Patent USRE32178E successfully refreshed from Google Patents.
USRE32178E
Expired / Lapsed
US
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Process for producing compound based superconductor wire
Assignee: Mitsubishi Electric Corp
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Filing: 1984-02-07
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Granted: 1986-06-10
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Expires: 2004-02-07
Abstract
Abstract A process for producing a compound-based semiconductor wire having a high mechanical strength and which can be coiled so as to be cooled efficiently. A starting composition is formed by blending at least one metal powder selected from among Nb-based and V-based particles having at least a partial surface coating of an alloy or metal selected from Cu-Sn-based and Ga-based metal layers with at least one of Cu-based, Sn-based, Ga-based, Cu-Sn-based and Cu-Ga-based metal or alloy powder. The cross-sectional area of the composition is reduced followed by a heat treatment. The composition is then drawn into a wire of desired diameter.
Inventors
- 👤 Kiyoshi Yoshizaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:05
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; B; B22; B22F; B22F1/00; B22F1/17; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815; Y10S505/823; Y10S505/825; Y10S505/917; Y10S505/918; Y10S505/919; Y10S505/921; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
A process for producing a Nb 3 Sn or V 3 Ga compound-based superconductor wire comprising the steps of: forming a composition by blending at least one metal powder selected from the group consisting of Nb-based and V-based particles at least part of the surface of which is covered with at least one layer selected from the group consisting of .[.Cu-Sn-based.]. .Iadd., in the case of Nb 3 Sn compound-based superconductor wire, Cu-based and Sn-based, and in the case of V 3 Ga compound-based superconductor wire, Cu-based .Iaddend.and Ga-based, metal layers with at least one metal powder or alloy powder selected from the group consisting of Cu-based, Sn-based, Ga-based, Cu-Sn based and Cu-Ga-based .Iadd.particles.Iaddend.; reducing the cross-sectional area of said composition; heat treating said composition; and drawing the heat-treated composition into a wire.
Claim 2
Dependent Claim
133 words
A process for producing a Nb 3 Sn or V 3 Ga compound-based superconductor wire comprising the steps of: forming a composition by blending at least one metal powder selected from the group consisting of Nb-based and V-based particles at least part of the surface of which is covered with at least one layer selected from the group consisting of .[.Cu-Sn-based.]. .Iadd., in the case of Nb 3 Sn compound-based superconductor wire, Cu-based and Sn-based, and in the case of V 3 Ga compound-based superconductor wire, Cu-based .Iaddend.and Ga-based, metal layers with at least one metal powder or alloy powder selected from the group consisting of Cu-based, Sn-based, Ga-based, Cu-Sn based and Cu-Ga-based .Iadd.particles.Iaddend.; reducing the cross-sectional area of said composition; heat treating said composition; and drawing the heat-treated composition into a wire.
Claim 3
Dependent Claim
43 words
The process according to claim 1 wherein at least part of the surfaces of individual particles of said group consisting of Nb- and V-based metal particles is covered with an alloy layer selected from the group consisting of Cu-Sn-based and Cu-Ga-based alloy layers.
Claim 4
Dependent Claim
80 words
The process according to claim 1 or 2 wherein said metal powder comprises at least one metal powder selected from the group consisting of Nb- and .[.Ga-based.]. .Iadd.v-based .Iaddend.particles at least a part of the surface of which is covered with at least one layer selected from the group consisting of Cu-based, Sn-based, Ga-based, Cu-Sn-based and Cu-Ga-based layers, said particles being further covered with at least one layer selected from the group consisting of Sn-based, Ga-based, Cu-Sn-based and Cu-Ga-based layers.
Claim 5
Dependent Claim
78 words
The process according to claim 1 or 2 wherein said Nb-based and V-based metal particles are blended with particles selected from the group consisting of Cu-based, Cu-Sn-based, Cu-Ga-based particles, Nb-based composite particles, and V-based composite particles by forming individual metal or alloy layers into a desired shape at a temperature of from room temperature to 1050° C. and sintering, whereupon part of all of said metal or alloy layers on surfaces of adjacent metal layers are joined together.
Claim 6
Dependent Claim
76 words
The process according to claim 1 or 2 wherein said Nb-based and V-based metal particles are blended with particles selected from the group consisting of Cu-based, Cu-Sn-based, Cu-Ga-based particles, Nb-based composite particles, and V-based composite particles by extrusion at an extrusion temperature of from room temperature to 1050° C. with an extrusion ratio of more than 2, whereupon part of all of said metal or alloy layers on surfaces of adjacent metal layers are joined together.
Claim 7
Dependent Claim
75 words
The process according to claim 1 or 2 wherein said at least one layer selected from the group consisting of Cu-Sn-based and Cu-Ga-based alloy layers contains a material selected from the group consisting of tin in one of a range of from 0.1 to 14 wt % and from 50 to 100 wt %, and gallium in one of a range of from 0.1 to 25 wt % and from 50 to 100 wt %.
Claim 8
Dependent Claim
25 words
The process according to claim 1 or 2 wherein said step of heat treating comprises sintering in a vacuum to form a metallurgically integral bar.
Claim 9
Dependent Claim
17 words
The process according to claim 1 or 2 wherein said step of heat treating comprises hot extrusion.
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