Cr-incorporated uranium nitride composite fuels with enhanced mechanical performance and oxidation resistance
نویسندگان
چکیده
Cr-incorporated UN (Cr-UN) composite fuels with different Cr amounts up to 10 wt% are fabricated by spark plasma sintering, and their microstructure phase heterogeneity analyzed. Highly densified homogeneous distribution identified for the pellets, demonstrating a liquid sintering characteristic enriched on grain boundaries. A ternary U2CrN3 forms in Cr-UN matrix of 5 wt%. The SPS pellets display greatly-improved thermal conductivity simultaneously high hardness fracture toughness. toughness pellet is ∼5.5 MPa-m1/2, representing almost 130% enhancement as compared that monolithic sintered at same condition. also enhanced oxidation resistance evidenced increased onset temperature 450 oC Cr-UN. These results highlight additive formation can be useful improve thermal-mechanical properties well-maintained fissile element density.
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ژورنال
عنوان ژورنال: Journal of Nuclear Materials
سال: 2022
ISSN: ['1873-4820', '0022-3115']
DOI: https://doi.org/10.1016/j.jnucmat.2021.153486