## 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
Effect of Y Distribution on the Oxidation Kinetics of NiCoCrAlY Bond Coat Alloys
β Scribed by T. J. Nijdam; W. G. Sloof
- Publisher
- Springer-Verlag
- Year
- 2007
- Tongue
- English
- Weight
- 425 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0030-770X
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Plasma-sprayed thermal barrier coatings often have problems of spallation and cracking in service owing to their poor bond strength and high residual stresses. Functionally gradient coatings with a gradual composition variation from heat resistant ceramics to fracture-resistant metals are proposed t
Iron-and Ni-base alloys, with and without Hf or Hf and Y alloy additions, were aluminized by chemical vapor deposition to study the potential for minor alloy additions to improve oxidation resistance of coated alloys. Compared to uncoated specimens, the coated specimens showed improved cyclic oxidat