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材料工程  2017, Vol. 45 Issue (8): 38-42    DOI: 10.11868/j.issn.1001-4381.2016.000262
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
两种双基体C/C复合材料的微观结构与力学性能
刘皓1, 李克智2
1. 榆林学院 化学与化工学院, 陕西 榆林 719000;
2. 西北工业大学 材料学院, 西安 710072
Microstructure and Mechanical Properties of Two Kinds of Dual-matrix C/C Composites
LIU Hao1, LI Ke-zhi2
1. School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, Shaanxi, China;
2. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China
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摘要 借助偏光显微镜、扫描电镜以及力学性能测试研究了两种双基体C/C复合材料的微观结构与力学性能。结果表明:基体碳在偏光显微镜下呈现出热解碳的光滑层组织,沥青碳的各向同性、镶嵌和流域组织。在SEM下普通沥青碳为"葡萄状"结构,中间相沥青碳为片层条带状结构。具有多层次界面结构的材料可以提高材料的弯曲强度,改善材料的断裂韧度,两种材料在载荷-位移曲线中载荷为台阶式下降,呈现出假塑性断裂特征。材料A和材料B的弯曲强度分别为206.68,243.66MPa,断裂韧度分别为8.06,9.66MPa·m1/2,材料B的弯曲强度、断裂韧度均优于材料A。
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刘皓
李克智
关键词 C/C复合材料双基体微观结构力学性能    
Abstract:The microstructure and mechanical properties of two kinds of dual-matrix C/C composites were studied by polarized light microscopy (PLM), scanning electron microscopy (SEM) and mechanical properties tests techniques respectively. PLM results indicate that the matrix carbon exhibits the smooth laminar structure of the pyrocarbon, the isotropic, mosaics and flow domains of the pitch carbon. The TEM results show the normal pitch carbon is the grape structure; the mesophase pitch carbon is the lamellar banded structure. Materials with multi-interface structure can improve the flexural strength and fracture toughness, the load-displacement curve shows the load drop is decreased for step type, the composites show a pseudo-plastic fracture characteristics. The flexural strengths of the material A and material B are 206.68MPa and 243.66MPa, the fracture toughness are 8.06MPa·m1/2 and 9.66MPa·m1/2, respectively. The flexural strength and fracture toughness of material B are both superior than that of material A.
Key wordsC/C composite    dual-matrix    microstructure    mechanical property
收稿日期: 2016-03-07      出版日期: 2017-08-10
中图分类号:  TB332  
通讯作者: 刘皓(1972-),男,副教授,博士,主要从事碳素材料及煤炭清洁转化研究,联系地址:陕西省榆林市榆林学院化学与化工学院(719000),E-mail:liuh0929@163.com     E-mail: liuh0929@163.com
引用本文:   
刘皓, 李克智. 两种双基体C/C复合材料的微观结构与力学性能[J]. 材料工程, 2017, 45(8): 38-42.
LIU Hao, LI Ke-zhi. Microstructure and Mechanical Properties of Two Kinds of Dual-matrix C/C Composites. Journal of Materials Engineering, 2017, 45(8): 38-42.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.000262      或      http://jme.biam.ac.cn/CN/Y2017/V45/I8/38
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