公开(公告)号：EP4227427A1

公开(公告)日：2023-08-16

申请号：EP21877428.9

申请日：2021-09-29

申请人： FURUKAWA ELECTRIC CO., LTD.

发明人： SUGIMOTO, Masahiro ,  KATAYAMA, Kota ,  II, Hideki ,  KATO, Tomoya

IPC分类号： C22C9/06 ,  C22C27/02 ,  H01B12/10 ,  H01F6/06

摘要： A NbTi superconducting multicore wire includes:
a core portion;
a first barrier layer arranged around the circumference of the core portion and composed of a first copper alloy including at least one element selected from Ni or Mn;
a filament assembly arranged around the circumference of the first barrier layer and including a plurality of NbTi filament assemblies each including a plurality of NbTi filaments, the plurality of NbTi filaments being at least seven NbTi filaments, embedded in a matrix composed of a second copper alloy including at least one element selected from Ni or Mn;
a second barrier layer arranged around the circumference of the filament assembly and composed of the first copper alloy; and
a stabilizing layer arranged around the circumference of the second barrier layer and composed of a metal,
in a transverse cross section perpendicular to a longer direction, the plurality of NbTi filaments in each of the NbTi filament assemblies being arranged in one or more circular shapes each having a different diameter, centering on one NbTi filament; and a plurality of NbTi filaments arranged in a circular shape in an outermost circle being arranged at approximately equal intervals along a circumferential direction.

公开(公告)号：EP4071769A1

公开(公告)日：2022-10-12

申请号：EP20895587.2

申请日：2020-12-04

申请人： FURUKAWA ELECTRIC CO., LTD.

发明人： ASAMI, Daisuke ,  KATAYAMA, Kota ,  SUGIMOTO, Masahiro ,  II, Hideki ,  SAKAMOTO, Hisaki ,  KATO, Tomoya

IPC分类号： H01B13/00 ,  H01B12/04 ,  H01B12/10

摘要： A precursor for Nb 3 Sn single-core superconducting wire includes: a Sn-based wire rod, a first Cu-based tube covering an outer circumferential surface of the Sn-based wire rod, an Nb-based tube covering an outer surface of the first Cu-based tube, and a second Cu-based tube covering an outer surface of the Nb-based tube, in which the Sn-based wire rod contains a matrix phase and at least one kind of hard phases that is harder than the matrix phase; and in a cross section parallel to a longitudinal direction of the precursor for Nb 3 Sn single-core superconducting wire, a maximum dimension of the hard phases in a width direction perpendicular to the longitudinal direction is 50% or less of a minimum dimension in the width direction of the Sn-based wire rod and/or is equal to or smaller than a minimum thickness in the width direction of the Nb-based tube.