Abstract

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Title:: Evaluation of Thermal Transmission Properties of PAN Carbon Fiber at High Temperature

Author(s):: He Fengmei Li zhongping Feng Zhihai Chen Conghui Li Qi Wang Xiaoye; (Science and Technology on Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials ＆Processing Technology ，Beijing 100076)

Abstract:: The thermal diffusivity of two kinds of T300 carbon fiber containing different carbon was measured by laser flashing method at temperature 100～2 700 ℃, and the crystallographic parameter was measured by Xray diffraction (XRD) using the Rietveld method after high temperature testing. The results show that thermal diffusivity decreases slowly and thermal conductivity increases in the stage of taking off the resin around the carbon fiber at 100～800 ℃, and the thermal diffusivity and thermal conductivity increase synchronously at 1 300～1 800 ℃ in noncarbon going off stage. Comparing noncarbon going off stage, thermal diffusivity and thermal conductivity in carbon configuration adjusting and optimizing stage increase more slowly at 1 800～2 500 ℃. After 2 500 ℃ treatment the thermal diffusivity and thermal conductivity are similar to those of C/C and graphite, and the datas of the thermal conductivity increase almost 20 times than the original carbon fiber in 100～2 700 ℃.