US4861618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal barrier coating system
Assignee: RTX Corp
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Filing: 1987-11-16
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Granted: 1989-08-29
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Expires: 2007-11-16
Abstract
Abstract A thermal barrier coating system for the protection of nickel and cobalt base superalloys at elevated temperature comprises 7% yttria partially stabilized zirconia plasma sprayed in air on a plasma sprayed NiCoCrAlY bond coat which has been plasma sprayed in air.
Inventors
- 👤 Raymond W. Vine
- 👤 Keith D. Sheffler
- 👤 Charles E. Bevan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:27
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288; C; C23; C23C; C23C4/00; C23C4/02; C23C4/04; C23C4/06; C23C4/073; C23C4/10; C23C4/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A method of applying a durable thermal barrier coating to a metallic substrate including the steps of a) providing a clean substrate surface b) depositing a metallic bond coat having a composition consisting of 15-40%Cr, 6-15%Al, 0-2%Hf, 0-7%Si, 0.01-1.0%Y bal essentially Ni by plasma deposition in air to a thickness of 0.005-0.015 in. c) depositing a ceramic coating of zirconia stabilized with 6-8wt% yttria by plasma deposition in air to a thickness of 0.010-0.015 in.
Claim 2
Independent Claim
75 words
A method of applying a durable thermal barrier coating to a metallic substrate including the steps of a) providing a clean substrate surface b) depositing a metallic bond coat having a composition consisting of 15-40%Cr, 6-15%Al, 0-2%Hf, 0-7%Si, 0.01-1.0%Y bal essentially Ni by plasma deposition in air to a thickness of 0.005-0.015 in. c) depositing a ceramic coating of zirconia stabilized with 6-8wt% yttria by plasma deposition in air to a thickness of 0.010-0.015 in.
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) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |