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 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
2013
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Subjects | |
Online Access | Get full text |
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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) |
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ISSN: | 1003-6326 |