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Mullite-Al2O3-SiC oxidation protective coating for carbon/carbon composites
- Source :
-
Carbon . Nov2003, Vol. 41 Issue 14, p2825. 5p. - Publication Year :
- 2003
-
Abstract
- In order to exploit the unique high temperature mechanical properties of carbon/carbon (C/C) composites, a new type of oxidation protective coating has been produced by a two-step pack cementation technique in an argon atmosphere. XRD analysis showed that the internal coating obtained from the first step was a gradient SiC layer that acts as a buffer layer, and the multi-layer coating formed in the second step was an Al2O3-mullite layer. It was found that the as-received coating characterized by excellent thermal shock resistance on the surface of C/C composites during exposure to an oxidizing atmosphere at 1873 K, could effectively protect the C/C composites from oxidation for 45 h. The failure of the coating is due to the formation of bubble holes on the coating surface. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00086223
- Volume :
- 41
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Carbon
- Publication Type :
- Academic Journal
- Accession number :
- 11151459
- Full Text :
- https://doi.org/10.1016/S0008-6223(03)00397-X