1. Microstructure and oxidation of multi-layer MoSi2–CrSi2–Si coatings for SiC coated carbon/carbon composites
- Author
-
Feng, Tao, Li, He-Jun, Fu, Qian-Gang, Shen, Xue-Tao, and Wu, Heng
- Subjects
- *
MICROSTRUCTURE , *CERAMIC-matrix composites , *SILICIDES , *OXIDATION , *SURFACE coatings , *CARBON composites , *SILICON carbide , *THERMAL expansion , *INTERMETALLIC compounds - Abstract
Abstract: Multi-layer MoSi2–CrSi2–Si anti-oxidation coatings with different compositional ratios were prepared on the surface of SiC coated carbon/carbon (C/C) composites by a two-step pack cementation method. The microstructure and anti-oxidation performance of the coating were studied. The results show that the multi-layered coatings could protect the C/C composites from oxidation in air at 1773K for 1000h or 1873K for 750h, respectively. The anti-oxidation performance of the multi-layer MoSi2–CrSi2–Si coating is mainly attributed to their dense and microcrack-free structure, appropriate thermal expansion coefficient and the well dispersed MoSi2 and CrSi2 in the coating. [Copyright &y& Elsevier]
- Published
- 2010
- Full Text
- View/download PDF