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A New Technique to Fabricate Multifilament Nb3Sn Superconductor Using Cabled Monocore Subelements

  • D. Yu
  • K. DeMoranville
  • M. Takayasu
  • T. Wong
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 44)

Abstract

Manufacture of multifilamentary Nb3Sn superconducting wires having fine filaments usually involves two subelement stacking and three billet extrusion steps.

A new technique of fabricating multifilamentary wires has been developed to eliminate one subelement stacking and one billet extrusion from the process by using cabled subelements. A bronze route Nb3Sn superconducting wire with ~6,000 filaments of 4 μm diameter was fabricated using seven-strand cabled monocore subelements and compared with the wires produced using the conventional process. The workability of the new wire was excellent. Its critical current densities in magnetic fields and other superconducting performances were identical to that of the conventionally processed wires, and also meet the specifications for an industry standard wire. This technique, which can also be applied to fabricate multifilamentary NbTi superconducting wires, has the potential of reducing fabrication cost of multifilamentary superconducting wires.

Keywords

Critical Current Density Wire Drawing Centrifugally Cast Fine Filament Wire Sample 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. I. S. Okuda, M. Suenaga, and R.L. Sabatini, Influence of metallurgical factors on superconducting current densities in “bronze-processed” Nb3Sn multifilamentary wires, J. Appl. Phvs. 54: 289 (1983).ADSCrossRefGoogle Scholar
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    H. Hillmann, Fabrication technique of superconducting materials in: “Superconductor Materials Scienc”, S. Foner, and B. B. Schwartz, ed., Plenum, New York (1981), p. 275.Google Scholar
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    Vacuumschmelze, Specifications for Superconductor type NS 6000 - Ta I.Google Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • D. Yu
    • 1
  • K. DeMoranville
    • 2
  • M. Takayasu
    • 3
  • T. Wong
    • 1
  1. 1.Supercon, Inc.ShrewsburyUSA
  2. 2.American Superconductor Co.WestboroughUSA
  3. 3.Plasma Science and Fusion Center at MITCambridgeUSA

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