Article protected by a strong local coating
AssigneeGeneral Electric Company
InventorsRamgopal Darolia, Mark Gorman, Joseph Rigney
Life of this patent
Estimating the term…
Abstract
A protected article includes a substrate having a surface and a substrate aluminum content. A first protective layer overlies a first region of the surface of the substrate, wherein the first protective layer has a composition having a first-protective-layer aluminum content at least 3 atomic percent greater than the substrate aluminum content. A second protective layer overlies a second region of the surface of the substrate different from the first region, wherein the second protective layer has a composition with at least about 60 percent by weight of platinum, rhodium, or palladium, and combinations thereof.
Claims20
A protected article comprising:
- a substrate having a surface and substrate aluminum content;
- a first protective layer overlying a first region of the surface of the substrate, wherein the first protective layer has a composition having a first-protective-layer aluminum content at least 3 atomic percent greater than the substrate aluminum content;
- and
- a second protective layer overlying a second region of the surface of the substrate different from the first region, wherein the second protective layer has a composition having at least about 60 percent by weight of an element selected from the group consisting of platinum, rhodium, palladium, and combinations thereof.
A protected article comprising:
- an airfoil substrate having a surface, wherein the airfoil substrate is a nickel-base superalloy having a substrate-aluminum content;
- and
- a protective structure overlying and deposited upon at least a portion of the surface of the airfoil substrate, wherein the protective structure includes
- a first protective layer overlying a first region of the surface of the airfoil substrate, wherein the first protective layer has a composition having a first-protective-layer aluminum content at least 3 atomic percent greater than the substrate aluminum content, and
- a second protective layer overlying a second region of the surface of the airfoil substrate different from the first region, wherein the second protective layer has a composition having at least about 60 percent by weight of an element selected from the group consisting of platinum, rhodium, palladium, and combinations thereof.
Dependencies are inferred from the claim text.