JP2007220493A5 - - Google Patents

Claims (7)

A superconducting wire manufacturing precursor used when manufacturing a Nb ₃ Sn superconducting wire, and a superconducting matrix portion in which a plurality of Nb-based filaments made of Nb or Nb-based alloys are arranged in a Cu-Sn base alloy; In the precursor for producing a superconducting wire having stabilized copper at the outer periphery or the center thereof,
A Ti-based filament composed of a core material made of Ti or an NbTi alloy and a barrier layer made of an Nb or Nb-based alloy (but not containing Ti) disposed around the core material is formed of the superconducting matrix portion. Cu-Sn all SANYO that groups a plurality of arranged in the alloy, and the barrier layer is a _Nb 3 Sn generation before the heat treatment step, the thickness of 0.01 m to 50 m, are arranged in a superconducting matrix portion The precursor for producing a Nb ₃ Sn superconducting wire, wherein the plurality of Ti-based filaments have a mutual spacing of 0.1 μm or more and 200 μm or less before the Nb ₃ Sn generation heat treatment . A precursor for producing a superconducting wire used when producing a Nb ₃ Sn superconducting wire, comprising one or a plurality of Nb-based filaments made of Nb or Nb-based alloy in a Cu or Cu-based alloy, and one or In a superconducting matrix portion in which a plurality of Sn or Sn-based alloy cores are arranged and a precursor for producing a superconducting wire having stabilized copper on the outer periphery thereof,
A Ti-based filament composed of a core material made of Ti or an NbTi alloy and a barrier layer made of Nb or an Nb-based alloy (but not containing Ti) arranged around the core material is made of the superconducting matrix portion. all SANYO which is more disposed in a Cu or Cu-based alloy, and the barrier layer is a _Nb 3 Sn generation before the heat treatment step, the thickness of 0.01 m to 50 m, are arranged in a superconducting matrix portion The precursor for producing a Nb ₃ Sn superconducting wire, wherein the plurality of Ti-based filaments have a mutual interval of 0.1 μm or more and 200 μm or less before the Nb ₃ Sn generation heat treatment . The ratio of the Ti-based filaments to the Nb-based filaments disposed in the superconducting matrix portion is 0.01 to 0.30 in terms of the cross-sectional area ratio (total cross-sectional area of Ti-based filaments / total cross-sectional area of Nb filaments). The precursor for producing a Nb ₃ Sn superconducting wire according to claim 1 or 2 . The precursor for manufacturing a superconducting wire according to any one of claims 1 to 3 , wherein a diffusion barrier layer is disposed between the superconducting matrix portion and the stabilized copper. A method for producing a Nb ₃ Sn superconducting wire comprising forming a Nb ₃ Sn-based superconducting phase by subjecting the precursor for producing a superconducting wire according to any one of claims 1 to 4 to Nb ₃ Sn generation heat treatment. . In producing a Nb ₃ Sn superconducting wire using the superconducting wire producing precursor according to any one of claims 1, 3 , 4 and 4 , after performing extrusion or wire drawing, a temperature range of 400 to 650 ° C. A method for producing a Nb ₃ Sn superconducting wire, wherein an Nb ₃ Sn-based superconducting phase is formed by performing annealing heat treatment, repeating processing and annealing a plurality of times, and then performing Nb ₃ Sn generation heat treatment. In producing a Nb ₃ Sn superconducting wire using the precursor for producing a superconducting wire according to any one of claims 2 to 4 , after performing extrusion or wire drawing, annealing heat treatment in a temperature range of 100 to 220 ° C. And a Nb ₃ Sn superconducting phase is then formed by performing a Nb ₃ Sn generation heat treatment, and a method for producing a Nb ₃ Sn superconducting wire.