Abstract
Two types of protective coatings are applied on the Ni or Co-base superalloys used in the high temperature - parts of aircraft or industrial turbines.
The coatings made of intermetallic compounds are mainly aluminides and sometimes silicides. They are most often produced by C.V.D. type techniques, especially pack-cementation. Their formation is generally governed by various diffusional mechanisms.
The overlay coatings are made of more or less complex alloys whose compositions depend on the projected applications (aircraft or industrial turbines). They are usually obtained by P.V.D. type techniques or by spraying.
These two types of coatings are presented in this paper with particular emphasis on the various possibilities to improve their properties. Different problems related to their deposition and use are discussed. Recent developments, such as thermal barriers are also included.
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Duret, C., Davin, A., Marijnissen, G., Pichoir, R. (1982). Recent Approaches to the Development of Corrosion Resistant Coatings. In: Brunetaud, R., Coutsouradis, D., Gibbons, T.B., Lindblom, Y., Meadowcroft, D.B., Stickler, R. (eds) High Temperature Alloys for Gas Turbines 1982. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7907-9_2
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