(Nb,Ti)3Sn/CU Multifilamentary Superconducting Wire with Nb/Ti and Nb/NbTi Composite Filaments

  • D. Yu
  • K. De Moranville
  • T. Wong
  • J. Wong
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)


Ternary (Nb,Ti)3Sn/Cu multifilamentary high-field superconducting wires with Nb/Ti and Nb/NbTi composite filaments were fabricated via a bronze-route process. The composite filaments, which contain about 1.3 wt.% Ti, were prepared from pure Nb and Ti sheets, or pure Nb and Nb47Ti alloy sheets using a jelly-roll technique. The ternary Al 5 superconducting phase is formed during final heat treatment by diffusion of Sn and Ti through matrix and filaments respectively, and then reaction with Nb. This new approach is designed to improve the workability and piece length as well as to reduce the cost of manufacturing (Nb,Ti)3Sn/Cu superconducting wires. A two-stage reaction heat treatment schedule has been developed to generate high Jc for these ternary A15 superconductors with composite filaments. Non-Cu Jc(12T,0.1μV/cm,4.2K) of~ 670A/mm2 was recorded on the wire with Nb/Nb47Ti composite filaments fabricated using this technique.


Critical Current Density High Magnetic Field Alloy Filament Composite Filament Nb47Ti Alloy 
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  1. 1.
    M. Sucnaga, D.O. Welch, R.L. Sabatini, O.F. Kammerer, and S. Okuda, “Superconducting Critical Temperature, Critical Magnetic Fields, Lattice Parameters, and Chemical Compositions of ‘Bulk’ Pure and Alloyed Nb3Sn Produced by the Bronze Process”, J. Appl. Phys. Vol. 59, No. 3 (1986) 840.CrossRefGoogle Scholar
  2. 2.
    H. Sekinc, Y. Iijima, K. Itoh, K. Tachikawa, Y. Tanaka and Y. Furuto, “Improvements in Current-Carrying Capacities of Nb3Sn Composites in High Fields through Ti Addition”, IEEE Tran, on Magn. Vol. MAG-19 (1983) 1429.CrossRefGoogle Scholar
  3. 3.
    S. Pourrahimi, C.L.H. Thieme and S. Foner, “21 T Powder Metallurgy Processed Nb3Sn (Ti) Using Nb-1.2 wt.% Ti Powders”, IEEE Trans, on Magn. Vol. MAG-23 (1987) 661.CrossRefGoogle Scholar
  4. 4.
    K. Tachikawa, T. Asano and T. Takeuchi, “High Field Superconducting Properties of the Composite-Processed Nb3Sn with Nb-Ti Alloy Cores”, Appl. Phys. Lett., Vol. 39 (1981) 766.CrossRefGoogle Scholar
  5. 5.
    J.D. Livingston, “Effect of Ta Additions to Bronze-Processed Nb3Sn Superconductors”, IEEE Trans, on Magn. Vol. MAG-14 (1978) 611.CrossRefGoogle Scholar
  6. 6.
    S. Foner, E.J. McNiff Jr., G.M. Ozeryansky and R.E. Schwall, “High Field Properties of Multifilamentary (Nb-4 at.%Ta)3Sn”, IEEE Trans, on Magn. Vol. MAG-23 (1987) 984.CrossRefGoogle Scholar
  7. 7.
    G.M. Ozeryansky, E. Gregory and B.A. Zeitlin, “An Improved Method of Introducing Additional Alloying Elements into Nb3Sn”, IEEE Trans, on Appl. Superconductivity, Vol. 3, No. 1 (1993) 1330.CrossRefGoogle Scholar
  8. 8.
    H. Sekine, Y. Iijima, K. Itoh, and K. Tachikawa, “Effects of Titanium Addition to the Matrix of Nb3Sn Composites”, Proc. ICMC 9, Kobe, Japan, pp. 86–89, Butterworths, Guildford, Surrey U.K. 1982.Google Scholar
  9. 9.
    K. Kamata, N. Tada, K. Itoh, and K. Tachikawa, “High-Field Current-Carrying Capacities of’Titanium Bronze’ Processed Multifilamentary Nb3Sn Conductors with Pure and Alloy Cores”, Adv. in Cryo. Eng., Vol. 30 (1984) 771.CrossRefGoogle Scholar
  10. 10.
    L. Coolcy and D.C. Larbalcstier. Low Temperature Superconductivity Materials Workshop, Feb. 4–5, 1991, Tiburón, CA.Google Scholar
  11. 11.
    E. W. Collings, Applied Superconductivity, Vol. 1 (1986) 130.Google Scholar
  12. 12.
    E. Gregory, G.M. Ozeryansky, R.M. Schacdler, H.C. Kanithi, D.W. Hazelton and W.K. Markiewicz, “An Internal Tin Conductor with Nb 1 wt.%Ti Filaments”, Adv. in Cryo. Eng. Vol. 36A (1990) 147.CrossRefGoogle Scholar
  13. 13.
    L. T. Summers, A.R. Duenas, C.E. Kaiiscn, G.M. Ozeryansky and E. Gregory, “A Characterization of Internal Tin Nb3Sn Superconductors for Use in Proof of Principle (POP) Coil”, IEEE Trans, on Magn. Vol. 27, No. 2 (1991) 1763.CrossRefGoogle Scholar
  14. 14.
    K. DeMoranville, D. Yu and J. Wong, “Development of a High Jc Bronze Route Nb3Sn Conductor Using Nb-Ta Composite Filaments”, Advances in Cryogenic Engineering, Vol. 40A (1994) p. 931.Google Scholar
  15. 15.
    K. DeMoranville, D. Yu and J. Wong, “Development of a Niobium-Tin A15 Multifilamentary Superconducting Wire with Artificial Tantalum Inclusions”, IEEE Trans, on Appl. Superconductivity, Vol. 3, No. 1 (1993) 982.CrossRefGoogle Scholar
  16. 16.
    B. B. Goodman, Rep. on Progress in Physics, Vol. 49 (1966) 445.CrossRefGoogle Scholar
  17. 17.
    J. Wong et al. U.S. Patent No. 5,158, 620, 5,160,550, 5,160,794, 5,174,830, 5,174,831, 5,223,348, and 5,230,748.Google Scholar
  18. 18.
    R.M. Scanlan, A. Lictzke, J. Royet, A. Wandcsforde, C.E. Taylor, J. Wong, and M.K. Rudziak, “Evaluation of APC NbTi Superconductor in a Model Dipole Magnet”, IEEE Trans, on Magnetics, Vol. 30 (1994) 1627.CrossRefGoogle Scholar
  19. 19.
    MIT, Appendix A “Technical Specification for the Manufacture of NbSn Superconducting Strand”, in RFP # TWE/293/RF-15, February 2, 1993.Google Scholar
  20. 20.
    LLNL, Performance Specification SK-94–001, Revision 1, June 30, 1994.Google Scholar

Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • D. Yu
    • 1
  • K. De Moranville
    • 1
  • T. Wong
    • 1
  • J. Wong
    • 1
  1. 1.Supercon, Inc.ShrewsburyUSA

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