Damage evaluation of W-coated SiC by thermal conductivity measurement

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Abstract

To evaluate the damage of W-coated SiC/SiC composites by thermal conductivity, evaluation of thermal conductivity measurement was performed for W-coated SiC, which was damaged by electron beam-induced thermal impact. After thermal impact of about 6 MW/m2, melted phases around W/SiC interphase and reduction of thermal conductivity were observed. It was suggested that the temperature of the W/SiC interphase was raised to the melting point of a reaction phase, by the thermal impact of about 6 MW/m2, and therefore a melted phase flowed out from the W/SiC interphase and cracks, reducing the thermal conductivity. Numerical calculations showed that the temperature of the W/SiC interphase could be controlled by the thickness of the W coating. The relation between melted phases and reduction of thermal conductivity will be investigated. © 2004 Elsevier B.V. All rights reserved.

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Lee, Y., Son, S. J., Katoh, Y., & Kohyama, A. (2004). Damage evaluation of W-coated SiC by thermal conductivity measurement. In Journal of Nuclear Materials (Vol. 329–333, pp. 549–553). https://doi.org/10.1016/j.jnucmat.2004.04.115

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