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HfC nanowire-toughened TaSi2-TaC-SiC-Si multiphase coating for C/C composites against oxidation
被引:59
|作者:
Zhang, Yu-Lei
[1
]
Ren, Jincui
[1
]
Tian, Song
[1
]
Li, Hejun
[1
]
Ren, Xuanru
[1
]
Hu, Zhixiong
[1
]
机构:
[1] Northwestern Polytech Univ, Carbon Carbon Composites Res Ctr, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
来源:
基金:
中国国家自然科学基金;
关键词:
Ceramic matrix composites;
Weight loss;
Thermal cycling;
High temperature corrosion;
Oxidation;
CARBON-CARBON COMPOSITES;
CARBON/CARBON COMPOSITES;
MECHANICAL-PROPERTIES;
ROOM-TEMPERATURE;
PROTECTION;
RESISTANCE;
MICROSTRUCTURE;
BEHAVIOR;
CARBIDE;
TAB2;
D O I:
10.1016/j.corsci.2014.10.048
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
To prevent carbon/carbon (C/C) composites from oxidation at high temperature, a HfC nanowire-toughened TaSi2-TaC-SiC-Si multiphase coating was prepared by a two-step technique including chemical vapor deposition (CVD) and pack cementation. The microstructure and oxidation resistance of the coating were investigated. The HfC nanowires can effectively reduce the size of microcracks and avoid the formation of through-thickness microcracks in the multiphase coating. Due to the toughening mechanisms including nanowire pullout and debonding, the cyclic and isothermal oxidation resistance of the coating are both improved. (C) 2014 Elsevier Ltd. All rights reserved.
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页码:554 / 561
页数:8
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