Effects of CVD C or SiC on the Mechanical and Chemical Properties of Carbon Fibers

摘要：

　　After removal of the resin from PAN-carbon fibers,the fibers were coated with C or SiC by chemical vapor deposition (CVD) and the effects of these CVD coatings on the mechanical and chemical properties of carbon fibers were investigated.DTG analysis was conducted at different temperatures (993K,1053K and 1113K) to establish the oxidation reaction models of the C/C or C/SiC coated fibers.The results showed that the CVD coatings enhance the oxidation resistance of the carbon fibers.The surface morphology of the CVD C or SiC fibers was investigated by SEM.The tensile strength of the fibers was found to decrease rapidly after CVD,while the Youngs modulus remained almost constant.These changes can be explained by the interface performance of the carbon fibers and the mechanism of CVD C or SiC deposition.The difference in dilatability between the CVD C or SiC layers and the carbon fibers was the main reason for the tensile failure.

关键词： Carbon fiber CVD TGA Tensile strength

作者: Xu Xianfeng Xiao Peng Xiong Xiang

作者单位: State Key Lab.for Powder Metallurgy,Central South University,Changsha 410083,China;School of Mechani State Key Lab.for Powder Metallurgy,Central South University,Changsha 410083,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 1016-1018

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）