Oxidation resistant components and related methods
AssigneeGeneral Electric Company
InventorsGeorge Albert Goller, Dennis William Cavanaugh
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Abstract
Oxidation resistant components and methods for creating an aluminum diffusion surface layer within substantially nickel- and cobalt-free components are disclosed. An aluminum-containing slurry may be applied to a component. The component may then be heated to diffuse aluminum into the component and to form an aluminum diffusion surface layer therein. The surface layer may be characterized by an intermetallic aluminum-containing phase extending below the surface of the component.
Claims20
A method for creating an aluminum diffusion surface layer within a substantially nickel- and cobalt-free component, the method comprising:
- applying a slurry coating to a surface of a component, said slurry coating being free from inert fillers and comprising a metallic aluminum alloy, a halogen activator, and a binder;
- and
- heating said component to diffuse aluminum from said slurry coating into said component to form an aluminum diffusion surface layer within said component, said aluminum diffusion surface layer characterized by an intermetallic aluminum-containing phase, wherein said component is formed from a base metal being substantially free from both nickel and cobalt and comprising up to about 27% chromium by weight.
An oxidation resistant component, the oxidation resistant component comprising:
- a base metal configured as a component, said base metal being substantially free from nickel and cobalt and comprising up to about 27% chromium by weight;
- and
- an aluminum diffusion surface layer extending below a surface of said base metal, said aluminum diffusion surface layer characterized by an intermetallic aluminum-containing phase having a thickness of greater than about 50 micrometers.
Dependencies are inferred from the claim text.