裂解温度对先驱体转化制备2D-Cf/SiC材料结构与性能的影响

简科; 陈朝辉; 马青松; 郑文伟; 胡海峰

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航空材料学报 ›› 2006, Vol. 26 ›› Issue (5) : 61-64.

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论文

裂解温度对先驱体转化制备2D-C_f/SiC材料结构与性能的影响

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Effect of Pyrolysis Temperature on Structure and Properties of 2D-C_f/SiC Composites Fabricated by Precursor Pyrolysis

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摘要

以聚碳硅烷(PCS)、二乙烯基苯(DVB)和SiC微粉为原料制备了2D-Cf/SiC材料,考察了首次裂解温度对材料结构与性能的影响。结果表明,首次裂解温度的提高有助于弱化界面结合,形成良好的界面结构,从而提高材料的力学性能。当裂解温度从1000℃提高到1600℃时,材料的弯曲强度由200.7MPa提高到319.2MPa,剪切强度由16.8MPa提高到29.8MPa,断裂韧度由7.4MPa·m1/2提高到15.0MPa·m1/2。

Abstract

Two-dimensional carbon fiber cloth reinforced silicon carbide(2D-Cf/SiC)composites were fabricated with polycarbosilane(PCS)and divinylbenzene(DVB)as precursors and SiC as inert fillers.The effects of the pyrolysis temperature in the first cycle on the microstructure and mechanical properties of Cf/SiC composites were investigated.The results showed that increasing the first pyrolysis temperature could decrease the interfacial bonding force between carbon fiber and SiC matrix.As a result,the composites fabricated with higher pyrolysis temperature exhabit better mechanical properties.When the pyrolysis temperature of the first cycle raised from 1000℃ to 1600℃,the flexural strength,shear strength and fracture toughness enhanced from 200.7MPa,16.8MPa and 7.4 MPa·m1/2 to 200.7MPa,16.8MPa and 7.4 MPa·m1/2,respectively.

导出引用

简科, 陈朝辉, 马青松, 郑文伟, 胡海峰. 裂解温度对先驱体转化制备2D-C_f/SiC材料结构与性能的影响[J]. 航空材料学报, 2006, 26(5): 61-64

JIAN Ke, CHEN Zhao-hui, MA Qing-song, ZHENG Wen-wei, HU Hai-feng. Effect of Pyrolysis Temperature on Structure and Properties of 2D-C_f/SiC Composites Fabricated by Precursor Pyrolysis[J]. Journal of Aeronautical Materials, 2006, 26(5): 61-64

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