Onset conditions for flash sintering of UO2

Enthalten in
Journal of nuclear materials 
Volume
493
Start Page
264
End Page
270
Citation
Journal of Nuclear Materials (493): 264-270 (2017-09-01)
Publisher DOI
10.1016/j.jnucmat.2017.06.022
Scopus ID
2-s2.0-85021420307
Publisher
Elsevier Science
In this work, flash sintering was demonstrated on stoichiometric and non-stoichiometric uranium dioxide pellets at temperatures ranging from room temperature (26°C) up to 600°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.
Schlagworte
Field assisted sintering
Flash sintering
Nuclear Fuel
Uranium dioxide
DDC Class
600: Technik