Abstract
C/SiC/MoSi2-SiC-Si oxidation protective multilayer coating for carbon/carbon (C/C) composites was prepared by pack cementation and slurry method. The microstructure, element distribution and phase composition of the as-received coating were analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the multilayer coating was composed of MoSi2, SiC and Si. It could effectively protect C/C composites against oxidation for 200 h with the mass loss of 3.25% at 1873 K in static air. The mass loss of the coated C/C composites results from the volatilization of SiO2 and the formation of cracks and bubble holes in the coating.
Original language | English |
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Pages (from-to) | 2118-2122 |
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
- C/C composites
- C/SiC
- coating
- MoSi
- multilayer
- oxidation
- SiC