US3869779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex aluminized coatings
Assignee: National Aeronautics and Space Administration
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Filing: 1974-01-24
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Granted: 1975-03-11
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Expires: 1994-01-24
Abstract
Abstract The surface of a metallic base system is initially coated with a metallic alloy layer that is ductile and oxidation resistant. An aluminide coating is then applied to the metallic alloy layer. The chemistry of the metallic alloy layer is such that the oxidation resistance of the subsequently aluminized outermost layer is not seriously degraded.
Inventors
- 👤 Michael A Gedwill
- 👤 Salvatore J Grisaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:16
CPC Classifications
C; C23; C23C; C23C28/00; C23C28/30; C23C28/34; C23C28/345; C23C28/3455; B; B23; B23K; B23K20/00; B23K20/22; B23K20/233; B23K20/2333; C23C10/00; C23C10/02; C23C28/02; C23C28/023; C23C28/32; C23C28/321; C23C28/3215; C23C28/341; C23C4/00; C23C4/04; C23C4/06; C23C4/073; C30; C30B; C30B21/00; C30B21/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/941; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12771; Y10T428/12861; Y10T428/12931; Y10T428/12986
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
45 words
A COATED ARTICLE OF MANUFACTURE COMPRISING A SUPERALLOY SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF NICKEL-BASE SUPERALLOYS AND COBALT-BASE SUPERALLOYS, DISPERSION-STRENGTHENED ALLOYS, COMPOSITES, AND DIRECTIONAL EUTECTICS, A DUCTILE, OXIDATION RESISTANT METALLIC ALLOY LAYER COVERING SAID SUBSTRATE, AND AN ALUMIDE COATING COVERING SAID METALLIC ALLOY LAYER.
Claim 2
Dependent Claim
45 words
A COATED ARTICLE OF MANUFACTURE COMPRISING A SUPERALLOY SUBSTRATE SELECTED FROM THE GROUP CONSISTING OF NICKEL-BASE SUPERALLOYS AND COBALT-BASE SUPERALLOYS, DISPERSION-STRENGTHENED ALLOYS, COMPOSITES, AND DIRECTIONAL EUTECTICS, A DUCTILE, OXIDATION RESISTANT METALLIC ALLOY LAYER COVERING SAID SUBSTRATE, AND AN ALUMIDE COATING COVERING SAID METALLIC ALLOY LAYER.
Claim 3
Dependent Claim
45 words
A coated article of manufacture comprising a superalloy substrate selected from the group consisting of nickel-base superalloys and coablt-base superalloys, dispersion-strengthened alloys, composites, and directional eutectics, a ductile, oxidation resistant metallic alloy layer covering said substrate, and an aluminide coating covering said metallic alloy layer.
Claim 4
Dependent Claim
45 words
A coated article of manufacture comprising a superalloy substrate selected from the group consisting of nickel-base superalloys and coablt-base superalloys, dispersion-strengthened alloys, composites, and directional eutectics, a ductile, oxidation resistant metallic alloy layer covering said substrate, and an aluminide coating covering said metallic alloy layer.
Claim 5
Dependent Claim
17 words
An article of manufacture is claimed in claim 1 wherein the metallic alloy layer comprises a cladding.
Claim 6
Dependent Claim
18 words
An article of manufacture as claimed in claim 2 wherein the metallic alloy layer comprises a foil cladding.
Claim 7
Dependent Claim
33 words
An article of manufacture as claimed in claim 3 wherein the foil cladding is a NiCrAl alloy containing one or more elements selected from the group consisting of Si, Y, Mn, and Th.
Claim 8
Dependent Claim
36 words
An article of manufacture as claimed in claim 4 whereIn the foil cladding is an alloy consisting essentially of from 15 to 25% chromium, 3 to 6% aluminum, 0.5 to 1.5% silicon, and the balance nickel.
Claim 9
Dependent Claim
28 words
An article of manufacture as claimed in claim 5 wherein the alloy consists essentially of about 18% chromium, about 4% aluminum, about 1% silicon, and the balance nickel.
Claim 10
Dependent Claim
33 words
An article of manufacture as claimed in claim 3 wherein the foil cladding is a FeCrAl alloy containing one or more elements selected from the group consisting of Y, Si, Mn, and Ta.
Claim 11
Dependent Claim
36 words
An article of manufacture as claimed in claim 7 wherein the foil cladding is an alloy consisting essentially of from 15 to 25% chromium, 3 to 6% aluminum, 0.1 to 1% yttrium, and the balance iron.
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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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |