Alumina-based protective coatings for thermal barrier coatings

Details Alumina-based protective coatings for thermal barrier coatings Alumina-based protective coatings for thermal barrier coatings

2007-10-24

2010-11-16

Xu, Ling (Department: 1784)

Coating processes

Spraying

Heated coating material

C428S457000, C428S304400, C428S469000, C428S472000, C428S701000, C428S702000, C428S697000, C427S427000, C427S453000, C427S454000

Reexamination Certificate

active

07833586

ABSTRACT:
A thermally sprayed alumina-based coating is deposited onto a thermal barrier coating to provide an article such as a turbine engine component with both CMAS mitigation and antifouling. The alumina-based coating increases a melting point of the CMAS to a temperature greater than an operating temperature of the turbine engine component. The surface roughness of the thermally sprayed alumina based coating in less than 4.0 micrometers to 0.75 micrometers. The alumina based coatings include at least 60 weight percent alumina based on a total weight of the alumina-based coating.

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L.C. Erickson et al., “Alumina Coating by Plasma Spraying of Monosize Sapphire Particles” vol. 8 (3), Sep. 1999 pp. 421-426, Journal of Thermal Spray Technology.

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