Onset conditions for flash sintering of UO2

Raftery, Alicia M.; Pereira da Silva, João Gustavo; Byler, Darrin D.; Andersson, David A.; Uberuaga, Blas P.; Stanek, Christopher R.; McClellan, Kenneth J.

doi:10.1016/j.jnucmat.2017.06.022

Title: Onset conditions for flash sintering of UO₂

Journal Article · Thu Jun 22 04:00:00 UTC 2017 · Journal of Nuclear Materials

DOI: https://doi.org/10.1016/j.jnucmat.2017.06.022 · OSTI ID:1369204

Raftery, Alicia M. ^[1]; Pereira da Silva, João Gustavo ^[2]; Byler, Darrin D. ^[1]; Andersson, David A. ^[1]; Uberuaga, Blas P. ^[1]; Stanek, Christopher R. ^[1]; McClellan, Kenneth J. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Technical Univ. of Hamburg (Germany)

In this paper, 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 (UO_2.00, UO_2.08, and UO_2.16) 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. Finally, 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.

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Research Organization:: Los Alamos National Laboratory (LANL)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE), Fuel Cycle Technologies (NE-5)

Contributing Organization:: Technical Univ. of Hamburg (Germany)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1369204

Report Number(s):: LA-UR-17-22163

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Vol. 493; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Microstructural evolution of 3YSZ flash‐sintered with current ramp control R. Lavagnini, Isabela; Campos, João V.; Ferreira, Julieta A. Journal of the American Ceramic Society, Vol. 103, Issue 6 https://doi.org/10.1111/jace.17037	journal	February 2020
Flash Sintering Samaria-Doped Ceria–Carbon Nanotube Composites Muccillo, Reginaldo; S. Ferlauto, André; N. S. Muccillo, Eliana Ceramics, Vol. 2, Issue 1 https://doi.org/10.3390/ceramics2010006	journal	January 2019

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