Radiation effects in nano powders. CeO2 and aliovalent substitutions in CeO2 as simulants of PuO2
Résumé
Our understanding of radiation damage processes in ceramics remains limited, especially in regimes characterized by pronounced dynamic annealing, a process that refers to the migration and interaction of point defects (during irradiation) after the thermalization of ballistically generated collision cascades over time scales of about 1 ps.
Nanocrystalline systems behave distinctly from their coarse-grained counterparts. It is clear from simulation and characterization experiments that crystallinity extends to the interface and that an interface can grow or shrink during plastic deformation. Atomic diffusion processes in nanocrystalline materials differ fundamentally from the processes of their coarse-grained or single-crystal counterparts. Nanostructured materials provide us with a way to study the intrinsic influence of these interfaces with the potential to predict irradiation resistance at the nanoscale.
Our focus is on damage accumulation in nanocrystals when the size of the system is commensurate with the dimension of the subcascade or the ion track.
| Origine | Fichiers produits par l'(les) auteur(s) |
|---|---|
| Licence |
