Abstract
To improve the oxidation resistance of carbon/carbon (C/C) composites in air at high temperatures, a SiC-MoSi2/ZrO2-MoSi 2 coating was prepared on the surface of C/C composites by pack cementation and slurry method. The microstructures and phase compositions of the coated C/C composites were analyzed by scanning electron microscopy and X-ray diffraction, respectively. The result shows that the SiC-MoSi 2/ZrO2-MoSi2 coating is dense and crack-free with a thickness of 250-300 μm. The preparation and the high temperature oxidation property of the coated composites were investigated. The as-received coating has excellent oxidation protection ability and can protect C/C composites from oxidation for 260 h at 1773 K in air. The excellent anti-oxidation performance of the coating is considered to come from the formation of ZrSiO4, which improves the stability of the coating at high temperatures.
Original language | English |
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Pages (from-to) | 2113-2117 |
Number of pages | 5 |
Journal | Transactions of Nonferrous Metals Society of China (English Edition) |
Volume | 23 |
Issue number | 7 |
DOIs | |
State | Published - Jul 2013 |
Keywords
- carbon/carbon composites
- coating
- oxidation resistance
- SiC-MoSi/ZrO-MoSi