Patent US3979273A successfully refreshed from Google Patents.
US3979273A
Expired / Lapsed
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Method of forming aluminide coatings on nickel-, cobalt-, and iron-base alloys
Assignee: RTX Corp
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Filing: 1975-05-27
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Granted: 1976-09-07
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Expires: 1995-05-27
Abstract
Abstract A method of coating is described wherein a nickel-, cobalt- or iron-base alloy is provided with a oxidation and sulfidation-resistant coating by depositing, to a thickness greater than one micron but less than three microns, 90-97%, by weight, of a platinum group metal selected from the group consisting of platinum, palladium, rhodium, ruthenium, osmium and iridium and 3-10%, by weight, of an active metal selected from the group consisting of Y, Hf and Zr onto the alloy and subsequently aluminizing the coated substrate.
Inventors
- 👤 Carlino Panzera
- 👤 Richard Carroll Krutenat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:56
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/52; C23C10/02; C23C10/58; C23C28/00; C23C28/02; C23C28/021; C23C28/023; C23C28/028; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/9335; Y10S428/934; Y10S428/941; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12875; Y10T428/12931; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
In a method of forming an oxidation- and sulfidation-resistant alloy coating on a nickel-base, cobalt-base or iron-base alloy gas turbine engine component wherein a platinum group metal is deposited on said alloy and then aluminized to diffuse both said aluminum and said platinum group metal into the surface thereof, the improvement which comprises, prior to aluminizing, depositing on said alloy a combination coating at least approximately one micron, but less than three microns thick, consisting essentially of 90-97%, by weight, platinum group metal selected from the group consisting of platinum, palladium, rhodium, ruthenium, osmium and iridium and 3-10%, by weight, of an active metal selected from the group consisting of yttrium, hafnium and zirconium.
Claim 2
Dependent Claim
114 words
In a method of forming an oxidation- and sulfidation-resistant alloy coating on a nickel-base, cobalt-base or iron-base alloy gas turbine engine component wherein a platinum group metal is deposited on said alloy and then aluminized to diffuse both said aluminum and said platinum group metal into the surface thereof, the improvement which comprises, prior to aluminizing, depositing on said alloy a combination coating at least approximately one micron, but less than three microns thick, consisting essentially of 90-97%, by weight, platinum group metal selected from the group consisting of platinum, palladium, rhodium, ruthenium, osmium and iridium and 3-10%, by weight, of an active metal selected from the group consisting of yttrium, hafnium and zirconium.
Claim 3
Dependent Claim
24 words
The invention of claim 1 wherein said platinum group metal and said active metal are deposited sequentially to form a plurality of separate layers.
Claim 4
Dependent Claim
31 words
The invention of claim 1 wherein said platinum group metal and said active metal are deposited simultaneously to form an intimate interspersion of said active metal in said platinum group metal.
Claim 5
Dependent Claim
51 words
The invention of claim 3 wherein said active metal is yttrium and said platinum group metal is platinum, said metals being deposited simultaneously to form a combination coating consisting essentially of at least approximately one, but less than three microns of platinum having approximately 3-5%, by weight, yttrium intimately interspersed therethrough.
Claim 6
Dependent Claim
14 words
The invention of claim 4 wherein said yttrium is co-sputtered simultaneously with said platinum.
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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |