Patent US3655430A successfully refreshed from Google Patents.
US3655430A
Expired / Lapsed
US
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Vapor deposition of alloys
Assignee: RTX Corp
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Filing: 1969-05-21
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Granted: 1972-04-11
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Expires: 1989-05-21
Abstract
Abstract In the coating of substrates with alloys containing elemental constituents characterized by significant differences in melting point and vapor pressure under the coating conditions, the material to be coated is provided as a plurality of individual elements comprising the coating constituents and the timetemperature relationship for each constituent in the melting cycle is adjusted to compensate for the varying degrees of difficulty in vaporizing the respective constituents.
Inventors
- 👤 Wellington N Greaves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:04
CPC Classifications
C; C23; C23C; C23C14/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
In the vacuum vapor deposition of coating alloys from a consumable ingot utilizing an electron beam heat source, the improvement which comprises: forming the ingot as a heterogeneous structure consisting of a side-by-side arrangement of the elemental constituents comprising the coating alloy; arranging the ingot to permit relative movement thereof with respect to the electron beam whereby the beam may be caused to sequentially dwell on each of the elemental constituents; and adjusting the dwell time of the electron beam to provide a greater degree of heating for the hard-to-vaporize constituents and a lesser degree of heating for the more easily vaporized constituents, the heating of the respective constituents being selected to provide a coating alloy vapor cloud of the desired composition.
Claim 2
Dependent Claim
17 words
The improvement according to claim 2 wherein: the ingot is formed in the shape of a ring.
Claim 3
Dependent Claim
27 words
The improvement according to claim 3 wherein: the ingot is caused to rotate beneath a fixed electron beam to permit the beam to traverse the ingot circumferentially.
Claim 4
Dependent Claim
43 words
The improvement according to claim 3 wherein: the elements comprising the ingot are provided in different lengths in the ingot as a function of their ease of vaporization, the more easily vaporized materials having a shorter relative length than the more-difficult-to vaporize materials.
Claim 5
Dependent Claim
72 words
The improvement according to claim 3 wherein: the elements comprising the ingot are provided in different heights in the ingot as a function of their ease of vaporization, the variations in height effecting a focusing-defocusing effect of the electron beam, the respective heights being selected to provide a degree of heating of the individual elements related to their melting point, the more easily vaporized materials being exposed to the more defocused beam.
Claim 6
Dependent Claim
45 words
The improvement according to claim 6 wherein: the elements are also provided in different lengths in the ingot as a function of their ease of vaporization, the height-length relationship of each of the elements being selected to provide a vapor cloud of the desired composition.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |