Effective of Ta, Ti and TiN barriers on diffusion and oxidation kinetics of sputtered CoCrAlY coatings
β Scribed by Hanyi Lou; Fuhui Wang
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 733 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0042-207X
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## Abstract A principal concern with aluminaβforming coatings for highβtemperature oxidation protection and bond coats (BCs) for ceramic thermal barrier coatings (TBCs) used in gas turbines is the spalling of the alumina scales during service. This paper describes the effects of BC surface preparat
Kinetic equations are derived which describe the effect of thermal fluctuations upon tracer oxides on the surface of diffusion specimens. The rate of metal oxide reduction by such fluctuations is shown to be consistent with observations on the near-surface effect (NSE) of diffusion. In particular, t