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Oxidation resistant Si-Mo-Al coating for C/SiC coated carbon/carbon composites at high temperature
被引:7
|作者:
Zhang, Y. -L.
[1
]
Li, H. -J.
[1
]
Yao, X. -Y.
[1
]
Li, K. -Z.
[1
]
Qiang, X. -F.
[1
]
机构:
[1] Northwestern Polytech Univ, CC Composites Res Ctr, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Carbon/carbon composites;
Oxidation;
Coating;
CARBON-CARBON COMPOSITES;
PROTECTIVE ABILITY;
MICROSTRUCTURE;
WHISKERS;
D O I:
10.1179/1743294411Y.0000000041
中图分类号:
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
A Si-Mo-Al coating for protecting carbon/carbon (C/C) composites against oxidation at elevated temperature was prepared on the surface of the C/SiC coated C/C composites by slurry method. The phase composition, microstructure and oxidation resistance of the coating at 1773 K in air were investigated. The results show that the as prepared coating was mainly composed of SiC, MoSi2, Mo(Si,Al)(2) and Si. The coating provided excellent oxidation protective ability at 1773 K in air and can effectively protect the C/C composites from oxidation for 150 h. The failure of the coating at 1873 K in air is attributed to the spalling of the glass layer during the oxidation tests.
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页码:257 / 260
页数:4
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