Nitrides: Consequences on the Precipitation Process in Fe⁻Si and Fe⁻Cr Nitrided Alloys

Author

Hugo P, Van Landeghem, Raphaële, Danoix, Mohamed, Gouné, Sylvie, Bordère, Andrius, Martinavičius, Peter, Jessner, Thierry, Epicier, Béatrice, Hannoyer, Frédéric, Danoix, and Abdelkrim, Redjaïmia

Subjects
clusters precipitation, APT and TEM characterization, excess nitrogen, Fe–Si and Fe–Cr nitrided alloys, Article
Abstract

Atom Probe Tomography (APT), Transmission Electron Microscopy (TEM), and 3D mechanical calculations in complex geometry and anisotropic strain fields were employed to study the role of minor elements in the precipitation process of silicon and chromium nitrides in nitrided Fe–Si and Fe–Cr alloys, respectively. In nitrided Fe–Si alloys, an original sequence of Si3N4 precipitation was highlighted. Al–N clusters form first and act as nucleation sites for amorphous Si3N4 nitrides. This novel example of particle-simulated nucleation opens a new way to control Si3N4 precipitation in Fe–Si alloys. In nitrided Fe–Cr alloys, both the presence of iron in chromium nitrides and excess nitrogen in the ferritic matrix are unquestionably proved. Only a certain part of the so-called excess nitrogen is shown to be explained by the elastic accommodation of the misfit between nitride and the ferritic matrix. The presence of immobile excess nitrogen trapped at interfaces can be highly suspected.

Published
2018

3. Mechanism of Si3N4 precipitation in nitrided Fe-Si alloys: A novel example of particle-stimulated-nucleation

Author

A. Redjaïmia, Raphaële Danoix, H.P. Van Landeghem, Frédéric Danoix, Mohamed Gouné, A. Martinavičius, Labex DAMAS, Université de Lorraine (UL), Groupe de physique des matériaux (GPM), Centre National de la Recherche Scientifique (CNRS)-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)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Institut Jean Lamour (IJL), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), ANR-11-LABX-0008,DAMAS,Design des Alliages Métalliques pour Allègement des Structures(2011), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-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)-Institut de Recherche sur les Matériaux Avancés (IRMA), 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)-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)-Université de Caen Normandie (UNICAEN), 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), and Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Silicon nitride, Nitriding Steel, Materials science, Silicon, Annealing (metallurgy), Alloy, Nucleation, chemistry.chemical_element, 02 engineering and technology, Atom probe, Precipitation, Nitride, engineering.material, law.invention, chemistry.chemical_compound, law, General Materials Science, 020502 materials, Mechanical Engineering, Metallurgy, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Atom probe tomography, 0205 materials engineering, chemistry, Chemical engineering, Mechanics of Materials, engineering, 0210 nano-technology, Nitriding
Abstract

International audience; Atom probe tomography (APT) was employed to investigate the precipitation process of Si3N4 particles after plasma assisted nitriding and subsequent annealing of Fe-Si alloy. The nitriding was done using 15N2 medium to enable quantitative analysis of Si and N by APT. Al, as a minor alloying element, is found to play an important role in the precipitation sequence. It is shown that Al forms Al-N clusters before Si3N4 precipitation takes place, and provides nucleation sites for the precipitation of Si3N4. Composition measurements show that silicon nitrides are enriched in Al, Ti and Mn as compared to the matrix.

Published
2017
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4. Field Evaporation Behavior of Metal Oxide/Metal Interfaces

Author

Raphaële Danoix, Frédéric Danoix, Emmanuelle A. Marquis, Beatrice Hannoyer, François Vurpillot, Mukesh Bachhav, University of Michigan [Ann Arbor], University of Michigan System, Groupe de physique des matériaux (GPM), Centre National de la Recherche Scientifique (CNRS)-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)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-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)-Institut de Recherche sur les Matériaux Avancés (IRMA), 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)-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)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), and Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0301 basic medicine, [PHYS]Physics [physics], Materials science, Field (physics), Oxide, 02 engineering and technology, 021001 nanoscience & nanotechnology, Evaporation (deposition), Metal, 03 medical and health sciences, chemistry.chemical_compound, 030104 developmental biology, chemistry, Chemical physics, visual_art, visual_art.visual_art_medium, 0210 nano-technology, Instrumentation, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016
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5. Atom probe tomography evidence of nitrogen excess in the matrix of nitrided Fe–Cr

