Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 35, Issue 7, Pages 2017-2025Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.01.015
Keywords
Carbon/carbon composites; Coating; Microstructure; Oxidation; Thermal cycling
Categories
Funding
- National Natural Science Foundation of China [51472235, 51301180, 21171160, 51101143]
- Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences
- Aid Program for Innovative Group of National University of Defense Technology
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Carbon/carbon composites were plasma sprayed with a ZrB2-SiC-Si/Yb2SiO5/LaMgAl11O9 coating to improve the oxidation resistance at high temperature. Oxidation protection behavior of the coating was investigated by thermal cycling test using a gas flame about 2273 K. Results showed that the weight loss for the completely coated sample was only 0.30% after 10 cycles of heating for 79 min, and it gradually increased to 4.8% until the failure of coating with 24 cycles. The presence of through-cracks and horizontal cracks in the coating due to the durative oxidation of ZrB2-SiC-Si layer progressively accelerated the oxidation of substrate and failure of coating. (C) 2015 Elsevier Ltd. All rights reserved.
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