Abstract
Al-Si alloy coating was prepared on the surface of SiC coated carbon-carbon composites by slurry method. Microstructure and oxidation resistance of as-prepared SiC/Al-Si multi-layer coating were studied by XRD, SEM, and isothermal oxidation test under 1500°C in air respectively. The results showed that Al3.21Si0.47 and a few Al2O3 were the main phase of Al-Si outer coating. The thickness of SiC/Al-Si multi-layer coating was about 120 μm and without penetrable cracks. The oxidation resistance of SiC/Al-Si multi-layer coating was obviously better than that of single SiC coating. The mass loss of SiC/Al-Si multi-layer coated carbon-carbon composites was less than 5% (mass fraction) after oxidation for 17h.
| Original language | English |
|---|---|
| Pages (from-to) | 43-46 |
| Number of pages | 4 |
| Journal | Cailiao Gongcheng/Journal of Materials Engineering |
| Issue number | 4 |
| State | Published - Apr 2007 |
Keywords
- Al-Si alloy
- C/C composite
- Coating
- Oxidation resistance
- SiC