Advertisement

Preparation and Properties of In Situ Prepared Filamentary Nb3Sn-Cu Superconducting Wire

  • D. K. Finnemore
  • J. D. Verhoeven
  • E. D. Gibson
  • J. E. Ostenson
Part of the Cryogenic Materials Series book series (CRYMS)

Abstract

Several years ago we began a project to make superconducting wire by directionally solidifying Cu-Nb binary alloys so as to give an aligned array of Nb dendrites in a copper matrix. These composites were to be drawn to wire, coated with tin and heat treated to produce aligned Nb3Sn filaments in a bronze matrix. Initial studies, however, showed that directional freezing was not required to produce alignment of the Nb dendrites; the wire drawing process itself produced excellent alignment of the initially random array of Nb dendrites produced by conventional casting techniques. This method of fabricating Nb-Sn-Cu wire, which has been developed independently by Bevk et al.1 at Harvard and by Roberge and Foner et al.2 at the Hydro-Quebec Research Institute and MIT, has come to be called the in-situ technique for preparing Cu-Nb-Sn superconductor wire. In this paper we present a brief review of our results at the Ames Laboratory on the development of this in-situ process.

Keywords

Wire Drawing Hydrostatic Extrusion Diameter Billet Bronze Matrix Wire Drawing Process 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. P. Harbison and J. Bevk: J. Appl. Phys. 48:5180 (1977); J. Bevk and J. P. Harbison, J. Mat. Sci. 14: 1457 (1979).Google Scholar
  2. 2.
    S. Foner, E. J. McNiff, Jr., B. B. Schwartz and R. Roberge: Appl. Phys. Lett. 31:853 (1977); R. Roberge, S. Foner, E. J. McNiff, Jr. and B. B. Schwartz, Appl. Phys. Lett. 34: 111 (1979).CrossRefGoogle Scholar
  3. 3.
    J. D. Verhoeven, D. K. Finnemore, E. D. Gibson, J. E. Ostenson and L. F. Goodrich: Appl. Phys. Lett. 33: 101 (1978).CrossRefGoogle Scholar
  4. 4.
    J. D. Verhoeven and E. D. Gibson: J. Mat. Sci. 13: 1576 (1978).CrossRefGoogle Scholar
  5. 6.
    J. B. Verhoeven, F. A. Schmidt, E. D. Gibson, J. E. Ostenson and D. K. Finnemore: Appl. Phys. Lett. 35: 555 (1979).CrossRefGoogle Scholar
  6. 7.
    J. D. Verhoeven, E. D. Gibson, C. V. Owen, J. E. Ostenson and D. K. Finnemore: Appl. Phys. Lett. 35: 270 (1979).CrossRefGoogle Scholar
  7. 8.
    H. Benz, I. Horvath, K. Kwasnitza, R. K. Maix and G. Meyer: Cryogenics 19: 442 (1979).CrossRefGoogle Scholar
  8. 10.
    P. E. Madsen and R. F. Hills: IEEE Trans. Mag., MAG-15, 181.Google Scholar
  9. 11.
    T. Y. Hsiang and D. K. Finnemore: Sol. State Comm. 33:847 (1979); T. Y. Hsiang and D. K. Finnemore, Phys. Rev. (accepted).Google Scholar
  10. 12.
    J. E. Ostenson, D. K. Finnemore, J. D. Verhoeven and E. D. Gibson: Appl. Phys. Lett, (submitted).Google Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • D. K. Finnemore
    • 1
  • J. D. Verhoeven
    • 1
  • E. D. Gibson
    • 1
  • J. E. Ostenson
    • 1
  1. 1.Ames Laboratory and Physics and M.S.E. Depts.Iowa State UniversityAmesUSA

Personalised recommendations