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Multilayer oxidation protective coating for C/C composites from room temperature to 1500°C
- Source :
-
Surface & Coatings Technology . Feb2010, Vol. 204 Issue 11, p1831-1835. 5p. - Publication Year :
- 2010
-
Abstract
- Abstract: To prevent carbon/carbon (C/C) composites from oxidation, a multilayer oxidation resistant coating was prepared. The inner SiC coating was prepared by pack cementation, and the outer SiC–MoSi2 three-layer coating was obtained by slurry coating using silicon–sol as the caking agent. X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy were used to analyze the phase, microstructure and element distribution of the as-prepared coating. The results show that, the as-received multilayer coating has a crack-free structure with the thickness of about 300μm. It is provided with excellent oxidation resistance from room temperature to 1500°C in air and can protect C/C composites from oxidation for more than 120h at 900°C and more than 110h at 1500°C in air. The weight loss of the coated samples during oxidation tests mainly resulted from the oxidation of Mo5Si3 and the volatilization of SiO2 in the coating. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 02578972
- Volume :
- 204
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Surface & Coatings Technology
- Publication Type :
- Academic Journal
- Accession number :
- 47823872
- Full Text :
- https://doi.org/10.1016/j.surfcoat.2009.11.026