Method for manufacturing powder-metallurgy processed Nb3Sn superconducting wire, precursor to powder-metallurgy processed Nb3Sn superconducting wire
AssigneeKabushiki Kaisha Kobe Seiko Sho
InventorsTakayoshi Miyazaki, Takayuki Miyatake, Hiroyuki Kato, Kyoji Zaitsu
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Abstract
A method for manufacturing a powder-metallurgy processed Nb3Sn superconducting wire is provided. In the method, a sheath made of Nb or a Nb alloy is filled with a raw material powder containing Sn. The sheath filled with the raw material powder is subjected to diameter reduction to form a wire. The wire is heat-treated to form a superconducting phase at the internal surface of the sheath. The raw material powder is prepared by adding a Sn powder to a Cu—Sn alloy powder or a Cu—Sn intermetallic compound powder, and is compacted under isotropic pressure.
Claims11
A method for manufacturing a powder-metallurgy processed Nb3Sn superconducting wire, the method comprising the steps of:
- filling a sheath made of Nb or a Nb alloy with a raw material powder containing Sn;
- reducing the diameter of the sheath filled with the raw material powder to form a wire;
- and
- heat-treating the wire to form a superconducting phase at the internal surface of the sheath,
- wherein the raw material powder contains a Cu—Sn alloy powder or a Cu—Sn intermetallic compound powder and a Sn powder, and is compacted under isotropic pressure before the step of filling the sheath.
A precursor to a powder-metallurgy processed Nb3Sn superconducting wire, comprising:
- a sheath made of Nb or a Nb alloy;
- and
- a raw material powder filling the sheath, containing a Cu—Sn alloy powder or a Cu—Sn intermetallic compound powder and a Sn powder,
- wherein the precursor is used in a process for manufacturing a powder-metallurgy processed Nb3Sn superconducting wire, including the steps of reducing the diameter of the precursor to form a wire, and heat-treating the wire to form a superconducting phase at the interface between the sheath and the raw material powder.
Dependencies are inferred from the claim text.