Book chapter
Corrosion Protection and Development of Corrosion-Resistant Ceramics
Corrosion of High-Performance Ceramics, pp 151-162
1992
Abstract
The coating of a ceramic surface with nitrides, carbides or oxides is a key method of corrosion protection. As it was already mentioned in Chap. 1, chemical-vapour deposited (CVD) silicon nitride and silicon carbide exhibit a very high oxidation resistance. Oxide coatings can also reliably protect from oxidation. To enhance the corrosion resistance of materials in molten metals, their surface is coated with aluminium nitride. An optimum performance is achieved by coating a base material with the same compound, i.e. Si3N4 on silicon nitride ceramics, SiC on silicon carbide ceramics and so on. In this case the coating adheres well to the base material, the risk of its delamination or cracking on heating because of the difference in the thermal expansion coefficients of the coating and the base material is reduced to a minimum. The principal methods of coating are CVD [7.1] and plasma spraying [7.2]. For porous materials the impregnation with different compositions which creates a dense corrosion-resistant surface layer is also used. In the following we describe the protection methods in more detail.
Metrics
11 Record Views
Details
- Title
- Corrosion Protection and Development of Corrosion-Resistant Ceramics
- Creators
- Yury G GogotsiVladimir A Lavrenko
- Publication Details
- Corrosion of High-Performance Ceramics, pp 151-162
- Publisher
- Springer Berlin Heidelberg; Berlin, Heidelberg
- Resource Type
- Book chapter
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Other Identifier
- 991014969776004721