US4664933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of A-15 type superconductor compound
Assignee: National Institute for Materials Science
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Filing: 1985-12-11
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Granted: 1987-05-12
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Expires: 2005-12-11
Abstract
Abstract An A-15 type superconductor compound having the composition A3B composed of niobium (element A) and at least one element (B) selected from gallium, aluminum and germanium is produced by coating at least one element B on a substrate of niobium, heat-treating the coated niobium substrate at a temperature of 500 DEG to 2,000 DEG C. for 1 second to 300 hours to form intermetallic compounds of niobium and the coated element which are richer in element B than A-15 A3B compound, and thereafter subjecting the substrate to the irradiation of high density energy beams such as electron beams or laser beams to form the A-15 type superconductor compound having the composition A3B.
Inventors
- 👤 Kyoji Tachikawa
- 👤 Kazumasa Togano
- 👤 Hiroaki Kumakura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:25
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; H10N60/0884; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815; Y10S505/818
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A process for producing an A-15 type superconductor compound having the composition A 3 B composed of niobium (element A) and at least one element (B) selected from the group consisting of gallium, aluminum and germanium, which comprises a step of coating at least one element B on a substrate of niobium, a step of heat-treating the coated substrate at a temperature of 500° to 2,000° C. for 1 second to 300 hours to form intermetallic compounds of niobium and the element B on the substrate, and then subjecting the coated substrate having the intermetallic compounds formed thereon to irradiation of high energy density beams to form the A-15 type superconductor compound having the composition A 3 B.
Claim 2
Dependent Claim
118 words
A process for producing an A-15 type superconductor compound having the composition A 3 B composed of niobium (element A) and at least one element (B) selected from the group consisting of gallium, aluminum and germanium, which comprises a step of coating at least one element B on a substrate of niobium, a step of heat-treating the coated substrate at a temperature of 500° to 2,000° C. for 1 second to 300 hours to form intermetallic compounds of niobium and the element B on the substrate, and then subjecting the coated substrate having the intermetallic compounds formed thereon to irradiation of high energy density beams to form the A-15 type superconductor compound having the composition A 3 B.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein the step of coating the element B is carried out by immersing the niobium substrate in a molten bath of the element B.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein heat-treating step is carried out at a temperature of 700° to 1,300° C. for a period of 1 minute to 50 hours.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein the the energy density of the beams is 10 3 to 10 6 W/cm 2 .
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the A-15 type superconductor compound is in the form of a long strip.
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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |