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Irradiation stability and thermo-mechanical properties of NITE-SiC irradiated to 10 dpa...

by Kurt A Terrani, Caen K Ang, Lance L Snead, Yutai Kato
Publication Type
Journal
Journal Name
Journal of Nuclear Materials
Publication Date
Page Numbers
242 to 247
Volume
499

Five variants of nano-infiltration transient eutectic (NITE) SiC were prepared using nanopowder feedstock and sintering additive contents of <10 wt%. The dense monolithic materials were subsequently irradiated to 2 and 10 dpa in a mixed spectrum fission reactor at nominally 400 and 700°C. The evolution in swelling, strength, and thermal conductivity of these materials were examined after irradiation, where in all cases properties saturated at < 2dpa, without appreciable change for further irradiation to 10 dpa. Swelling behavior appeared similar to high-purity chemical vapor deposition (CVD) SiC within measurement uncertainty. The strength roughly doubled after irradiation. Thermal resistivity increase as a result of irradiation was ~20% higher when compared to CVD-SiC.