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| Oxidation Behavior of C Fiber Reinforced TaC Matrix Composites |
| CHEN Zhaoke; XIONG Xiang; LI Guodong |
| State Key Laboratory of Powder Metallurgy; Central South University; Changsha 41008 |
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Cite this article:
CHEN Zhaoke XIONG Xiang LI Guodong. Oxidation Behavior of C Fiber Reinforced TaC Matrix Composites. Chin J Mater Res, 2010, 24(2): 201-207.
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Abstract C fiber reinforced TaC matrix composites were prepared by isothermal chemical vapor infiltration method. The microstructure, mechanical properties and oxidation behaviors at 1200–1600oC were tested by scanning electron microscopy, INSTRON universal machine and an Al2O3 corundum tube (heated by MoSi2) in natural convection air. The results shown that Cf/TaC composites with density of 5.12 g/cm3 can be prepared by CVI; in which TaC ceramic matrix was composed of needle–like crystal structure. The composites show a good ductibility, but a low flextural strength when compared with C/C composites. The 1200–1600 oC oxidation process of Cf/TaC was mainly controlled by the diffusion of oxidation gases in the connected pore–net structure and the reaction at the TaC/Ta2O5 interface.
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Received: 12 October 2009
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| Fund: Supported by National Nature Science Foundation of China No.50872154, Creative Research Group of
National Natural Science Foundation of China No.50721003 and China Postdoctoral Science Foundation
No.20070420822. |
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