1. Damage processes in MgO irradiated with medium-energy heavy ions
- Author
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Aurélien Debelle, Sandra Moll, William J. Weber, Jacek Jagielski, Lionel Thomé, Yanwen Zhang, Jean-Paul Crocombette, Z. Zihua, 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), Department of Mechanical and Aerospace Engineering [Princeton] (MAE), Princeton University, 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), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institute of Electronic Materials Technology (IEMT), Institute of Electronic Materials Technology, Pacific Northwest National Laboratory (PNNL), 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
Materials science ,[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] ,Polymers and Plastics ,Metals and Alloys ,Analytical chemistry ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Rutherford backscattering spectrometry ,Electronic, Optical and Magnetic Materials ,Ion ,Secondary ion mass spectrometry ,Transmission electron microscopy ,Nuclear reaction analysis ,Ceramics and Composites ,Cubic zirconia ,Irradiation ,Atomic physics ,medium-energy ,Yttria-stabilized zirconia - Abstract
International audience; The micro-structural modifications produced in MgO single crystals exposed to medium-energy heavy ions (1.2-MeV Au) were investigated using Rutherford backscattering spectrometry in channeling geometry coupled to Monte-Carlo analyses, secondary ion mass spectrometry, X-ray diffraction and transmission electron microscopy. The damage accumulation and the elastic strain variation were interpreted in the framework of the multi-step damage accumulation (MSDA) model. Both build-ups follow a multi-step process similar to that recently observed for ion-irradiated yttria-stabilized zirconia (YSZ) single crystals. However, in MgO, an unexpectedly high disorder level occurs far beyond the theoretical damage distribution. These results strongly suggest that the migration of defects created in the near-surface layer is most likely at the origin of the broadening of the damage depth distribution in MgO.
- Published
- 2015
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