US4639399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel oxide, ceramic insulated, high temperature coating
Assignee: United States Department of the Navy
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Filing: 1985-11-26
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Granted: 1987-01-27
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Expires: 2005-11-26
Abstract
Abstract A three layer composite coating for gas turbine engine materials and other materials exposed to high temperatures, thermal cycling, and corrosive environments. The base layer is Aluminide or an MCrAlY composite, where M is a metal selected from the group consisting of nickel or cobalt, alone or in combination. The middle layer is a ceramic composite. The outer layer is composed of nickel oxide.
Inventors
- 👤 Louis F. Aprigliano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:42
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/30; C; C23; C23C; C23C28/00; F01; F01D; F01D25/00; F01D25/007; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/12611
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
85 words
A corrosion, oxidation, and heat resistant layered coating for a substrate material in a high temperature, corrosive environment, consisting of: a base layer selected from the group consisting of Aluminide and MCrAlY, wherein M is a metal selected from the group consisting of nickel, cobalt, and a combination thereof; a ceramic layer, impermeable to the metallic elements of said substrate material and said MCrAlY layer, and bonded to said substrate material by said MCrAlY layer; and, a nickel oxide layer, applied to said ceramic layer.
Claim 2
Dependent Claim
85 words
A corrosion, oxidation, and heat resistant layered coating for a substrate material in a high temperature, corrosive environment, consisting of: a base layer selected from the group consisting of Aluminide and MCrAlY, wherein M is a metal selected from the group consisting of nickel, cobalt, and a combination thereof; a ceramic layer, impermeable to the metallic elements of said substrate material and said MCrAlY layer, and bonded to said substrate material by said MCrAlY layer; and, a nickel oxide layer, applied to said ceramic layer.
Claim 3
Dependent Claim
53 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said base layer is an MCrAlY, and wherein the chemical composition by weight of said MCrAlY layer is in the range of: 20% to 40% Cr; 5% to 15% Al; 0% to 1% Y; and the balance being M.
Claim 4
Dependent Claim
44 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said base layer is an MCrAlY, and wherein the chemical composition by weight of said MCrAlY layer is about 25% Cr, 10% Al, 0.3% Y, and, the balance being cobalt.
Claim 5
Dependent Claim
37 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said base layer is an MCrAlY, and wherein the thickness of said MCrAlY layer is in the range of one to five mils.
Claim 6
Dependent Claim
36 words
A corrosion, oxidation and heat resistant layered coating as recited in claim 1, wherein said ceramic layer consists essentially of zirconia, stabilized by an additive selected from the group consisting of yttria, magnesia, calcia, and alumina.
Claim 7
Dependent Claim
24 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said ceramic layer consists essentially of zirconia stabilized by alumina.
Claim 8
Dependent Claim
24 words
A corrosion, oxidation and heat resistant layered coating as recited in claim 1, wherein said ceramic layer ccnsists essentially of zirconia stabilized by magnesia.
Claim 9
Dependent Claim
24 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said ceramic layer consists essentially of zirconia stabilized by calcia.
Claim 10
Dependent Claim
24 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said ceramic layer consists essentially of zirconia stabilized by yttria.
Claim 11
Dependent Claim
26 words
A corrosion, oxidaticn and heat resistant layered coating as recited in claim 9, wherein said ceramic layer consists essentially of an 8 mole % Yttria composition.
Claim 12
Dependent Claim
22 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said ceramic layer consists essentially of silicon nitride.
Claim 13
Dependent Claim
22 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said ceramic layer consists essentially of silicon carbide.
Claim 14
Dependent Claim
29 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein the thickness of said ceramic layer in in the range of one to fifteen mils.
Claim 15
Dependent Claim
29 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein the thickness of said ceramic layer is in the range of two to seven mils.
Claim 16
Dependent Claim
34 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein the thickness of said nickel oxide layer is in the range of one tenth of one mil to ten mils.
Claim 17
Dependent Claim
34 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein the thickness of said nickel oxide layer is in the range of one tenth of one mil to two mils.
Claim 18
Dependent Claim
19 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 1, wherein said base layer is aluminide.
Claim 19
Dependent Claim
29 words
A corrosion, oxidation, and heat resistant layered coating as recited in claim 17, wherein the thickness of said aluminide layer is in the range of one to five mils.
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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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |