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- Title
Effect of High Si Content on USi Fuel Microstructure.
- Authors
Rosales, Jhonathan; van Rooyen, Isabella J.; Meher, Subhashish; Hoggan, Rita; Parga, Clemente; Harp, Jason
- Abstract
The development of USi as an accident-tolerant nuclear fuel has gained research interest because of its promising high uranium density and improved thermal properties. In the present study, three samples of USi fuel with varying silicon content have been fabricated by a conventional powder metallurgical route. Microstructural characterization via scanning and transmission electron microscopy reveals the presence of other stoichiometry of uranium silicide such as USi and UO in both samples. The detailed phase analysis by x-ray diffraction shows the presence of secondary phases, such as USi, USi, and UO. The samples with higher concentrations of silicon content of 7.5 wt.% display additional elemental Si. These samples also possess an increased amount of the USi phase as compared to that in the conventional sample with 7.3 wt.% silicon. The optimization of USi fuel performance through the understanding of the role of Si content on its microstructure has been discussed.
- Subjects
NUCLEAR fuels; URANIUM compounds; NUCLEAR fuel elements; SILICON; POWDER metallurgy; MICROSTRUCTURE; FUKUSHIMA Daiichi Nuclear Power Plant (Japan); THERMAL properties
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2018, Vol 70, Issue 2, p209
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-017-2654-6