Effects of preform and pyrolytic carbon structure on thermophysical properties of 2D carbon/carbon composites

被引：0

作者：

Luo, Rui-Ying ^{[1
]}

Cheng, Yong-Hong ^{[1
]}

机构：

[1] College of Science, Beijing Univ. of Aero./Astronautics

来源：

Chinese Journal of Aeronautics | 2004年 / 17卷 / 02期

关键词：

Carbon/carbon(C/C)composite; Pyrolytic carbon; Thermal conductivity; Thermal expansion;

D O I：

10.1016/S1000-9361(11)60223-9

中图分类号：

学科分类号：

摘要：

Four kinds of carbon/carbon (C/C) composites, including the needled carbon fiber felt/the pyrolytic carbon (two different pyrolytic carbon microstructures), the chopped carbon fiber/the resin + pyrolytic carbon (PyrC) , and the carbon cloth/PyrC, named as the composites 1 #, 4 #, 2 #, and 3 #, are prepared respectively. Effects of the preform and pyrolytic carbon structure on the thermophysical properties of 2D C/C composites are studied. The C/C composites possess low coefficient of thermal expansion (CTE). In a range of some temperatures, the negative expansion emerges in x-y direction for four C/C composites. From 0 to 900°C , the CTE is small and almost linear with the temperatures. The C/C composites have high thermal conductivities (TCs). As a function of temperature, TCs of the C/C composites are varied with the structures of preform and pyre as well as the direction of heat transfer. In x-y and z direction, TCs differ greatly and that in x-y direction (25.6-174 W/m·K) is several times larger than that in z direction(3.5-50 W/m·K).

引用

页码：112 / 118

页数：6

共 11 条

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