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Effect of Interfacial Treatment Process on the Microstructure and Properties of C_f/SiC Ceramic Matrix Composites

机译:界面处理工艺对C_f / SiC陶瓷基复合材料组织和性能的影响

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This paper investigated the C_f/SiC ceramic matrix composites. By utilizing different interfacial treatment processes to prepare carbon-fiber preform, the preform was then densified by infiltration and pyrolysis with polycarbosilan/xylene solution as precursor, and the C_f/SiC ceramic matrix composite specimens were fabricated. Mechanical tests such as bending test and fracture toughness were performed for C_f/SiC samples. The results show that the interfacial bonding strength in the sample with high-temperature treatment process was improved due to removing surface sizing. The samples which were treated up to 1400℃ exhibited the highest three-point flexural strength, up to 595MPa; The samples which were treated up to 1400℃ and deposited by pyrolytic carbon coating shows the highest fracture toughness value which was 20.70 MPa·m~(1/2).
机译:本文研究了C_f / SiC陶瓷基复合材料。通过采用不同的界面处理工艺制备碳纤维预成型件,然后以聚卡波西兰/二甲苯溶液为前驱体进行浸渗和热解,使预成型件致密化,制备出C_f / SiC陶瓷基复合材料试样。对C_f / SiC样品进行了机械测试,如弯曲测试和断裂韧性。结果表明,由于去除了表面施胶,提高了样品在高温处理过程中的界面结合强度。经1400℃处理的样品表现出最高的三点弯曲强度,高达595MPa;经过1400℃高温处理并进行热解碳沉积的样品的断裂韧性最高,为20.70 MPa·m〜(1/2)。

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