US4729801A
Expired / Lapsed
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Process for producing superconducting compound tape or wire material by electron beam irradiation
Assignee: National Institute for Materials Science
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Filing: 1986-07-30
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Granted: 1988-03-08
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Expires: 2006-07-30
Abstract
Abstract A process for producing a superconducting compound tape or wire material, which comprises irradiating electron beams at an acceleration voltage of 5 to 150 KV on a starting tape or wire material consisting essentially of constituent elements of a superconducting compound, a compound between the constituent elements, and/or an alloy between the constituent elements at a power density, determined on the starting tape or wire material, of 1x103 to 1x107 W/cm2 while the starting tape or wire material is moved at a rate of 1 cm to 10 m/sec relative to the electron beams.
Inventors
- 👤 Kazumasa Togano
- 👤 Hiroaki Kumakura
- 👤 Hirosada Irie
- 👤 Susumu Tsukamoto
- 👤 Kyoji Tachikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:48
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0128; H10N60/0184; H10N60/0212; H10N60/0241; H10N60/0884; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815; Y10S505/823
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A process for producing a superconductiong compound tape or wire material, which comprises irradiating electron beams at an acceleration voltage of 5 to 150 KV on a starting tape or wire material consisting essentially of constituent elements of a superconducting compound, a compound between the constituent elements, an alloy between the constituent elements or a mixture of at least two of said elements, said compound between the constituent elements and said alloy at a power density, determined on the starting tape or wire material, of 1×10 3 to 1×10 7 w/cm 2 while the starting material is moved at a rate of 1 cm to 10 cm/sec relative to the electron beams.
Claim 2
Dependent Claim
112 words
A process for producing a superconductiong compound tape or wire material, which comprises irradiating electron beams at an acceleration voltage of 5 to 150 KV on a starting tape or wire material consisting essentially of constituent elements of a superconducting compound, a compound between the constituent elements, an alloy between the constituent elements or a mixture of at least two of said elements, said compound between the constituent elements and said alloy at a power density, determined on the starting tape or wire material, of 1×10 3 to 1×10 7 w/cm 2 while the starting material is moved at a rate of 1 cm to 10 cm/sec relative to the electron beams.
Claim 3
Dependent Claim
98 words
The process of claim 1 wherein the starting tape or wire material is a tape or wire material obtained by inserting into a tube a powdery composition consisting essentially of a powder of the constituent elements of a superconducting compound, a powder of the compound between the constituent elements, a powder of the alloy between the constituent elements or a mixture of at least two of said powders of the constituent elements, said powder of the compound and said powder of the alloy and working the tube having the powder composition, or by molding the powdery composition directly.
Claim 4
Dependent Claim
16 words
The process of claim 2 wherein the tube is a tube of Nb, Ta or Mo.
Claim 5
Dependent Claim
47 words
The process of claim 2 wherein the tape or wire material is heat-treated at 400° to 2000° C. for 10 seconds to 10 hours before the irradiation of electron beams or at 300° to 1000° C. for 1 to 500 hours after the irradiation of electron beams.
Claim 6
Dependent Claim
94 words
The process of claim 1 wherein the starting tape or wire material is a tape or wire material obtained by causing a molten material consisting essentially of a constituent element of a superconducting compound or an alloy or compound of constituent elements to penetrate voids in a sintered body of a powder consisting essentially of at least one other constituent element of the superconducting compound, or the interstices of a bundle of fine wires consisting essentially of the other constituent elements or an alloy between such constituent elements, and fabricating the resulting composite material.
Claim 7
Dependent Claim
21 words
The process of claim 5 wherein the superconducting compound is a A-15 type superconducting compound or a Chevrel type superconducting compound.
Claim 8
Dependent Claim
48 words
The process of claim 5 wherein the sintered body or the fine wires are a sintered body of Nb or fine wires of Nb, and the molten material is a molten mass of at least one element selected from the group consisting of Al, Ge, Si and Ga.
Claim 9
Dependent Claim
49 words
The process of claim 5 wherein the sintered body or the fine wires are a sintered body of Mo or fine wires of Mo, and the molten material is a molten mass of S and at least one element selected from the group consisting of Pb, Sn and Cu.
Claim 10
Dependent Claim
45 words
The process of claim 5 wherein the wire material is heat-treated at 400° to 2000° C. for 10 seconds to 10 hours before the irradiation of electron beams or at 300° to 1000° C. for 1 to 500 hours after the irradaition of electron beams.
Claim 11
Dependent Claim
48 words
The process of claim 2, wherein the tape or wire material is heat-treated at 400° to 2000° C. for 10 seconds to 10 hours before the irradiation of electron beams and at 300° C. to 1000° C. for 1 to 500 hours after the irradiation of electron beams.
Claim 12
Dependent Claim
49 words
The process of claim 5 wherein the tape or wire material is heat-treated at 400° C. to 2000° C. for 10 seconds to 10 hours before the irradiation of electron beams and at 300° C. to 1000° C. for 1 to 500 hours after the irradiation of electron beams.
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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |