Tensile strain/transverse compressive stress dependence of critical current in Ag-sheathed Bi(2212) 7-core superconducting wires

K. Katagiri, H. S. Shin, Y. Shoji, N. Ebisawa, K. Watanabe, K. Noto, T. Okada, M. Hiraoka, S. Yuya

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15 Citations (Scopus)

Abstract

The mechanical properties and tensile strain/transverse compressive stress dependence of the critical current /c in Ag-sheathed Bi(2212) 7-core superconducting wires of different constructions were evaluated at a temperature of 4.2 K and a magnetic field of 14 T. The increase in the volume fraction of the superconductor shifted the stress-strain curves upwards. The tensile strain for /c degradation onset was in the range 0.14-0.27%. This strain depends upon the residual compressive strain and the thickness of the superconductor layer. On the other hand, the transverse compressive stress for /c degradation onset was in the range 9-20 MPa. Wires with a thin Ag-sheath layer showed a remarkably low stress for /c degradation onset. There was no well-defined correlation between the onset stress for degradation of /c caused by the tensile stress and that caused by the transverse compressive stress.

Original languageEnglish
Pages (from-to)491-494
Number of pages4
JournalCryogenics
Volume36
Issue number6
DOIs
Publication statusPublished - 1996 Jun

Keywords

  • Ag-sheathed 7-core wires
  • Bi(2212) superconductor
  • Tensile strain
  • Transverse compressive stress

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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