Microstructure and Mechanical Properties of Multilayertextured 2D Carbon/Carbon Composites

作     者：Yan Jia Kezhi Li Shouyang Zhang Lei Li Junjie Ren 

作者机构：State Key Laboratory of Solidification Processing Northwestern Polytechnical University 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2014年第30卷第12期

页      面：1202-1207页

核心收录：

学科分类：0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China, China (No. 51221001) Graduate Starting Seed Fund of Northwestern Polytechnical University, China (No. Z2012023) 

主　　题：Carbon/carbon composites Mechanical properties Fracture Texture 

摘      要：Two-dimensional（2D） carbon/carbon（C/C） composites with multilayered texture, especially with different thickness of high-textured（HT） pyrocarbon layer, were prepared by isothermal, isobaric chemical vapor infiltration（CVI） technique. The influence of matrix microstructure on mechanical properties of C/C composites was investigated by polarized light microscopy, scanning electron microscopy and three-point bending test. The results show that the samples with multilayer-textured pyrocarbon matrix own a higher flexural strength than the one with pure medium-textured structure, which is attributed to multiple crack deflection and interfacial sliding between different textured pyrocarbon layers and between sub-layers within HT layer. The increase in thickness of HT pyrocarbon layer improves the plasticity of the samples and renders the fracture in pseudo-plastic behavior.