| Issue |
J. Phys. IV
Volume 05, Number C3, Avril 1995
37ème Colloque de Métallurgie de l'INSTNMicrostructures et Recristallisation |
|
|---|---|---|
| Page(s) | C3-297 - C3-303 | |
| DOI | https://doi.org/10.1051/jp4:1995330 | |
37ème Colloque de Métallurgie de l'INSTN
Microstructures et Recristallisation
J. Phys. IV 05 (1995) C3-297-C3-303
DOI: 10.1051/jp4:1995330
1 Laboratoire des Céramiques Nucléaires, Direction des Réacteurs Nucléaires, CEA-CE de Cadarache, 13108 Saint Paul-lez-Durance cedex, France
2 Branche Combustible, COGEMA, 78141 Vélizy-Villacoublay cedex
© EDP Sciences 1995
Microstructures et Recristallisation
J. Phys. IV 05 (1995) C3-297-C3-303
DOI: 10.1051/jp4:1995330
Diffusion Cationique et Croissance Cristalline à l'Interface UO2-PuO2
S. Mendez1, S. Pillon1, D. Warin1 and R. Lorenzelli21 Laboratoire des Céramiques Nucléaires, Direction des Réacteurs Nucléaires, CEA-CE de Cadarache, 13108 Saint Paul-lez-Durance cedex, France
2 Branche Combustible, COGEMA, 78141 Vélizy-Villacoublay cedex
Abstract
Interdiffusion coefficients of plutonium and uranium have been calculated from electron microprobe analysis of diffusion couples UO2 (green compact) / PuO2 (green compact) or UO2 (green compact) / UO2+PuO2 (green compact). A series of these diffusion couples was sintered at 1773, 1873 and 2023 K during 0 to 50 hours and under controlled oxygen potential (-88, -95 and -125 kcal/mol). The results show that grain-boundary diffusion predominates in the overall diffusion process, even during sintering and that lattice diffusion is very slow. The sintering process enhances the interdiffusion coefficients which are greater by one order of magnitude compared to those of polycrystalline diffusion couples.
© EDP Sciences 1995