Abstract
A Si-Al-Ir oxidation resistant coating was prepared for SiC coated carbon/carbon composites by slurry dipping. The phase composition, microstructure and oxidation resistance of the as-prepared Si-Al-Ir coating were studied by XRD (X-ray diffraction), SEM (scanning electron microscopy), and isothermal oxidation test at 1773 K in air, respectively. The surface of the as-prepared Si-Al-Ir coating was dense and the thickness was approximately 100 μm. Its anti-oxidation property was superior to that of the inner SiC coating. The weight loss of SiC/Si-Al-Ir coated carbon/carbon composites was less than 5 wt. pct after oxidation at 1773 K in air for 79 h. The local oxidation defects in the coating may result in the failure of the SiC/Si-Al-Ir coating. Printed by
| Original language | English |
|---|---|
| Pages (from-to) | 344-346 |
| Number of pages | 3 |
| Journal | Journal of Materials Science and Technology |
| Volume | 25 |
| Issue number | 3 |
| State | Published - May 2009 |
Keywords
- Carbon/carbon composites
- Coatings
- Oxidation
- Si-Al-Ir