A5073607938- Fusion materials and technologies
- Nuclear Materials and Properties
- Ion-surface interactions and analysis
- Microstructure and mechanical properties
- Theoretical and Computational Physics
- Nuclear materials and radiation effects
- nanoparticles nucleation surface interactions
- Magnetic Properties and Applications
- Magnetic properties of thin films
- Advanced Materials Characterization Techniques
- High Temperature Alloys and Creep
- Nuclear reactor physics and engineering
- Semiconductor materials and devices
- Hydrogen embrittlement and corrosion behaviors in metals
- Microstructure and Mechanical Properties of Steels
- Advanced Chemical Physics Studies
- Numerical methods in engineering
- thermodynamics and calorimetric analyses
- High-Temperature Coating Behaviors
- Catalytic Processes in Materials Science
- High Entropy Alloys Studies
- Spectroscopy and Quantum Chemical Studies
- Nuclear Physics and Applications
- High-Velocity Impact and Material Behavior
- X-ray Diffraction in Crystallography
Université Paris-Saclay
2016-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2014-2023
CEA Paris-Saclay
2013-2023
Université du Québec à Montréal
2019
Direction des énergies
2009-2019
Bayer (Germany)
2018
ITER
2015
Institut Nanosciences et Cryogénie
2008-2009
CEA Grenoble
2007-2009
Abstract Clean, safe and economical nuclear energy requires new materials capable of withstanding severe radiation damage. One strategy imparting resistance to solids is incorporate into them a high density solid-phase interfaces absorbing annihilating radiation-induced defects. Here we show that elastic interactions between point defects semicoherent lead marked enhancement in interface sink strength. Our conclusions stem from simulations integrate first principles, object kinetic Monte...
Based on a systematic first-principles study, the lowest-energy migration mechanisms and barriers for small vacancy-solute clusters $({V}_{n}{X}_{m})$ are determined in $\ensuremath{\alpha}$-Fe carbon, nitrogen, oxygen, which most frequent interstitial solutes several transition metals. We show that dominant present at thermal equilibrium ($VX$ $V{X}_{2}$) have very reduced mobility compared to isolated solutes, while composed of solute bound vacancy cluster may be significantly more mobile....
Modification of materials using ion beams has become a widespread route to improve or design for advanced applications, from doping microelectronic devices emulation nuclear reactor environments. Yet, despite decades studies, major issues regarding ion/solid interactions are not solved, one them being the lattice-strain development process in irradiated crystals. In this work, we address question consistent approach that combines x-ray diffraction (XRD) measurements with both molecular...
Body temperature is an easily measured clinical parameter that provides important information about animal’s health and welfare. In the context of animal experiments, monitoring relevant data needed to manage care has been embraced as a means assessing humane endpoints. At same time, measurement in sense 3Rs (Replacement, Refinement, Reduction) should not cause any additional pain or distress animals. Therefore, use noninvasive, accurate, cost-effective methods for great importance research...
Le Canada, les États-Unis et la France ont un double point commun : marqués par l’histoire coloniale ou colonisation de peuplement, ces pays accueilli des réfugiés en provenance du Vietnam, Cambodge Laos à partir deuxième moitié années 1970. L’étude critique récits produits autour cet accueil révèle biais discursifs concernant place assignée aux dans l’écriture nationale. Ces renseignent davantage sur mobiles acteurs institutions qui formulent que le difficile parcours premiers concernés.
Mean-field cluster dynamics (CD) using rate theory is a convenient method to simulate the nucleation, growth, and coarsening of clusters under continuous irradiation or ion implantation up high doses. When displacement cascades are produced, directly nucleated in cascades, so that creation rates must be introduced CD. However, these difficult determine since CD cannot intrinsically account for spatial correlations between cascades. In this article space homogenization proposed an effective...
Interstitial loop coarsening by Ostwald ripening can provide insight into single point defects but is very difficult to observe in α-iron and many other metals where nanoscale vacancy clusters dissociate annihilate loops. We show that implanting helium the samples at a carefully chosen energy, it possible of loops transmission electron microscopy during situ isochronal annealings. This results sharp increase mean radius around 850 K. Using cluster dynamics simulations, we demonstrate evolve...
The asymmetric distribution of geometrically equivalent defects is a long-standing problem in materials science. In this study, we investigate the preferential nucleation interstitial dislocation loops specific planes stressed aluminum, commonly observed experimentally, and seek to clarify underlying mechanism. For purpose, consider structural change geometry defects, specifically transformation 3D compact A15 clusters into 2D Frank loops. Using object kinetic Monte Carlo ab initio...
The microstructural evolution of metals and alloys is governed by the diffusion defects over complex energy landscapes. Whenever metastability occurs in atomistic simulations, well-separated timescales emerge making it necessary to implement event-based kinetic models at larger scales. crucial task then involves characterizing important events contributing mass transport. We herein describe fast first-passage algorithms based on theory absorbing Markov chains assuming that undergo reversible...