新型炭材料Issue(5)：357-362,6.DOI:10.1016/S1872-5805(14)60142-6
热处理温度对二维高导热炭/炭复合材料结构及热导率的影响
Effect of high temperature treatment on the structure and thermal conductivity of 2 D carbon/carbon composites with a high thermal conductivity
摘要
Abstract
High thermal conductivity carbon/carbon composites ( HTC-C/Cs) have a high specific modulus and a low thermal ex-pansion in addition to all the excellent properties of traditional C/C composites, which have been a research focus in recent years. 2D HTC-C/Cs were prepared by hot pressure molding, densification by precursor impregnation and pyrolysis, and then heat treat-ment at high temperatures, using pitch-based carbon fiber fabric with a high thermal conductivity as reinforcement and mesophase pitch as the binder precursor. The structure and morphology of pitch-based carbon fibers and 2D HTC-C/Cs were investigated by XRD, SEM and TEM. The thermal conductivity was measured by laser-flash diffusivity. Results show that with increasing heat treatment temperature the crystallite size increases, the degree of order is improved, the thickness of laminar graphite around the car-bon fibers increases, and the number of interfacial cracks between the fiber and matrix decrease and cracks between matrix layers are expanded. A linear relationship between thermal conductivity and heat treatment temperature was observed and the highest thermal conductivity was 443 W/m·K after heat treatment at 3 000℃.关键词
热处理/炭/炭复合材料/结构/热导率Key words
Heat treating/C/C composite/Structure/Thermal conductivity分类
化学化工引用本文复制引用
冯志海,樊桢,孔清,熊翔,黄伯云..热处理温度对二维高导热炭/炭复合材料结构及热导率的影响[J].新型炭材料,2014,(5):357-362,6.基金项目
国家973计划项目(2011CB605802).@@@@National Basic Research Program of China (973 Program,2011CB605802) （2011CB605802）
