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Title: Improved superconducting magnet wire

This invention is directed to a superconducting tape or wire composed of alternating layers of copper and a niobium-containing superconductor such as niobium of NbTi, Nb/sub 3/Sn or Nb/sub 3/Ge. In general, each layer of the niobium-containing superconductor has a thickness in the range of about 0.05 to 1.5 times its coherence length (which for Nb/sub 3/Si is 41 A) with each copper layer having a thickness in the range of about 170 to 600 A. With the use of very thin layers of the niobium composition having a thickness within the desired range, the critical field (H/sub c/) may be increased by factors of 2 to 4. Also, the thin layers of the superconductor permit the resulting tape or wire to exhibit suitable ductility for winding on a magnet core. These compositions are also characterized by relatively high values of critical temperature and therefore will exhibit a combination of useful properties as superconductors.
Authors:
;
Publication Date:
OSTI Identifier:
7183238
DOE Contract Number:
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; SUPERCONDUCTING CABLES; PATENTS; COPPER; DUCTILITY; GERMANIUM ALLOYS; LAYERS; NIOBIUM ALLOYS; SUPERCONDUCTORS; THICKNESS; TIN ALLOYS; TITANIUM ALLOYS; ALLOYS; CABLES; CONDUCTOR DEVICES; DIMENSIONS; DOCUMENT TYPES; ELECTRIC CABLES; ELECTRICAL EQUIPMENT; ELEMENTS; EQUIPMENT; MECHANICAL PROPERTIES; METALS; TENSILE PROPERTIES; TRANSITION ELEMENTS 700202* -- Fusion Power Plant Technology-- Magnet Coils & Fields; 420201 -- Engineering-- Cryogenic Equipment & Devices