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US 6,387,527 B1Granted
Method of applying a bond coating and a thermal barrier coating on a metal substrate, and related articles
AssigneeGeneral Electric Company
InventorsWayne Charles Hasz, Marcus Preston Borom
Life of this patent
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Abstract
A method for applying at least one bond coating on a surface of a metal-based substrate is described. A foil of the bond coating material is first attached to the substrate surface and then fused thereto, e.g., by brazing. The foil is often initially prepared by thermally spraying the bond coating material onto a removable support sheet, and then detaching the support sheet. Optionally, the foil may also include a thermal barrier coating applied over the bond coating. The substrate can be a turbine engine component.
Claims14
An article, comprising:
- (i) a metal-based substrate;
- and
- (ii) a foil which comprises at least one bond coating, fused to the substrate, wherein the foil is fused to the substrate by an intervening layer of braze material.
An article, comprising:
- (i) a superalloy substrate;
- (ii) a layer of braze material over the substrate;
- and
- (iii) a foil which comprises a dense, primary bond coating;
- a spongy secondary bond coating over the dense coating;
- and a zirconia-based thermal barrier coating over the secondary bond coating,
- wherein the secondary bond coating has a microstructure which comprises an open network of interconnected pores;
- wherein each of said bond coatings is formed of an alloy material comprising MCrAlY, where M is selected from the group consisting of Fe, Ni, Co, and mixtures of any of the foregoing;
- and
- wherein the braze material fuses the foil to the substrate.
7 more elements
Dependencies are inferred from the claim text.