PRECURSOR FOR Nb3Sn SINGLE-CORE SUPERCONDUCTING WIRE RODS AND METHOD FOR PRODUCING SAME, Nb3Sn SINGLE-CORE SUPERCONDUCTING WIRE ROD, PRECURSOR FOR Nb3Sn MULTICORE SUPERCONDUCTING WIRE RODS AND METHOD FOR PRODUCING SAME, AND Nb3Sn MULTICORE SUPERCONDUCTING WIRE ROD

Title:

Document Type and Number:

WIPO Patent Application WO/2021/112211

Kind Code:

A1

Abstract:

A precursor (1) for Nb3Sn single-core superconducting wire rods according to the present invention is provided with: an Sn-based wire rod (10); a first Cu-based tube (20) that covers the outer circumferential surface of the Sn-based wire rod; an Nb-based tube (30) that covers the outer surface of the first Cu-based tube; and a second Cu-based tube (40) that covers the outer surface of the Nb-based tube. The Sn-based wire rod comprises a matrix phase (11) and one or more hard phases (12) that are harder than the matrix phase; and in a cross-section of the precursor for Nb3Sn single-core superconducting wire rods, said cross-section being parallel to the longitudinal direction of the precursor, the maximum length of each of the hard phases in the width direction, which is perpendicular to the above-described longitudinal direction, is 50% or less of the minimum length of the Sn-based wire rod in the above-described width direction and/or not more than the minimum thickness of the Nb-based tube in the above-described width direction.

Inventors:

ASAMI DAISUKE (JP)
KATAYAMA KOTA (JP)
SUGIMOTO MASAHIRO (JP)
II HIDEKI (JP)
SAKAMOTO HISAKI (JP)
KATO TOMOYA (JP)

Application Number:

PCT/JP2020/045169

Publication Date:

June 10, 2021

Filing Date:

December 04, 2020

Export Citation:

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Assignee:

FURUKAWA ELECTRIC CO LTD (JP)

International Classes:

H01B13/00; H01B12/04; H01B12/10

Domestic Patent References:

WO2007102517A1

2007-09-13

Foreign References:

JP2007165151A	2007-06-28
JPS5871508A	1983-04-28
JPS6358716A	1988-03-14
JPS62230958A	1987-10-09
JPH03283320A	1991-12-13

Other References: