炭/炭复合材料的热物理性能  

THERMOPHYSICAL PROPERTIES OF CARBON/CARBON COMPOSITES

作　　者：刘涛[1] 罗瑞盈[1] 李进松[1] 张宏波[1] 侯亮亮[1] 

机构地区：[1]北京航空航天大学理学院材料物理与化学研究中心,北京100083

出　　处：《炭素技术》2005年第5期28-33,共6页Carbon Techniques

摘　　要：综述了炭/炭复合材料的热物理性能及其影响因素。炭/炭复合材料热导率的大小由炭纤维的类型、取向、体积分数以及基体的结构类型决定,热处理工艺也对它有很大的影响。炭/炭复合材料的热导率随温度升高一般先升高后降低。炭/炭复合材料在低温时具有负热膨胀系数,影响其这一性能的因素除了坯体结构和基体结构外,还与孔隙率有关。The thermophysical properties of carbon/carbon composites are reviewed, and the factors affecting on the properties of C/C composites are discussed Thermal conductivity of C/C composites depends on the type, tropism, volume fraction of carbon fiber and matrix＇ s micmstructure, which is also substantially affected by heat treatment, Thermal conductivity of C/C goes through a maximum as the temperature increasess. C/C composites exhibit a negative coefficient of thermal expansion at low temperatures, of which other influencing factors include porosity, matrix structure and preform architecture.

关 键 词：炭/炭复合材料 热导率 热膨胀系数 

分 类 号：TB332[一般工业技术—材料科学与工程]