Effect of Compressive Prestress on Young's Modulus and Thermal Conductivity of Carbon Materials

Abstract

Effect of compressive prestress on the correlation between thermal conductivity and Young's modulus of carbon materials, fine-grained isotropic graphite IG-430U and a felt type C/C composite CX-2002U, was examined. Young's modulus and thermal conductivity decreased due to compressive prestress. The change in thermal conductivity of carbon materials was related to that of Young's modulus via sound velocity. The decrease in thermal conductivity of IG-430U graphite due to prestress was mostly correlated with that in Young's modulus. Also, decrease in thermal conductivity of C/C composite showed the similar tendency as the case for the graphite.