US3718962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature metallic diffusion coating
Assignee: General Electric Co
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Filing: 1970-09-28
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Granted: 1973-03-06
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Expires: 1990-09-28
Abstract
Abstract Improved oxidation and sulfidation resistance can be imparted to a high temperature metallic diffusion coating diffusion bonded with metallic surface, such as nickel, cobalt or iron base alloy surface, by embedding in a coating outer portion between about 5 and 50 volume percent of oxide particles of up to about 20 microns in size and thermally stable to at least about 2,000*F.
Inventors
- 👤 D Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/1266; Y10T428/12667; Y10T428/12736; Y10T428/1275; Y10T428/12771; Y10T428/12806
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
165 words
An article having a surface including a diffusion bonded coating of about 1 - 5 mils as-coated of improved resistance to oxidation and sulfidation, comprising: a metallic base portion including a basis metal element; a coating outer portion consisting essentially of intermetallics of the basis element (a) with at least one element selected from the group consisting of Al and Ti and (b) with elements selected from the group consisting of the alloying elements of the base portion, the coating outer portion including about 5 -50 volume percent of embedded oxide particles of about 1 - 20 microns in size and thermally stable at least to about 2,000*F; and a coating inner interdiffusion portion diffusion bonded with both the base portion and the coating outer portion and comprising intermetallics of the basis element (a) with at least one element selected from the group consisting of Al and Ti and (b) with elements selected from the group consisting of the alloying elements of the base portion.
Claim 2
Dependent Claim
165 words
An article having a surface including a diffusion bonded coating of about 1 - 5 mils as-coated of improved resistance to oxidation and sulfidation, comprising: a metallic base portion including a basis metal element; a coating outer portion consisting essentially of intermetallics of the basis element (a) with at least one element selected from the group consisting of Al and Ti and (b) with elements selected from the group consisting of the alloying elements of the base portion, the coating outer portion including about 5 -50 volume percent of embedded oxide particles of about 1 - 20 microns in size and thermally stable at least to about 2,000*F; and a coating inner interdiffusion portion diffusion bonded with both the base portion and the coating outer portion and comprising intermetallics of the basis element (a) with at least one element selected from the group consisting of Al and Ti and (b) with elements selected from the group consisting of the alloying elements of the base portion.
Claim 3
Dependent Claim
67 words
The article of claim 1 in which: the metallic base portion is an alloy based on a basis element selected from the group consisting of Fe, Ni and Co; and the embedded oxide particles are at least one oxide selected from the group consisting of oxides of Al and Ti and are included in the coating outer portion in the amount of 10 - 40 volume percent.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |