First study of uranium self-diffusion in UO2 by SIMS.

Sabioni, Antônio Claret SoaresFerraz, Wilmar BarbosaMillot, F.2012-07-162012-07-161998SABIONI, A. C. S.; FERRAZ, W. B.; MILLOT, F. First study of uranium self-di usion in UO2 by SIMS. Journal of Nuclear Materials, v. 257, n. 2, p. 180-184, nov. 1998. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0022311598004826>. Acesso em: 16 jul. 2012.00223115http://www.repositorio.ufop.br/handle/123456789/1129Uranium self-di€usion coe cients were measured in UO2 single crystals through an original methodology based on the utilization of 235U as tracer and depth pro®ling by secondary ion mass spectrometry (SIMS). The values of the selfdi €usion coe cients measured in this work, between 1498 and 1697°C, in H2 atmosphere, can be described by the following Arrhenius relation: D (cm2/s).8.54 ´ 10ÿ7exp[)4.4(eV)/kT], and are lower than those previously determined by other authors in `nearly stochiometric' UO2 in the same temperature range. Ó 1998 Elsevier Science B.V. All rights reserved.en-USFirst study of uranium self-diffusion in UO2 by SIMS.Artigo publicado em periodicoO periódico Journal of Nuclear Materials concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3345300826219.