浸渍工艺对先驱体转化制备Cf/SiC复合材料结构与性能的影响

简科; 陈朝辉; 马青松; 郑文伟

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航空材料学报 ›› 2005, Vol. 25 ›› Issue (5) : 38-41.

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论文

浸渍工艺对先驱体转化制备C_f/SiC复合材料结构与性能的影响

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Effect of Infiltration Processes on the Microstructure and Mechanical Properties of C_f/SiC Composites Fabricated by Precursor Porolysis

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摘要

以聚碳硅烷(PCS)/二乙烯基苯(DVB)为先驱体制备了3D-BCf/SiC复合材料,研究了不同浸渍工艺对材料力学性能的影响。结果表明:采用加热加压浸渍可以大大提高先驱体的浸渍效率,提高所制备材料的密度,从而明显提高Cf/SiC复合材料的力学性能。选用加热加压浸渍条件所制备的材料密度达到1.944g/cm3,室温弯曲强度达到662MPa,在1650℃(真空)和1800℃(真空)下测试,材料的弯曲强度分别为647MPa和609MPa。

Abstract

Three-dimensional carbon fibres reinforced SiC composites(3D-B Cf/SiC) were fabricated via infiltration and pyrolysis of polycarbosilane(PCS)/divinylbenzene(DVB).The effects of infiltration processes on the microstructure and mechanical properties of the Cf/SiC composites were investigated.The results showed that comparison with the vacuum infiltration,heating and pressure infiltration could improve the infiltration efficiency and density so that the Cf/SiC composites exhibited higher flexural strength,reached 662MPa at room temperature.Furthermore,when tested at 1650℃ and 1800℃ in vacuum,the flexural strengths of the samples were 647MPa and 609MPa respectively.

导出引用

简科, 陈朝辉, 马青松, 郑文伟. 浸渍工艺对先驱体转化制备C_f/SiC复合材料结构与性能的影响[J]. 航空材料学报, 2005, 25(5): 38-41

JIAN Ke, CHEN Zhao-hui, MA Qing-song, ZHENG Wen-wei. Effect of Infiltration Processes on the Microstructure and Mechanical Properties of C_f/SiC Composites Fabricated by Precursor Porolysis[J]. Journal of Aeronautical Materials, 2005, 25(5): 38-41

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