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Patent US4005989A successfully refreshed from Google Patents.
US4005989A
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Coated superalloy article
Assignee: RTX Corp
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Filing: 1976-01-13
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Granted: 1977-02-01
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Expires: 1996-01-13
Abstract
Abstract A protective coating is provided on gas turbine engine type superalloys comprising an interlayer adjacent the superalloy substrate a principal protective element of which comprises an aluminide of the basis metal of the substrate formed by the reaction of aluminum at high temperature with the substrate, and an overlayer comprising an MCrAlY-type coating where M is selected from the group consisting of cobalt, nickel and iron.
Inventors
- 👤 Noel Butters Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:22
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; C22C19/07; C23; C23C; C23C28/00; C23C28/02; C23C28/023; C23C28/30; C23C28/32; C23C28/321; C23C28/3215; C23C28/34; C23C28/341; C23C28/345; C23C28/3455; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/12736; Y10T428/12743; Y10T428/1275; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12861; Y10T428/12931; Y10T428/12944
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
41 words
A coated article comprising: a superalloy substrate, a first coating thereon consisting essentially of an aluminide of the basis metal of the substrate, and an MCrAlY coating thereover, where M is selected from the group consisting of nickel, cobalt, and iron.
Claim 2
Dependent Claim
41 words
A coated article comprising: a superalloy substrate, a first coating thereon consisting essentially of an aluminide of the basis metal of the substrate, and an MCrAlY coating thereover, where M is selected from the group consisting of nickel, cobalt, and iron.
Claim 3
Dependent Claim
68 words
A coated article comprising: a superalloy substrate the basis metal of which is an element selected from the group consisting of nickel, cobalt or iron, a first protective coating thereon the principal protective element of which consists essentially of a ductile aluminide of the basis metal; and an MCrAlY overlay coating over the first coating, where M is selected from the group consisting of nickel, cobalt and iron.
Claim 4
Dependent Claim
68 words
A coated article comprising: a superalloy substrate the basis metal of which is an element selected from the group consisting of nickel, cobalt or iron, a first protective coating thereon the principal protective element of which consists essentially of a ductile aluminide of the basis metal; and an MCrAlY overlay coating over the first coating, where M is selected from the group consisting of nickel, cobalt and iron.
Claim 5
Dependent Claim
40 words
A coated article according to claim 2 wherein: the MCrAlY coating has a composition which consists essentially of, by weight, 15-35 percent chromium, 10-20 percent aluminum, 0.01-3 percent yttrium, balance selected from the group consisting of nickel, cobalt and iron.
Claim 6
Dependent Claim
30 words
A coated gas turbine engine component which comprises: a nickel-base superalloy substrate, a ductile nickel aluminide coating formed at the substrate surface, and a NiCoCrAlY coating over the aluminide coating.
Claim 7
Dependent Claim
30 words
A coated gas turbine engine component which comprises: a nickel-base superalloy substrate, a ductile nickel aluminide coating formed at the substrate surface, and a NiCoCrAlY coating over the aluminide coating.
Claim 8
Dependent Claim
38 words
A coated component according to claim 4 wherein: the NiCoCrAlY coating has a composition consisting essentially of, by weight, 11-48 percent cobalt, at least 15 percent nickel, 10-40 percent chromium, 9- 15 percent aluminum, and 0.01-1 percent yttrium.
Claim 9
Dependent Claim
34 words
A coated component according to claim 5 wherein: the NiCoCrAlY coating has a composition consisting essentially of, by weight, 25-40 percent cobalt, 14-22 percent chromium, 10-13 percent aluminum, 0.01-1 percent yttrium, balance essentially nickel.
Claim 10
Dependent Claim
29 words
A coated gas turbine engine component which comprises: a nickel-base superalloy substrate, a ductile nickel aluminide layer on the substrate surface, and a CoCrAlY coating over the aluminide layer.
Claim 11
Dependent Claim
29 words
A coated gas turbine engine component which comprises: a nickel-base superalloy substrate, a ductile nickel aluminide layer on the substrate surface, and a CoCrAlY coating over the aluminide layer.
Claim 12
Dependent Claim
31 words
A coated component according to claim 7 wherein: the CoCrAlY coating has a composition which consists essentially of, by weight, 15-40 percent chromium, 10-25 percent aluminum, 0.01-5 percent yttrium, balance cobalt.
Claim 13
Dependent Claim
31 words
A coated component according to claim 8 wherein: the CoCrAlY coating has a composition which consists essentially of, by weight, 15-25 percent chromium, 11-14 percent aluminum, 0.1-1 percent yttrium, balance cobalt.
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) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |