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US 2015/0259787 A1Published application
Coating system including diffusion barrier layer including iridium and oxide layer
AssigneeROLLS-ROYCE plc
InventorsSungbo Shim, Ann Bolcavage, Randolph C. Helmink
Life of this patent
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Abstract
In some examples, an article may include a superalloy substrate and a coating on the superalloy substrate. In accordance with this example, the coating includes a diffusion barrier layer on the substrate and a wear resistant oxide layer over the diffusion barrier layer. The diffusion barrier layer may include iridium and the wear resistant oxide layer may include at least one of silica, zirconia, or chromia.
Claims20
An article comprising:
- a superalloy substrate;
- a coating on the superalloy substrate, wherein the coating comprises a diffusion barrier layer on the substrate, wherein the diffusion barrier coating comprises iridium, and a wear resistant oxide layer over the diffusion barrier layer, wherein the wear resistant oxide layer comprises at least one of silica, zirconia, or chromia.
A method comprising:
- depositing a diffusion barrier layer on a superalloy substrate, wherein the diffusion barrier layer comprises Ir;
- and
- depositing a wear resistant oxide layer over the diffusion barrier layer, wherein the wear resistant oxide layer comprises at least one of silica, zirconia, or chromia.
Dependencies are inferred from the claim text.