中南大学学报（自然科学版）2013，Vol.44Issue(1)：40-45,6.
C/C-SiC复合材料的导热性能及其影响因素
Thermal conductivity of C/C-SiC composites and its influence factors
摘要
Abstract
Carbon fibre reinforced carbon and silicon carbide dual matrix composites (C/C-SiC) were fabricated by the combination of chemical vapor infiltration (C VI) with liquid silicon infiltration (LSI). The effects on thermal conductivity of C/C-SiC composites were investigated. The results show that the specific heat capacity of C/C-SiC increases with the increase of temperature and reaches the highest value of 2.18 J/(gK) at 700 ℃, and decreases to 0.57 J/(gK) at 1 300 ℃. At the same temperature, the thermal conductivity of C/C-SiC is 3.95 W/(mK). The thermal diffusivity of C/C-SiC decreases to constant with the increase of temperature. The thermal diffusivity parallel to friction surface is obviously larger than that perpendicular to friction surface. The thermal diffusivity paralled to friction surface is quite to that of perpendicularity of C/C-SiC using the preform as web, and the thermal diffusivity significantly increases with the increase of mass fraction of the resin carbon and the treatment of graphitization.关键词
C/C-SiC复合材料/导热系数/熔融渗硅/炭纤维Key words
C/C-SiC composites/ thermal conductivity/ liquid silicon infiltration/ carbon fibre分类
通用工业技术引用本文复制引用
李专,肖鹏,熊翔,黄伯云..C/C-SiC复合材料的导热性能及其影响因素[J].中南大学学报（自然科学版）,2013,44(1):40-45,6.基金项目
国家自然科学基金资助项目(51205417,51072231):中国博士后科学基金资助项目(20110491278) （51205417,51072231）
中南大学自由探索计划项目(2011QNZT43)) （2011QNZT43）
