US4346137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature fatigue oxidation resistant coating on superalloy substrate
Assignee: RTX Corp
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Filing: 1979-12-19
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Granted: 1982-08-24
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Expires: 1999-12-19
Abstract
Abstract An improved high temperature fatigue resistant coating for nickel and cobalt base superalloys having good oxidation and sulfidation resistance. The coating comprises by weight, 8-30% Co, 8-30% Cr, 5-20% Al, 10-60% Ni and 0.05-1.0% of a reactive metal selected from the group of Y, Sc, La and mixtures thereof, balance selected from the group consisting of Pt, Rh, and mixtures thereof, the (Pt+Rh) content being at least 13%.
Inventors
- 👤 Ralph J. Hecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:16
CPC Classifications
C; C22; C22C; C22C19/00; C23; C23C; C23C30/00; 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; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854; Y10T428/12861; Y10T428/12931; Y10T428/12944; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A coated article consisting of a superalloy substrate having a protective coating on at least part of the substrate, said coating consisting essentially of 8-30% Cr, 5-20% Al, 10-60% Ni, 8-30% Co, from 0.05-1.0% of a material selected from the group consisting of Y, Sc, and La, and mixtures thereof, balance Pt, Rh and mixtures thereof in an amount of at least 13%.
Claim 2
Dependent Claim
63 words
A coated article consisting of a superalloy substrate having a protective coating on at least part of the substrate, said coating consisting essentially of 8-30% Cr, 5-20% Al, 10-60% Ni, 8-30% Co, from 0.05-1.0% of a material selected from the group consisting of Y, Sc, and La, and mixtures thereof, balance Pt, Rh and mixtures thereof in an amount of at least 13%.
Claim 3
Dependent Claim
31 words
A coated article as in claim 1 in which the coating further contains up to 5% of a material selected from the group consisting of Si, Hf, Mg and mixtures thereof.
Claim 4
Dependent Claim
18 words
A coated article as in claim 1 in which the coating thickness is from 1 to 10 mils.
Claim 5
Dependent Claim
20 words
A coated article as in claim 1 which further includes an aluminide interlayer between the substrate and the protective coating.
Claim 6
Dependent Claim
14 words
A coated article as in claim 1 in which the (Pt+Rh) content excedes 17%.
Claim 7
Dependent Claim
14 words
A coated article as in claim 1 in which the (Pt+Rh) content excedes 21%.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |