Preparation of Cf/SiC Composites by Chemical Liquid-Vapor Deposition Process

摘要：

　　The conversion of the liquid polycabosilane (LPCS) into silicon carbide was investigated by IR,XRD,which indicated the feasibility of the transition from LPCS to SiC ceramics above 900℃.The FTIR spectra and XRD patterns of the Cf/SiC composites show that the matrix deposited at 1200℃ has silicon carbide structure with the crystallite size of β-SiC phase of about 41 nm,while the SiC phase is amorphous at 900℃.The carbon fiber reinforced silicon carbide composites (Cf/SiC) were hereby prepared at 900℃ and 1200℃,through chemical liquid-vapor deposition (CLVD) process using LPCS as precursor.Flexural strength of 224 MPa for Cf/SiC specimen with density of 1.81 g·cm-3 was obtained after being prepared at 1200℃ for 30 minutes.The load-deflection curve has shown that the fracture behavior of the Cf/SiC composites is a typical non-brittleness.The results indicate that the CLVD process has a great advantage and prospect to prepare Cf/SiC composites in future.

关键词： Cf/SiC composites Chemical liquid-vapor deposition Microstructure

作者: Min Mei Xinbo He Xuanhui Qu Haifeng Hu Yudi Zhang Sian Chen

作者单位: School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100 CFC Lab,College of Aerospace and Materials Engineering,National University of Defense Technology,Cha

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 804-807

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）