期刊
SOLID STATE IONICS
卷 282, 期 -, 页码 26-30出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2015.09.006
关键词
UO2; Self-diffusion; Pressure
资金
- Lloyd's Register Foundation
Access to values for oxygen self-diffusion over a range of temperatures and pressures in UO2 is important to nuclear fuel applications. Here, elastic and expansivity data are used in the framework of a thermodynamic model, the cB Omega model, to derive the oxygen self-diffusion coefficient in UO2 over a range of pressures (0-10 GPa) and temperatures (300-1900 K). The significant reduction in oxygen self-diffusion as a function of increasing hydrostatic pressure, and the associated increase in activation energy, is identified. (C) 2015 Elsevier B.V. All rights reserved.
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