The thermal properties of tristructural isotropic (TRISO) particle coatings have been measured using laser-based thermoreflectance methods from room temperature to 900 °C. At room temperature the pyrocarbon coatings have comparable thermal conductivities below 10 W·m−1·K−1, whereas the SiC coating has a thermal conductivity around 90 W·m−1·K−1. The thermal diffusivities of all coatings display significant reduction with increasing temperature. The thermal conductivity of SiC decreases by more than 25% above 800 °C and the thermal conductivities of pyrocarbons increase moderately with the temperature, displaying similar changes to that of amorphous graphite at elevated temperatures.
CITATION STYLE
Wang, Y., Hua, Z., Schley, R., Beausoleil II, G., & Hurley, D. H. (2022). Thermal properties measurement of TRISO particle coatings from room temperature to 900 °C using laser-based thermoreflectance methods. Journal of Nuclear Materials, 565. https://doi.org/10.1016/j.jnucmat.2022.153721
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