高织构热解炭基炭/炭复合材料的制备与力学性能

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Published in中国有色金属学报：英文版 no. 7; pp. 2129 - 2134
Main Author 李伟 李贺军 王杰 张守阳 杨茜 魏建锋
Format Journal Article
LanguageEnglish
Published 2013
Subjects
C复合材料
力学性能
化学气相沉积
石墨化度
高织构
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Bibliography:Short carbon fiber felts with an initial porosity of 89.5% were deposited by isobaric, isothermal chemical vapor infiltration using natural gas as carbon source. The bulk density of the deposited carbon/carbon （C/C） composites was 1.89 g/cm3 after depositing for 150 h. The microstructure and mechanical properties of the C/C composites were studied by polarized light microscopy, X-ray diffraction, scanning electron microscopy and three-point bending test. The results reveal that high textured pyrolytic carbon is deposited as the matrix of the composites, whose crystalline thickness and graphitization degree highly increase after heat treatment. A distinct decrease of the flexural strength and modulus accompanied by the increase of the toughness of the C/C composites is found to be correlated with the structural changes in the composites during the heat treatment process.
43-1239/TG
carbon/carbon composites; high texture; chemical vapor infiltration; graphitization degree; mechanical properties
Wei LI,He-jun LI,Jie WANG,Shou-yang ZHANG,Xi YANG,Jian-feng WEI （C/C Composites Research Center,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China）
ISSN:1003-6326