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《Materials Review》 2005-01
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Research on a Method of Quickly Preparing C/C Composites

XIE Zhiyong HUANG Qizhong SHU Zhe'an ZHANG Mingyu LIANG Jinhua HUANG Boyun (State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083)  
Using carbon felt as porous performs and liquefied petroleum gas(LPG)as hydrocarbon gas,in- stalling special electric layer in performs to form gradses of temperature and electromagnetic,C/C composites were fabricated by chemical vapor infiltration(CVI)in multi-factor coupling physical fields,and the infiltration conditions have been optimized.The texture of pyrolytic carbons were observed with polarized light microscopy(PLM).The re- suits show that,with multi-factor coupling physical fields,the rate of deposition of pyrolytic carbon has been im- proved greatly,the porous carbon-carbon performs,260mm×60mm×20mm,under the infiltration conditions of 920 ℃、3kPa、45%,can be densified in one-cycle,C/C composites with density of more than 1.7g/cm~3 are obtained in 20h. Though optimizing the infiltration conditions,some kinds of microstructure of pyrolytic carbons can be obtained, range from rough laminar,smooth laminar,isotropie and banded structure.For exemple,in the infiltration conditions of 960℃、0.1kPa、45%,the rough laminar of higher texture can be obtained.
【Fund】: 国家重点工业性试验项目(计高技[1998]1817号);; 中南大学研究生创新工程项目(博士论题创新[2003]30614)
【CateGory Index】: TB332
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