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US 7,581,581 B2Granted
Non-oxidizable coating
AssigneeUnited Technologies Corporation
InventorsJoshua E. Persky, Joseph J. Parkos, Jr.
Life of this patent
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Abstract
A substrate is coated by applying a first layer atop the substrate and including, in major weight part, a non-refractory first metal. A second layer is applied atop the first layer and includes, in major weight part, a carbide and/or nitride of a second metal. A third layer is applied atop the second layer and comprises, in major weight part, a ceramic. The substrate may be a refractory metal-based investment casting core.
Claims19
An article of manufacture comprising:
- a refractory metal-based substrate;
- a first means for providing a barrier;
- a second means, located between the first means and the substrate, for securing the first means and containing one or more carbides and/or nitrides;
- and
- a third means, located between the second means and the substrate, for essentially preventing infiltration of at least one of carbon and nitrogen from the second means into the substrate, wherein:
- the first means is ceramic;
- the second means is a carbide;
- and
- the third means is an fcc material.
6 more elements
A method for coating a substrate comprising:
- applying a first layer atop the substrate, the first layer comprising, in major weight part, a non-refractory first metal which forms an FCC lattice structure;
- applying a second layer atop the first layer, the second layer comprising, in major weight part, a carbide and/or nitride of a second metal;
- and
- applying a third layer atop the second layer, the third layer comprising, in major weight part, a ceramic.
1 more element
Dependencies are inferred from the claim text.