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A method of applying a thermal barrier coating to a metallic article and a thermal barrier coated metallic article
A method of applying a thermal barrier coating to a metallic article (26) comprising ball nose milling the surface of the metallic article (26) to produce a pattern in the surface of the metallic article (26) and to produce a compressive residual stress in the subsurface layers of the metallic article (26). The pattern comprises a plurality of pockets (35) and a plurality of projections (37) on the surface of the metallic article (26). A thin adherent layer of oxide (40) is created on the metallic article (26). A ceramic coating (42) is applied to the oxide layer (40) on the surface of the metallic article (26) such that the ceramic coating (42) deposits on the surface of the metallic article (26) in the pockets (35) and on and around the projections (37). The ceramic coating (42) is applied as a plurality of columnar ceramic grains (41) extending substantially perpendicularly away from the metallic article (26) and the columnar ceramic grains (41) extending from the oxide layer (40) on the metallic article (26).
A method of applying a thermal barrier coating to a metallic article and a thermal barrier coated metallic article
A method of applying a thermal barrier coating to a metallic article (26) comprising ball nose milling the surface of the metallic article (26) to produce a pattern in the surface of the metallic article (26) and to produce a compressive residual stress in the subsurface layers of the metallic article (26). The pattern comprises a plurality of pockets (35) and a plurality of projections (37) on the surface of the metallic article (26). A thin adherent layer of oxide (40) is created on the metallic article (26). A ceramic coating (42) is applied to the oxide layer (40) on the surface of the metallic article (26) such that the ceramic coating (42) deposits on the surface of the metallic article (26) in the pockets (35) and on and around the projections (37). The ceramic coating (42) is applied as a plurality of columnar ceramic grains (41) extending substantially perpendicularly away from the metallic article (26) and the columnar ceramic grains (41) extending from the oxide layer (40) on the metallic article (26).
A method of applying a thermal barrier coating to a metallic article and a thermal barrier coated metallic article
2015-11-18
Patent
Electronic Resource
English
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