Preparation and oxidation property of ZrB sub(2-MoSi) sub(2)/SiC coating on carbon/carbon composites

To improve the oxidation resistance of carbon/carbon composites, ZrB sub(2-MoSi) sub(2)/SiC coating on the carbon/carbon substrate was prepared. The inner coating of SiC was prepared by pack cementation and the outer coating of ZrB sub(2-MoSi) sub(2) was prepared by slurry painting. The phase compos...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2011-07, Vol.21 (7), p.1538-1544
Main Authors: Zhang, Wu-Zhuang, Zeng, Yi, Gbologah, Lemuel, Xiong, Xiang, Huang, Bai-Yun
Format: Article
Language:English
Subjects:
Carbon
Coating
Nanostructure
Oxidation
Oxidation resistance
Pack cementation
Paints
Silicon carbide
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Summary:To improve the oxidation resistance of carbon/carbon composites, ZrB sub(2-MoSi) sub(2)/SiC coating on the carbon/carbon substrate was prepared. The inner coating of SiC was prepared by pack cementation and the outer coating of ZrB sub(2-MoSi) sub(2) was prepared by slurry painting. The phase compositions and microstructures of the coating were characterized by XRD and SEM, respectively. The preparation and the high temperature oxidation property of the coated composites were investigated. The results show that the outer coating of carbon/carbon composites is composed of ZrB sub(2, MoSi) sub(2) and SiC phases. The mass losses of the ZrB sub(2-MoSi) sub(2)/SiC coated samples with SiC nano-whiskers after 30 h and 10 h of oxidation at 1 273 K and 1 773 K were, respectively, 5.3% and 3.0%. The ZrB sub(2-MoSi) sub(2)/SiC coated samples exhibit self-sealing performance and good oxidation resistance at high temperature.
ISSN:1003-6326
DOI:10.1016/S1003-6326(11)60893-5