Microstructure and Mechanical Properties of Multilayertextured 2D Carbon/Carbon Composites
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2014年第12期
论文作者：Yan Jia Kezhi Li Shouyang Zhang Lei Li Junjie Ren
文章页码：1202 - 1207
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.
Yan Jia，Kezhi Li，Shouyang Zhang，Lei Li，Junjie Ren
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University
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.
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