Patent ID: 6114006
Filing Date: 2000-09-05
Classification: C04B,F28F,Y10T

Abstract:
A process of providing a high thermal conductivity honeycomb structure made from a low-modulus pitch precursor carbon fiber composite comprising initially a composite of low-modulus pitch precursor carbon fibers and a carbonizable thermoset resin, and a graphitic carbon matrix, comprising the steps of providing a low-modulus pitch precursor carbon fiber composite, heating the low-modulus pitch precursor carbon fiber composite to a temperature in the range of approximately 700-900.degree. C., and subsequently heat treating the composite to a temperature between approximately 2200-3200.degree. C., densifying the composite with graphitizable carbon by means of CVD/CVI at a low pressure and a temperature range of approximately 950-1200.degree. C., and heat treating the structure to a temperature between approximately 2200-7200.degree. C. to provide the honeycomb structure made from low-modulus pitch precursor carbon fiber composite and graphitic carbon matrix whereby the honeycomb structure has high thermal conductivity and an increased fiber modulus.