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公开(公告)号：US11562836B2
公开(公告)日：2023-01-24
申请号：US16092231
申请日：2017-03-10
申请人： HITACHI, LTD.
发明人： Motomune Kodama , Shigeho Tanigawa , Hiroshi Kotaki , Hideki Tanaka , Kazuya Nishi , Takaaki Suzuki
摘要： The present invention is intended to increase the critical current density of a wire rod having a shape with good symmetry such as a round wire or a square wire by making use of mechanical milling method. The production method of the present invention for the MgB2 superconducting wire rod comprises a mixing process of preparing a powder by adding a solid organic compound to a magnesium powder and a boron powder and then applying an impact to the powder to prepare a mixture of the powder in which boron particles are dispersed inside magnesium particles, a filling process of filling a metal tube with the mixture, an elongation process of elongating the metal tube filled with the mixture and a heat treatment process of heat-treating the metal tube to synthesize MgB2.
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公开(公告)号：US20230016999A1
公开(公告)日：2023-01-19
申请号：US17782512
申请日：2020-12-04
发明人： Daisuke ASAMI , Kota KATAYAMA , Masahiro SUGIMOTO , Hideki II , Hisaki SAKAMOTO , Tomoya KATO
摘要： A precursor for Nb3Sn 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. The Sn-based wire rod contains a matrix phase and at least one kind of hard phases that is harder than the matrix phase. In a cross section parallel to a longitudinal direction of the precursor for Nb3Sn 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.
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公开(公告)号：US11417445B2
公开(公告)日：2022-08-16
申请号：US16861525
申请日：2020-04-29
IPC分类号： H01B12/00 , H01B12/10 , H01L39/14 , H01L39/24 , B21C3/04 , C22C27/02 , C22F1/18 , H01B1/02 , H01B13/00
摘要： In various embodiments, superconducting wires feature assemblies of clad composite filaments and/or stabilized composite filaments embedded within a wire matrix. The wires may include one or more stabilizing elements for improved mechanical properties.
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公开(公告)号：US11127514B2
公开(公告)日：2021-09-21
申请号：US15746871
申请日：2015-07-24
申请人： Hitachi, Ltd.
发明人： Hideki Tanaka , Kazuya Nishi , Takaaki Suzuki , Yota Ichiki
IPC分类号： H01B12/10 , G01R33/3815 , H01F6/06 , H01B12/04 , C01B35/04
摘要： It is an object of the present invention to provide an MgB2 wire helping to achieve compatibility between the ease with which superconducting connection is effected and thermal stability. A superconducting wire according to the present invention includes: an elemental wire formed of MgB2; and a first metal not reacting with Mg. In a section orthogonal to the longitudinal direction of the superconducting wire, the region extending from the center of the superconducting wire to the installation position of the elemental wire is formed by the elemental wire and the first metal.
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公开(公告)号：US20210012930A1
公开(公告)日：2021-01-14
申请号：US16980006
申请日：2019-03-20
发明人： Hideaki Sakurai , Eiji Komai
摘要： A method of manufacturing an insulated superconducting wire material comprising the steps of: removing a flux (S01) by heating a superconducting wire material at a temperature equals to or higher than a flux volatilization temperature and equals to or lower than a heatproof temperature of the superconducting wire material, the superconducting wire material comprising a channel with a channel groove and a superconducting core wire material accommodated in the channel groove of the channel, and the channel groove and the superconducting core wire material being bonded with a solder including the flux; and forming an insulated superconducting wire material (S02) of forming an insulating film on a surface of the superconducting wire material.
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公开(公告)号：US20200251254A1
公开(公告)日：2020-08-06
申请号：US16652055
申请日：2019-02-08
发明人： Taeyoung PYON
IPC分类号： H01B12/10
摘要： A method for manufacturing a superconductor is described. A metal assembly precursor can be formed within a hollow copper support element. Forming the metal assembly precursor within a hollow copper support element by positioning a plurality of conductor elements about a core including Sn to provide a first plurality of inner interstitial spaces between the plurality of conductor elements between the core and conductor elements and a second plurality of outer interstitial spaces between the hollow copper support element and the core, the plurality of conductor elements including unreacted Nb. The metal assembly precursor can be reduced via cold drawing to produce a reduced metal assembly. The reduced metal assembly can be reaction heat treated so that the unreacted Nb undergoes a phase transformation to a reacted superconductor.
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公开(公告)号：US10546669B2
公开(公告)日：2020-01-28
申请号：US16295725
申请日：2019-03-07
申请人： David B. Smathers , Paul Aimone
发明人： David B. Smathers , Paul Aimone
摘要： In various embodiments, superconducting wires incorporate diffusion barriers composed of Nb alloys or Nb—Ta alloys that resist internal diffusion and provide superior mechanical strength to the wires.
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公开(公告)号：US20190267161A1
公开(公告)日：2019-08-29
申请号：US16307937
申请日：2017-05-18
发明人： Tabea Arndt
IPC分类号： H01B12/10 , H02K3/30 , H02K3/34 , H02K15/12 , H01F27/28 , H01F27/32 , H01B1/02 , H02K1/22 , H02K1/12
摘要： Various embodiments may include an electric conductor for producing a stator winding of a stator of an electric machine comprising: a plurality of filaments of a material normally conductive at 4.2 K; and a normally conductive matrix material. The plurality of filaments are embedded in the matrix material to form a monolithic composite. The matrix material is more electrically resistive than the filaments.
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公开(公告)号：US20190066877A1
公开(公告)日：2019-02-28
申请号：US16119693
申请日：2018-08-31
申请人： Alexander Otto
发明人： Alexander Otto
摘要： A high temperature superconducting joint, a high temperature superconducting wire or tape comprising a high temperature superconducting joint, or an MRI or NMR machine comprising a high temperature superconducting wire or tape comprising a high temperature superconducting joint. Also, methods for producing a high temperature superconducting joint for use in a superconducting wire or an MRI or NMR machine, or other high field generating coil.
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公开(公告)号：US20180158577A1
公开(公告)日：2018-06-07
申请号：US15890094
申请日：2018-02-06
发明人： Xingchen XU , Michael D. SUMPTION , Xuan PENG
IPC分类号： H01B12/10 , H01L39/24 , H01L39/14 , H01F6/06 , H01B13/00 , B22F5/12 , C22F1/18 , C22C1/04 , B22F7/04 , C22C32/00
CPC分类号： H01B12/10 , B22F5/12 , B22F7/04 , C22C1/0491 , C22C32/0031 , C22F1/18 , H01B13/0016 , H01F6/06 , H01L39/14 , H01L39/2409
摘要： Disclosed herein are superconducting wires. The superconducting wires can comprise a metallic matrix and at least one continuous subelement embedded in the matrix. Each subelement can comprise a non-superconducting core, a superconducting layer coaxially disposed around the non-superconducting core, and a barrier layer coaxially disposed around the superconducting layer. The superconducting layer can comprise a plurality of Nb3Sn grains stabilized by metal oxide particulates disposed therein. The Nb3Sn grains can have an average grain size of from 5 nm to 90 nm (for example, from 15 nm to 30 nm). The superconducting wire can have a high-field critical current density (Jc) of at least 5,000 A/mm2 at a temperature of 4.2 K in a magnetic field of 12 T. Also described are superconducting wire precursors that can be heat treated to prepare superconducting wires, as well as methods of making superconducting wires.
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