Patent US4055705A successfully refreshed from Google Patents.
US4055705A
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Thermal barrier coating system
Assignee: National Aeronautics and Space Administration
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Filing: 1976-05-14
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Granted: 1977-10-25
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Expires: 1996-05-14
Abstract
Abstract A coating system which contains a bond coating and a thermal barrier coating is applied to metal surfaces such as turbine blades and which provides both low thermal conductivity and improved adherence when exposed to high temperature gases or liquids. The bond coating contains NiCrAlY and the thermal barrier coating contains a reflective oxide. The reflective oxides ZrO2-Y2O3 and ZrO2-MgO have demonstrated significant utility in high temperature turbine applications.
Inventors
- 👤 Stephan Stecura
- 👤 Curt H. Leibert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:22
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; B23K20/233; C; C23; C23C; C23C28/00; C23C28/30; C23C28/32; C23C28/321; C23C28/3215; C23C28/34; C23C28/341; C23C28/345; C23C28/3455; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618; Y10T428/12736; Y10T428/1275; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A coated article of manufacture having a thermal barrier coating system comprising a substrate selected from the group consisting of nickel-base alloys and cobalt-base alloys, a bond coating consisting essentially of NiCrAlY covering said substrate, and a thermal barrier coating consisting essentially of zirconia stabilized with another oxide.
Claim 2
Dependent Claim
48 words
A coated article of manufacture having a thermal barrier coating system comprising a substrate selected from the group consisting of nickel-base alloys and cobalt-base alloys, a bond coating consisting essentially of NiCrAlY covering said substrate, and a thermal barrier coating consisting essentially of zirconia stabilized with another oxide.
Claim 3
Dependent Claim
29 words
The thermal barrier coating system of claim 1 wherein said reflective oxide is selected from the group consisting of ZrO 2 --Y 2 O 3 and ZrO 2 --MgO.
Claim 4
Dependent Claim
22 words
The thermal barrier coating system of claim 1 wherein the thickness of said bond coating is from 0.003 inches to 0.007 inches.
Claim 5
Dependent Claim
22 words
The thermal barrier coating system of claim 1 wherein the thickness of said thermal barrier coating is 0.010 inches to 0.030 inches.
Claim 6
Independent Claim
44 words
A method of coating surfaces of nickel-base and cobalt-base alloys comprising: a. coating said surfaces with a bond coating consisting essentially of NiCrAlY; and coating the coated surfaces formed in step (a) with a thermal barrier coating consisting essentially of an oxide stabilized zirconia.
Claim 7
Independent Claim
44 words
A method of coating surfaces of nickel-base and cobalt-base alloys comprising: a. coating said surfaces with a bond coating consisting essentially of NiCrAlY; and coating the coated surfaces formed in step (a) with a thermal barrier coating consisting essentially of an oxide stabilized zirconia.
Claim 8
Dependent Claim
33 words
The method of coating a metal surface as claimed in claim 5 wherein said reflective oxide is selected from the group consisting of ZrO 2 --Y 2 O 3 and ZrO 2 --MgO.
Claim 9
Dependent Claim
26 words
The method of coating a metal surface as claimed in claim 5 wherein the thickness of the bond coating is from 0.003 inches to 0.007 inches.
Claim 10
Dependent Claim
26 words
The method of coating a metal surface as claimed in claim 5 wherein the thickness of the thermal barrier coating is 0.010 inches to 0.030 inches.
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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |