Title:
Ｎｂ３Ｓｎ超伝導線材の製造方法、Ｎｂ３Ｓｎ超伝導線材用の前駆体、及びこれを用いたＮｂ３Ｓｎ超伝導線材
Document Type and Number:
Japanese Patent JP6719141
Kind Code:
B2
Abstract:
In the production of an internal-tin-processed Nb3Sn superconducting wire, the present invention provides a Nb3Sn superconducting wire that is abundant in functionality, such as, the promotion of formation of a Nb3Sn layer, the mechanical strength of the superconducting filament (and an increase in interface resistance), the higher critical temperature (magnetic field), and the grain size reduction, and a method for producing it. A method for producing a Nb3Sn superconducting wire according to an embodiment of the present invention includes a step of providing a bar 10 that has a Sn insertion hole 12 provided in a central portion of the bar 10 and a plurality of Nb insertion holes 14 provided discretely along an outer peripheral surface of the Sn insertion hole 12, and that has an alloy composition being Cu-xZn-yM (x: 0.1 to 40 mass %, M=Ge, Ga, Mg, or Al, provided that, for Mg, x: 0 to 40 mass %), a step of mounting an alloy bar with an alloy composition of Sn-zQ (Q=Ti, Zr, or Hf) into the Sn insertion hole 12 and inserting Nb cores into the Nb insertion holes 14, a step of subjecting the bar 10 to diameter reduction processing to fabricate a Cu-xZn-yM/Nb/Sn-zQ composite multicore wire with a prescribed outer diameter, and a step of subjecting the composite multicore wire to Nb3Sn phase generation heat treatment.
Inventors:
Shinya Banno
Kyoji Tachikawa
Kyoji Tachikawa
Application Number:
JP2019515122A
Publication Date:
July 08, 2020
Filing Date:
February 26, 2018
Export Citation:
Assignee:
National Institute for Materials Science
International Classes:
H01B13/00; C22C9/04; C22C13/00; C22C27/02; C22F1/02; C22F1/08; C22F1/16; H01B12/10
Other References:
伴野信哉、宮本康男、太刀川恭治,Cu合金母材を用いた新しい内部スズ法Nb3Sn線材の研究,2016年春季低温工学・超電導学会,日本,2016年 5月30日,URL,http://www.csj.or.jp/conference/2016s/abs/1C-a03.html
Attorney, Agent or Firm:
Shigerou