US3857173A
Expired / Lapsed
US
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Method of producing a composite superconductor
Assignee: DIRECTOR OF NAT RES INST FOR M
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Filing: 1973-06-22
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Granted: 1974-12-31
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Expires: 1993-06-22
Abstract
Abstract Superconductor including V3Ga or V3Si is disclosed. Superconductor including V3Ga or V3Si is produced by firstly making a composite of a vanadium core metal and a copper, silver or copper-silver alloy containing gallium or silicon, fabricating the composite to a desirable shape, followed by heat treatment. The vanadium core may contain titanium, zirconium or hafnium.
Inventors
- 👤 K Tachikawa
- 👤 Y Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:55
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/917; Y10S505/918; Y10S505/919; Y10S505/921; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A METHOD OF PRODUCING A SUPERCONDUCTOR ELEMENT HAVING AN OUTER PROTECTIVE LAYER, WHEREIN SAID ELEMENT INCLUDES A SUPERCONDUCTOR SELECTED FROM THE GROUP CONSISTING OF V3GA AND V3SI SUPERCONDUCTORS, WHICH COMPRISES THE STEPS OF: PROVIDING AN ELONGATED COMPOSITE MEMBER HAVING AN OUTER SHEATH COMPRISING A MATERIAL SELECTED FROM A FIRST GROUP OF MATERIALS CONSISTING OF COPPER, SILVER AND A COPPER-SILVER ALLOY, EACH OF THEM CONTAINING 0.1 TO 30 ATOMIC PERCENT GALLIUM OR 0.1 TO 10 ATOMIC PERCENT SILICON, AND HAVING A CORE MATERIAL ENCOMPASSED BY SAID OUTER SHEATH AND SELECTED FROM A SECOND GROUP OF MATERIALS CONSISTING OF A VANADIUM ALLOY CONTAINING 0.1 TO 10 ATOMIC PERCENT TITANIUM, ZIRCONIUM OR HAFNIUM, AND SUBJECTING SAID COMPOSITE MEMBER TO A HEAT TREATMENT TO PROVIDE SAID SUPERCONDUCTOR OF V3GA OR V3SI HAVING A SAID PROTECTIVE LAYER COMPRISING SAID MATERIAL SELECTED FROM SAID FIRST GROUP.
Claim 2
Independent Claim
140 words
A METHOD OF PRODUCING A SUPERCONDUCTOR ELEMENT HAVING AN OUTER PROTECTIVE LAYER, WHEREIN SAID ELEMENT INCLUDES A SUPERCONDUCTOR SELECTED FROM THE GROUP CONSISTING OF V3GA AND V3SI SUPERCONDUCTORS, WHICH COMPRISES THE STEPS OF: PROVIDING AN ELONGATED COMPOSITE MEMBER HAVING AN OUTER SHEATH COMPRISING A MATERIAL SELECTED FROM A FIRST GROUP OF MATERIALS CONSISTING OF COPPER, SILVER AND A COPPER-SILVER ALLOY, EACH OF THEM CONTAINING 0.1 TO 30 ATOMIC PERCENT GALLIUM OR 0.1 TO 10 ATOMIC PERCENT SILICON, AND HAVING A CORE MATERIAL ENCOMPASSED BY SAID OUTER SHEATH AND SELECTED FROM A SECOND GROUP OF MATERIALS CONSISTING OF A VANADIUM ALLOY CONTAINING 0.1 TO 10 ATOMIC PERCENT TITANIUM, ZIRCONIUM OR HAFNIUM, AND SUBJECTING SAID COMPOSITE MEMBER TO A HEAT TREATMENT TO PROVIDE SAID SUPERCONDUCTOR OF V3GA OR V3SI HAVING A SAID PROTECTIVE LAYER COMPRISING SAID MATERIAL SELECTED FROM SAID FIRST GROUP.
Claim 3
Dependent Claim
55 words
A method as set forth in claim 1, in which prior to said heat treating step one or more of the said composites are coated with a conductor selected from the group consisting of copper, silver and aluminum, and the resulting coated member is subjected to plastic deformation to form it into a desired shape.
Claim 4
Dependent Claim
52 words
A method of producing a superconductor element as set forth in claim 1, wherein said step of providing an elongated composite is performed by providing a plurality of parallel rods of said material of said second group within said outer sheath of material of said first group which thereby encompasses said rods.
Claim 5
Independent Claim
121 words
A method of producing a superconductor element having an outer protective layer, wherein said element includes a superconductor of V3Ga, comprising the steps of providing a composite of a sheath comprising a member selected from a first group consisting of copper, silver and a copper-silver alloy, each of them containing 0.1 to 30 atomic percent gallium, and a core metal selected from a second group consisting of a vanadium alloy containing 0.1 to 10 atomic percent titanium, zirconium or hafnium, subjecting said composite to plastic deformation to form it into a desired shape, and subjecting the thus formed composite to a heat treatment at 500* to 950*C to form a compound layer of V3Ga between the core metal and said sheath.
Claim 6
Independent Claim
121 words
A method of producing a superconductor element having an outer protective layer, wherein said element includes a superconductor of V3Ga, comprising the steps of providing a composite of a sheath comprising a member selected from a first group consisting of copper, silver and a copper-silver alloy, each of them containing 0.1 to 30 atomic percent gallium, and a core metal selected from a second group consisting of a vanadium alloy containing 0.1 to 10 atomic percent titanium, zirconium or hafnium, subjecting said composite to plastic deformation to form it into a desired shape, and subjecting the thus formed composite to a heat treatment at 500* to 950*C to form a compound layer of V3Ga between the core metal and said sheath.
Claim 7
Dependent Claim
22 words
A method as set forth in claim 4, in which the heat treatment is effected for from 5 minutes to 100 hours.
Claim 8
Independent Claim
121 words
A method of producing a superconductor element having an outer protective layer, wherein said element includes a superconductor of V3Si comprising the steps of providing a composite of a sheath comprising a member selected from a first group consisting of copper, silver and a copper-silver alloy, each of them containing 0.1 to 10 atomic percent silicon, and a core metal selected from a second group consisting of a vanadium alloy containing 0.1 to 10 atomic percent titanium, zirconium or hafnium, subjecting said composite to plastic deformation to form it into a desired shape, and subjecting the thus formed composite to a heat treatment at 600* to 1,200*C to form a compound layer of V3Si between the core metal and said sheath.
Claim 9
Independent Claim
121 words
A method of producing a superconductor element having an outer protective layer, wherein said element includes a superconductor of V3Si comprising the steps of providing a composite of a sheath comprising a member selected from a first group consisting of copper, silver and a copper-silver alloy, each of them containing 0.1 to 10 atomic percent silicon, and a core metal selected from a second group consisting of a vanadium alloy containing 0.1 to 10 atomic percent titanium, zirconium or hafnium, subjecting said composite to plastic deformation to form it into a desired shape, and subjecting the thus formed composite to a heat treatment at 600* to 1,200*C to form a compound layer of V3Si between the core metal and said sheath.
Claim 10
Dependent Claim
22 words
A method as set forth in claim 6, in which the heat treatment is effected fOr from 5 minutes to 100 hours.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |