Microstructure and mechanical properties of C/C composites with gradient distributed TaC interlayer

被引：0
|
作者：
Li, Bin [1 ]
Chen, Zhao-Ke [1 ]
Xiong, Xiang [1 ]
机构：
[1] State Key Laboratory for Powder Metallurgy, Central South University
来源：
Cailiao Gongcheng/Journal of Materials Engineering | 2013年 / 09期
关键词：
C/C composite; Gradient distribution; Interlayer; Mechanical property; Microstructure;
D O I：
10.3969/j.issn.1001-4381.2013.09.002
中图分类号：
学科分类号：
摘要：
TaC ceramic interlayer was deposited on carbon fiber in three-dimensional fine-woven punctured felt by using chemical vapor infiltration method. By controlling the flow direction of the reaction gases in the preform, C/C composites with gradient distributed TaC interlayer were obtained. Microstructure, flexural property and fracture toughness of the as-prepared composites were studied. The results show that TaC interlayer is deposited on the surface of carbon fiber and presents a gradient distribution in C/C composites. The average flexural strength and fracture toughness of the as-prepared composites are 272.6 MPa and 5.0 MPa · m1/2, respectively. In general, with the decreasing of the TaC content along the thickness direction (Z-axis) of the composites, the length of carbon fiber pulled out from the carbon matrix becomes shorter. In TaC-rich area, TaC content has significant influence on fracture behavior of the composites. The fracture behavior of the TaC-rich area is brittle in outer layer which has more TaC, while change to pseudo-ductile in inner layer which has less TaC.
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页码：6 / 10
页数：4
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