Tensile strain/transverse compressive stress dependence of critical current in Ag-sheathed Bi(2212) 7-core superconducting wires
✍ Scribed by K. Katagiri; H.S. Shin; Y. Shoji; N. Ebisawa; K. Watanabe; K. Noto; T. Okada; M. Hiraoka; S. Yuya
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 469 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
The mechanical properties and tensile strain/transverse compressive stress dependence of the critical current I, 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 14T. The increase in the volume fraction of the superconductor shifted the stress-strain curves upwards. The tensile strain for I, 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 I, degradation onset was in the range 9-20 MPa. Wires with a thin Ag-sheath layer showed a remarkably low stress for 1, degradation onset. There was no welldefined correlation between the onset stress for degradation of 1, caused by the tensile stress and that caused by the transverse compressive stress.