Author

Mohamed Gouné, Frédéric Danoix, Beatrice Hannoyer, Raphaële Danoix, and P. Jessner

Subjects
Materials science, Metallurgy, Analytical chemistry, chemistry.chemical_element, Atom probe, Nitride, Condensed Matter Physics, Nitrogen, law.invention, Matrix (chemical analysis), chemistry.chemical_compound, chemistry, law, Nanometre, Solubility, Chromium nitride, Nitriding
Abstract

Excess nitrogen uptake is a key point in the understanding of nitriding process. The increased nitrogen solubility in the matrix of nitrided Fe–Cr alloys is recognised as one possible source of nitrogen excess, and investigated by means of atom probe tomography. The nitrogen concentration in the matrix of as-nitrided specimens, containing a high density of nanometre scale chromium nitride platelets, is measured significantly higher than the one in re annealed samples, and than in the calculated equilibrium values. These results bring direct experimental evidence that the additional amount of nitrogen dissolved in the matrix of nitrided alloys is a significant part of the so-called excess nitrogen.

Published
2010
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6. Investigation of O-18 enriched hematite (a-Fe2O3) by laser assisted atom probe tomography

Author

Mukesh Bachhav, Jean-Marc Bassat, Beatrice Hannoyer, Frédéric Danoix, Raphaële Danoix, Groupe de physique des matériaux (GPM), Centre National de la Recherche Scientifique (CNRS)-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)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-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)-Institut de Recherche sur les Matériaux Avancés (IRMA), 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)-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)-Université de Caen Normandie (UNICAEN), 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), and Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Dimer, Oxide, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, Atom probe, 01 natural sciences, Oxygen, Iron oxides, law.invention, Laser assisted atom probe tomography, chemistry.chemical_compound, law, 0103 physical sciences, Molecule, Physical and Theoretical Chemistry, Instrumentation, Spectroscopy, 010302 applied physics, Oxygen-18, Mass spectrometry, [CHIM.MATE]Chemical Sciences/Material chemistry, Hematite, 021001 nanoscience & nanotechnology, Condensed Matter Physics, chemistry, Isotopic measurements, visual_art, visual_art.visual_art_medium, 0210 nano-technology, Stoichiometry
Abstract

International audience; Quantitative composition measurements of metal-oxides by atom probe tomography (APT) face the problem of the nature of the oxygen peak at 16 Da. Due to a possible overlap between singly charged monomer (O+) and doubly charged dimer (O22+), the contribution of this peak to the total amount of oxygen in the analyzed samples is still matter of debate. In order to study this issue, laser assisted APT was used to analyze hematite (α-Fe2O3) samples containing large amounts of oxygen 18. Peak identification reveals that only singly charged monomers (O+) are detected, and that oxygen in detected water molecules does not originate from the oxide samples. With this information, composition of hematite measured by APT is found to be close, but not equal to the expected stoichiometry.

Published
2013
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7. Evidence of lateral heat transfer during laser assisted atom probe tomography analysis of large band gap materials

Author

Beatrice Hannoyer, Frédéric Danoix, Raphaële Danoix, Mukesh Bachhav, Satishchandra Ogale, and François Vurpillot

Subjects
Materials science, Physics and Astronomy (miscellaneous), medicine.diagnostic_test, Band gap, Far-infrared laser, Analytical chemistry, Atom probe, Thermal diffusivity, Laser, Molecular physics, law.invention, law, Heat transfer, medicine, Optical tomography, Absorption (electromagnetic radiation)
Abstract

Investigation of wustite (FeO), iron (Fe), and silicon (Si) specimens by infrared laser assisted three dimensional atom probe tomography shows evidence of confined surface absorption of the laser energy as the mechanism of laser assisted field evaporation for high band gap materials. The absorption region is shown to be located on the laser illumination side, close to the specimen apex. A simple model based on thermal diffusivity and spatial extent of the absorption region is derived and applied to the experimental results. The values of thermal diffusivity thus obtained are in good agreement with the published data.

Published
2011
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