SiC/SiC–YAG–YSZ oxidation protective coatings for carbon/carbon composites |
| |
| Affiliation: | 1. The Applied Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA;2. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA;3. UES Inc., 4401 Dayton-Xenia Road, Dayton, OH 45432, USA;4. NASA Glenn Research Center, Cleveland, OH 44135, USA |
| |
| Abstract: | SiC/SiC–YAG–YSZ coatings were prepared by pack cementation, chemical vapor deposition and slurry painting on carbon/carbon (C/C) composites. The microstructures and oxidation behavior of coatings were investigated. The results show that the coatings displayed good oxidation and thermal shock resistance due to a dense glassy layer with silicates formed on the coating of SiC–YAG–YSZ. The weight gain rate of coated C/C composites was 1.77% after oxidation for 150 h at 1773 K. SiC in outer coating can promote the formation of oxygen diffusion barrier and lead to the optimum oxidation resistance for the coatings, compared with YSZ and YAG. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
