PIP法制备C/C-SiC复合材料的工艺研究  

Preparation of C/C-SiC Composites by PIP Method

作　　者：姜凯[1] 刘瑞祥[1] 王艳艳[1] 徐鸿照[1] 周长灵[1] 杨芳红[1] JIANG Kai;LIU Rui-Xiang;WANG Yan-Yan;XU Hong-Zhao;ZHOU Chang-Ling;YANG Fang-Hong(Shandong Research and Design Institute of Industrial Ceramics Co.,Ltd.,Zibo 255000,China)

机构地区：[1]山东工业陶瓷研究设计院有限公司

出　　处：《现代技术陶瓷》2019年第3期207-214,共8页Advanced Ceramics

摘　　要：以聚碳硅烷为原料,利用前驱体浸渍裂解工艺制备了C/C-SiC复合材料。分别研究了以二乙烯基苯和二甲苯为溶剂的聚碳硅烷溶液的粘度值,选择最佳的溶液对复合材料进行浸渍裂解,同时研究了浸渍工艺对复合材料致密度的影响,并对制备的C/C-SiC复合材料进行了微观结构分析。研究表明:以二甲苯为溶剂配制的质量比为0.4的聚碳硅烷溶液在35.C下具有良好的流动性,裂解产率较高;采用超声、真空加压浸渍方式能够有效提高C/C-SiC复合材料的致密度,缩短制备周期。通过9个周期的浸渍裂解,将复合材料的密度快速提升至1.85g/cm^3,材料的最终开气孔率为12.50%,材料内部结构致密,力学性能优异。Polycarbosilane (PCS) was used as raw material to prepare C/C-SiC composites by precursor impregnation pyrolysis process (PIP). The viscosity of PCS solution with divinylbenzene and xylene as solvent was studied. The optimum solution was chosen to impregnate the composite and the influence of impregnation process on the density of the composite was studied. The microstructure of the prepared C/C-SiC composites was analyzed. The results show that, when xylene is used as solvent and the mass fraction ratio is 0.4, the PCS solution has good fluidity and high pyrolysis yield at 35?C. Ultrasonic and vacuum impregnation can effectively improve the density and shorten the period of C/C-SiC composites. Through nine cycles of impregnation cracking, the density of the composites was rapidly raised to 1.85 g/cm^3, with a final porosity of 12.50%. The internal structure of the composites was dense and the mechanical properties were excellent.

关 键 词：聚碳硅烷 C/C-SIC复合材料 浸渍工艺 PIP 

分 类 号：TB332[一般工业技术—材料科学与工程]