Journal
CERAMICS INTERNATIONAL
Volume 42, Issue 13, Pages 14518-14525Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.06.064
Keywords
Coating; Hfc nanowires; Cabon/carbon composites; Oxidation resistance
Categories
Funding
- National Natural Science Foundation of China [51272213, 51221001, 51202093]
- 111 project [B08040]
- Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China [98-QZ-2014]
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To improve the oxidation resistance of carbon/carbon (C/C) composites, a dense HfC nanowire-tough-ened Si-Mo-Cr/SiC multilayer coating was prepared by chemical vapor deposition (CVD) and pack cementation. The microstructure, thermal shock and isothermal oxidation resistance of the coating were investigated. HfC nanowires could improve the toughness of the coating and suppress the coating cracking. After incorporating HfC nanowires in the coating, both of the thermal shock and isothermal oxidation resistance of the coating were obviously improved. The multilayer coating with HfC nanowires could effectively protect C/C composites at 1773 K for 270 h, whose weight loss is only 0.19%. The good oxidation resistance is mainly attributed to the formation of a compound glass layer containing SiO2 and Cr2O3. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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