热处理对3D-C/PyC/SiC力学性能的影响  

Effect of heat-treatment on mechanical properties of 3D-C/PyC/SiC

作　　者：董宁[1] 张立同[1] 徐永东[1] 成来飞[1] 范尚武[1] 

机构地区：[1]西北工业大学超高温结构复合材料国防科技重点实验室,西安710072

出　　处：《固体火箭技术》2008年第2期188-192,197,共6页Journal of Solid Rocket Technology

基　　金：国家自然科学基金重点项目(90405015);国家杰出青年科学基金(50425208);超高温复合材料创新团队项目

摘　　要：研究了2种热处理工艺对3D-C/PyC/SiC力学性能的影响规律和机制。沉积SiC基体前对有PyC界面相的炭纤维编织体进行热处理,使3D-C/PyC/SiC的室温弯曲强度和KIC显著提高,最大提高幅度分别可达38.6%和80.5%。沉积SiC基体后对C/PyC/SiC进行热处理,使3D-C/PyC/SiC的室温弯曲强度和KIC显著降低,最大降低幅度均可达60%以上。The effects of two kinds of heat treatment processes on the mechanical properties of 3D-C/PyC/SiC were investigated. Heat treatment for carbon fiber woven preform with PyC interphase before deposition of SiC matrix can make the flexural strength and KIC of 3D-C/PyC/SiC at room temperature increase obviously,and the maximum amplitude is 38.6% and 80.5% respectively. Heat treatment for C/PyC/SiC after deposition of SiC matrix can make the flexural strength and KIC of 3D-C/PyC/SiC at room temperature decrease obviously, and the maximum amplitude is 60%.

关 键 词：C/PyC/SiC 热处理 热解炭 炭纤维 

分 类 号：TB332[一般工业技术—材料科学与工程]