Microstructure and mechanical properties of short carbon fibre/SiC multilayer composites prepared by tape casting

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• 作者：W.S. Yang^a ; ^{wenshu.yang@polito.it} ; S. Biamino^a ; E. Padovano^a ; L. Fuso^b ; M. Pavese^a ; S. Marchisio^a ; D. Vasquez^a ; C. Vega Bolivar^a ; P. Fino^a ; C. Badini^a
• 关键词：A. Ceramic&ndash ; matrix composites (CMCs) ; A. Layered structures ; A. Carbon fibres ; B. Mechanical properties
• 刊名：Composites Science and Technology
• 出版年：2012
• 期刊代码：19_02663538
• 类别：ms
• 出版时间：27 March, 2012
• 卷：72
• 期：6
• 页码：675-680
• 文件大小：1418 K

摘要

Silicon carbide multilayer composites containing short carbon fibres (C_sf/SiC) were prepared by tape casting and pressureless sintering. The C fibres were dispersed in solvents with dispersant (Triton X-100) firstly and then mixed with the SiC slurry to make green C_sf/SiC tapes. Fibres were homogeneously distributed in the tape and tended to align fairly well along the tape casting direction. The addition of short C fibre hindered the shrinkage in the plane containing the fibres as well as the grain growth of SiC during sintering. The weight loss occurring during oxidation tests of C_sf/SiC multilayer composites increased with fibre amount and material porosity. Elastic modulus of C_sf/SiC multilayer composites decreased linearly with fibre amount. Bending strength presented clear relationship with the relative density, that is with the total porosity.