US4080486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating system for superalloys
Assignee: General Electric Co
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Filing: 1974-09-24
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Granted: 1978-03-21
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Expires: 1994-09-24
Abstract
Abstract A protective coating system is provided for nickel-base and cobalt-base superalloys which is capable of imparting oxidation and corrosion resistance at elevated temperatures. The superalloy body is first coated by physical vapor deposition with a composition consisting essentially of chromium, aluminum, a member selected from the group consisting of yttrium and the rare earth elements, and at least one element selected from the group consisting of iron, cobalt and nickel, and thereafter the body is subjected to an aluminizing overcoating to increase the corrosion resistance.
Inventors
- 👤 James L. Walker
- 👤 John R. Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:48
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C23C10/00; C23C10/02; C23C28/00; C23C28/02; C23C28/021; C23C28/023; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12861; Y10T428/12931
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
A coated gas turbine engine component comprising a substrate selected from the group consisting of a nickel-base and a cobalt-base superalloy, and a coating system thereon comprising a first coating composition consisting essentially of chromium, aluminum, a member selected from the group consisting of yttrium and the rare earth elements, and an element selected from the group consisting of iron, cobalt and nickel, and an aluminizing overcoating to increase the oxidation and corrosion resistance of the substrate.
Claim 2
Dependent Claim
77 words
A coated gas turbine engine component comprising a substrate selected from the group consisting of a nickel-base and a cobalt-base superalloy, and a coating system thereon comprising a first coating composition consisting essentially of chromium, aluminum, a member selected from the group consisting of yttrium and the rare earth elements, and an element selected from the group consisting of iron, cobalt and nickel, and an aluminizing overcoating to increase the oxidation and corrosion resistance of the substrate.
Claim 3
Dependent Claim
32 words
The component of claim 1, wherein the first coating has a thickness of about 3-5 mils and the aluminizing overcoating penetrates into the first coating to a depth of about 1-2 mils.
Claim 4
Dependent Claim
12 words
The component of claim 1, wherein said substrate is a nickel-base superalloy.
Claim 5
Dependent Claim
12 words
The component of claim 1, wherein said substrate is a cobalt-base superalloy.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |