Effect of grain-boundaries on uranium and oxygen diffusion in polycrystalline UO2.

Sabioni, Antônio Claret SoaresFerraz, Wilmar BarbosaMillot, F.2012-07-162012-07-162000SABIONI, A. C. S.; FERRAZ, W. B.; MILLOT, F. Effect of grain-boundaries on uranium and oxygen diffusion in polycrystalline UO2. Journal of Nuclear Materials, v. 278, n. 2-3, p. 364-369, abr. 2000. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0022311599002500>. Acesso em: 16 jul. 2012.00223115http://www.repositorio.ufop.br/handle/123456789/1128The influence of grain-boundaries on uranium and oxygen difusion in polycrystalline UO2 has been investigated. Our results show that between 1498°C and 1697°C, in H2 atmosphere, uranium difusion in UO2 grain-boundaries is about ®ve orders of magnitude greater than uranium volume di€usion, in the same experimental conditions. Between 605°C and 750°C, in H2/N2/H2O atmosphere, the oxygen difusion coe cients measured in polycrystalline and single crystalline UO2 are similar, and correspond to the volume difusion.en-USEffect of grain-boundaries on uranium and oxygen diffusion in polycrystalline UO2.Artigo publicado em periodicoO periódico Journal of Nuclear Materials concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3345300783343.