文献类型：期刊文献

英文题名：C/C-SiC composites derived from single-source poly(silylene-acetylene) precursors

作者：Dong, Shilong[1];Hu, Xueying[1];Yuan, Qiaolong[1];Huang, Farong[1]

机构：[1]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tec, Sch Mat Sci & Engn, Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：19

期号：6

起止页码：3202

外文期刊名：INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY

收录：;EI(收录号：20222712326213);WOS:【SCI-EXPANDED(收录号:WOS:000822064700001)】；

基金：This work was supported by the Fundamental Research Fund for Center Universities (Grant no. JKD01211701).

语种：英文

外文关键词：ceramic-matrix composites; ethynylphenyl-terminated poly(silylene-acetylene); phase transformations; polymer precursors; pyrolysis; thermal properties

摘要：Carbon-fiber-reinforced carbon-silicon carbide (C/C-SiC) composites were prepared by impregnating carbon fibers with ethynylphenyl-terminated poly(silylene-acetylene) (EPTSA) as a single-source precursor with subsequent hot pressing and pyrolysis. The structural evolution, crystallization behavior, and graphitization of bulk C-SiC ceramics, as well as their mechanical properties and ablation behavior, were investigated. The EPTSA precursor starts to transform into inorganic SiC ceramic materials at 800 degrees C, which is characterized by an amorphous structure with weight loss, shrinkage, and densification between 800 and 1000 degrees C. The formation of SiC crystals inhibited the growth of the graphitic structure between 1000 and 1200 degrees C. As the temperature was raised, both graphite and SiC crystals continued to grow, and the crystalline forms became more complete. The carbon-fiber cloth (T300CF)-reinforced C-SiC composite (T300CF/C-SiC) prepared using polymer infiltration and pyrolysis (PIP) exhibited excellent mechanical properties. After five PIP cycles, the flexural strength, flexural modulus, and interlaminar shear strength of the T300CF/C-SiC composite reached 169 MPa, 32.5 GPa, and 9.38 MPa, respectively. In addition, the chopped-carbon-fiber-reinforced C-SiC composite fabricated using the PIP process demonstrated good oxyacetylene-torch ablation properties.