Nb3Sn SUPERCONDUCTING WIRE, PROCESS FOR PRODUCING THE SAME, AND SINGLE-CORE COMPOSITE WIRE USED IN PRODUCTION OF Nb3Sn SUPERCONDUCTING WIRE
AssigneeThe University of Tokushima
InventorKiyoshi Inoue
Life of this patent
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Abstract
An Nb3Sn wire rod having a high Jc value is manufactured using an Ag—Sn alloy. A composite rod including a plurality of Nb core materials incorporated in an Ag—Sn alloy matrix material having an Sn concentration of 9.35 to 22.85 at % is prepared. Next, the composite rod is extruded and/or wire drawn while carrying out process annealing of 350 to 490° C., followed by heat treatment at 500 to 900° C. to produce an Nb3Sn filament. Thus, an Nb3Sn extrafine multi-core superconducting wire is manufactured.
Claims19
A method of manufacturing an Nb3Sn superconducting wire, comprising:
- filamentizing a composite in which a core material containing an Nb material is incorporated in a matrix material containing an Ag—Sn alloy;
- and
- heating the composite to form an Nb3Sn filament, wherein
- the composite is filamentized at a temperature at which the Ag—Sn alloy is in a state where an fcc phase and a ζ phase are mixed while adjusting an Sn concentration of the Ag—Sn alloy in such a manner that the Ag—Sn alloy can enter the state where the fcc phase and the ζ phase are mixed, or
- the composite is filamentized at a temperature at which the Ag—Sn alloy is in a state in the ζ phase while adjusting an Sn concentration of the Ag—Sn alloy in such a manner that the Ag—Sn alloy can enter the state in the ζ phase.
A method of manufacturing an Nb3Sn superconducting wire, comprising:
- filamentizing a single-core composite in which a core material containing an Nb material is incorporated in a matrix material containing an Ag—Sn alloy;
- forming a multi-core composite containing a plurality of the filamentized single-core composites;
- filamentizing the multi-core composite;
- and
- heating the multi-core composite to form an Nb3Sn filament, wherein
- the composite is filamentized at a temperature at which the Ag—Sn alloy in an fcc phase and the Ag—Sn alloy in a ζ phase are mixed while adjusting an Sn concentration of the Ag—Sn alloy in such a manner that the Ag—Sn alloy can enter the state where the Ag—Sn alloy in the fcc phase and the Ag—Sn alloy in the ζ phase are mixed, or
- the composite is filamentized at a temperature at which the Ag—Sn alloy is in a state in the ζ phase while adjusting an Sn concentration of the Ag—Sn alloy in such a manner that the Ag—Sn alloy can enter the state in the ζ phase.
A method of manufacturing an Nb3Sn superconducting wire, comprising:
- filamentizing a composite in which a core material containing an Ag—Sn alloy is incorporated in a matrix material containing an Nb material;
- and
- heating the composite to form an Nb3Sn filament, wherein
- the composite is filamentized at a temperature at which the Ag—Sn alloy in an fcc phase and the Ag—Sn alloy in a ζ phase are mixed while adjusting an Sn concentration of the Ag—Sn alloy in such a manner that the Ag—Sn alloy can enter the state where the Ag—Sn alloy in the fcc phase and the Ag—Sn alloy in the ζ phase are mixed, or
- the composite is filamentized at a temperature at which the Ag—Sn alloy is in a state in the ζ phase while adjusting the Sn concentration of the Ag—Sn alloy in such a manner that the Ag—Sn alloy can enter the state in the ζ phase.
A method of manufacturing an Nb3Sn superconducting wire, comprising:
- filamentizing a single-core composite in which a core material containing an Ag—Sn alloy is incorporated in a matrix material containing an Nb material;
- forming a multi-core composite containing a plurality of the filamentized single-core composites;
- filamentizing the multi-core composite;
- and
- heating the multi-core composite to form an Nb3Sn filament, wherein
- the composite is filamentized at a temperature at which the Ag—Sn alloy in an fcc phase and the Ag—Sn alloy in a ζ phase are mixed while adjusting an Sn concentration of the Ag—Sn alloy in such a manner that the Ag—Sn alloy can enter the state where the Ag—Sn alloy in the fcc phase and the Ag—Sn alloy in the ζ phase are mixed, or
- the composite is filamentized at a temperature at which the Ag—Sn alloy is in a state in the ζ phase while adjusting the Sn concentration of the Ag—Sn alloy in such a manner that the Ag—Sn alloy can enter the state in the ζ phase.
An Nb3Sn superconducting wire, comprising:
- a core material containing an Nb material incorporated in a matrix material containing an Ag—Sn alloy in a ζ phase;
- and
- Nb3Sn formed at a boundary between the core material and the Ag—Sn alloy.
An Nb3Sn superconducting wire, which is an Nb3Sn multi-core superconducting wire, comprising:
- a plurality of core materials each containing an Nb material incorporated in a matrix material containing an Ag—Sn alloy in a ζ phase;
- and
- Nb3Sn formed at a boundary between each of the core materials and the Ag—Sn alloy.
An Nb3Sn superconducting wire, comprising:
- a core material containing an Ag—Sn alloy in a ζ phase incorporated in a matrix material containing an Nb material;
- and
- Nb3Sn formed at a boundary between the core material and the Nb material.
An Nb3Sn superconducting wire, which is an Nb3Sn multi-core superconducting wire, comprising:
- a plurality of core materials each containing an Ag—Sn alloy in a ζ phase incorporated in a matrix material containing an Nb material;
- and
- Nb3Sn formed at a boundary between each of the core materials and the Nb material.
A single-core composite wire, which is a single-core composite wire for manufacturing an Nb3Sn multi-core superconducting wire, comprising a core material containing an Nb material incorporated in a matrix material containing an Ag—Sn alloy in a ζ phase.
A single-core composite wire, which is a single-core composite wire for manufacturing an Nb3Sn multi-core superconducting wire, comprising a core material containing an Ag—Sn alloy in a ζ phase incorporated in a matrix material containing an Nb material.
Dependencies are inferred from the claim text.