固体火箭技术2016，Vol.39Issue(1)：95-99,105,6.DOI:10.7673/j.issn.1006-2793.2016.01.017
制备工艺对三维针刺C/SiC层向动态压缩性能的影响
Effect of preparation process on layer-directional dynamic compressive properties of 3N C/SiC composites
摘要
Abstract
In order to study the effect of different preparation processes on compressive mechanical properties, the compressive properties of 3N-C/SiC composites prepared by reaction melt impregnation ( RMI) and chemical vapor impregnation ( CVI) were in-vestigated respectively at various strain rates, and compared the microstructure of the samples before and after failure. The results show that the failure strength of the two kinds of composite under high strain rate all obeys Weibull distribution, and RMI compos-ites have a higher stability than the CVI composites. Both composites present an obvious strengthening effect on strain rate, mean-while, the relationship between failure strength and logarithmic strain rate characterizes linear. According to the fracture morpholo-gy, the mixture of shear failure and delaminated failure leads to the failure under quasi-static compression, on the contrary, the failure mode of the composites under dynamic compression is splitting failure. In addition, fracture of the samples with RMI process is smoother than the samples with CVI. The phenomenon of debonding within bundle is inhibited obviously under dynamic loading for the samples with RMI process.关键词
三维针刺C/SiC复合材料/Weibull分布/RMI工艺/CVI工艺/破坏模式Key words
3N-C/SiC/Weibull distribution/RIM process/CVI process/failure mode分类
航空航天引用本文复制引用
高晓菊,成来飞,燕东明,李良军,方志坚..制备工艺对三维针刺C/SiC层向动态压缩性能的影响[J].固体火箭技术,2016,39(1):95-99,105,6.基金项目
烟台市科技发展计划项目(2013JH020)。 （2013JH020）
