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Investigation of Different Angle Joining of Superconducting Tapes

  • H. K. Liu
  • R. Bhasale
  • S. X. Dou
Part of the Advances in Cryogenic Engineering Materials book series (ACRE, volume 42)

Abstract

Joining of superconducting wires and tapes is of significant importance for fabricating long conductors and for installation of superconductor devices. A technique for joining Ag-sheathed Bi-based superconducting single and multifilament tapes fabricated using a powder-in-tube technique has been developed. A number of joint configurations have been investigated for Ag-sheathed Bi-based superconducting single core and multifilament tapes. When the joining was performed at the final stage of the thermomechanical processes, the transport critical current (Ic) of the Ag-superconductor-superconductor-Ag (Ag-S-S-Ag) joining remains 60–80 % of Ic value of the normal region for single tapes with 0° joining. 45° joining for single core tapes can retain ∼20 % of the Ic of the normal region while 90° joining can hold less than 10% of the Ic of the normal region. The 0° joining for the multifilament holds 40 to 60% of current of the normal regions of the tapes. If the joining is carried out at the first stage of thermomechanical processes, the joint can retain nearly 100% of the Jc. This type of joining is useful to overcome the limitation of the powder-in-tube process. These results suggest that the critical current in the tapes is limited by high angle boundaries since the high angle joining results in a large proportion of high angle boundaries.

Keywords

High Angle Critical Current Critical Current Density Normal Region Thermomechanical 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.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • H. K. Liu
    • 1
  • R. Bhasale
    • 1
  • S. X. Dou
    • 1
  1. 1.Centre for Superconducting and Electronic MaterialsUniversity of WollongongWollongongAustralia

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