Onset conditions for flash sintering of UO2

JOURNAL OF NUCLEAR MATERIALS

卷:493

Article

Raftery, Alicia M.¹  da Silva, Joao Gustavo Pereira²  Byler, Darrin D.¹  Andersson, David A.¹  Uberuaga, Blas P.¹  Stanek, Christopher R.¹  McClellan, Kenneth J.¹ 

[1] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

[2] Tech Univ Hamburg, Hamburg, Germany

关键词: Flash sintering;    Field assisted sintering;    Uranium dioxide;    Nuclear Fuel;   

DOI  :  10.1016/j.jnucmat.2017.06.022

来源: Elsevier

【 摘 要 】

In this work, flash sintering was demonstrated on stoichiometric and non-stoichiometric uranium dioxide pellets at temperatures ranging from room temperature (26 degrees C) up to 600 degrees C. The onset conditions for flash sintering were determined for three stoichiometries (UO2.00, UO2.08, and UO2.16) and analyzed against an established thermal runaway model. The presence of excess oxygen was found to enhance the flash sintering onset behavior of uranium dioxide, lowering the field required to flash and shortening the time required for a flash to occur. The results from this study highlight the effect of stoichiometry on the flash sintering behavior of uranium dioxide and will serve as the foundation for future studies on this material. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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