Microstructure and Properties of Simultaneously Processed Nb-Ti and Nb-Ti-Ta Superconducting Wires

  • R. Taillard
  • E. Florianova
  • C. E. Bruzek
  • Hoang-Gia-Ky
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)


The evolution of the microstructure (sub-band size, α phase precipitation) of a Nb-47.1wt%Ti and of a Nb-45 wt%Ti-15wt%Ta alloys is followed during their simultaneous thermomechanical processing. The effects of a Ta addition, cold work prestrain, and of the temperature and duration of heat treatments on the volume fraction, size, density and localization of the particles of α phase are especially documented. Widmanstätten α strengthens the NbTiTa alloy and exerts a deleterious influence on Jc. Some solutions are proposed to these harmful effects. At last, the relationships describing the dependence of the α phase distribution on strain are also considered.


Heat Treatment High Volume Fraction Total Volume Fraction Deleterious Influence Superconducting Wire 
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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • R. Taillard
    • 1
  • E. Florianova
    • 1
  • C. E. Bruzek
    • 2
  • Hoang-Gia-Ky
    • 2
  1. 1.Physical Metallurgy Laboratory, URA CNRS 234University of Lille IVilleneuve d’AscqFrance
  2. 2.GEC Alsthom - IntermagneticsBelfortFrance

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