A5107299017- Fusion materials and technologies
- Nuclear Materials and Properties
- Ion-surface interactions and analysis
- Advanced Materials Characterization Techniques
- Semiconductor materials and devices
- Advanced materials and composites
- Advanced Numerical Methods in Computational Mathematics
- Cavitation Phenomena in Pumps
- Vibration and Dynamic Analysis
- Muon and positron interactions and applications
- Additive Manufacturing Materials and Processes
Université d'Orléans
2021-2023
Conditions Extrêmes et Matériaux Haute Température et Irradiation
2019-2023
Centre National de la Recherche Scientifique
2023
Self-ion irradiation of pure tungsten with 2 MeV W ions provides a way simulating microstructures generated by neutron in components fusion reactor. Transmission electron microscopy (TEM) has been used to characterize defects formed samples ion irradiation. It was found that irradiated 0.85 dpa at relatively low temperatures develops characteristic microstructure dominated dislocation loops and black dots. The density size distribution these were estimated. Some the exposed self-ion then...
Tungsten is considered to be used in the future fusion reactors as plasma-facing material. In such extreme environments, defects are induced materials that modify their macroscopic properties mechanical ones. It of paramount importance able determine concentration and size vacancy defects, from mono large cavities, validate models developed predict evolution microstructure irradiated materials. Positrons very useful non-destructive probes can characterize vacancy-type We present a combined...
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In this work, we propose a new approach based on positron annihilation spectroscopy to estimate the concentration of vacancy-type defects induced by self-ion irradiation in tungsten at room temperature, 500, and 700{\deg}C. Using experimental Two-component density functional theory calculated characteristics various vacancy clusters V$_{n}$ ($n$=1-65) trapping model associated with simulated annealing algorithm, cluster distribution could be extracted from data. The method was validated...
Irradiation of materials in nuclear test reactors and power plants is known to alter the properties material. The irradiation event happening at pico- or nanosecond time scales are affecting evolution material on macroscopic timescales. Classical Molecular Dynamics simulations, which can capture cascade event, typically limited scales, resulting high dose rates. To achieve experimental rates, larger-scale models like Object Kinetic Monte Carlo used, while they lack atomistic detail. exact...
Rotor deformation is one of the key problems large turbine generators. Previous studies mainly calculated unbalanced magnetic pull (UMP) Giant hydroelectric generators are huge in size and extremely complex structure, so there few relevant UMP analyses about them up to now. This paper uses a two-dimensional transient finite element method calculate field reveal effect rotor on 1000 MW hydro-generator time frequency domains. Theoretical calculations good agreement with measurements. The...