Improvement of strain dependent critical current in Ag- and Ag/Cu-sheathed Bi(2223) superconducting tapes

Dorr M, Eversmann K, Fischer K, Hütten A, Staiger T (1996)
Czechoslovak Journal of Physics 46: 1689-1690.

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Applications of Bi(2223) tapes in superconducting devices require a reduction of critical current degradation induced by mechanical or thermal stress. Critical currents have been measured dependent on thermocycles and axial strain. The monofilament Ag-sheathed tapes show a degradation of 10% at a critical strain epsilon=0.3%, while multifilament tapes are nearly stable to epsilon=0.6%. A considerable improvement could be reached using Ag90Cu10 sheathes. In opposite to the abrupt irreversible degradation in Ag-sheathed tapes the process in Cu hardened tapes is more gradual and the critical E-values are doubled approximately. Micrographs show that microcracks are the reason for the critical current degradation. Their density is dependent on core properties.
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Dorr M, Eversmann K, Fischer K, Hütten A, Staiger T. Improvement of strain dependent critical current in Ag- and Ag/Cu-sheathed Bi(2223) superconducting tapes. Czechoslovak Journal of Physics. 1996;46:1689-1690.
Dorr, M., Eversmann, K., Fischer, K., Hütten, A., & Staiger, T. (1996). Improvement of strain dependent critical current in Ag- and Ag/Cu-sheathed Bi(2223) superconducting tapes. Czechoslovak Journal of Physics, 46, 1689-1690.
Dorr, M., Eversmann, K., Fischer, K., Hütten, A., and Staiger, T. (1996). Improvement of strain dependent critical current in Ag- and Ag/Cu-sheathed Bi(2223) superconducting tapes. Czechoslovak Journal of Physics 46, 1689-1690.
Dorr, M., et al., 1996. Improvement of strain dependent critical current in Ag- and Ag/Cu-sheathed Bi(2223) superconducting tapes. Czechoslovak Journal of Physics, 46, p 1689-1690.
M. Dorr, et al., “Improvement of strain dependent critical current in Ag- and Ag/Cu-sheathed Bi(2223) superconducting tapes”, Czechoslovak Journal of Physics, vol. 46, 1996, pp. 1689-1690.
Dorr, M., Eversmann, K., Fischer, K., Hütten, A., Staiger, T.: Improvement of strain dependent critical current in Ag- and Ag/Cu-sheathed Bi(2223) superconducting tapes. Czechoslovak Journal of Physics. 46, 1689-1690 (1996).
Dorr, M, Eversmann, K, Fischer, K, Hütten, Andreas, and Staiger, T. “Improvement of strain dependent critical current in Ag- and Ag/Cu-sheathed Bi(2223) superconducting tapes”. Czechoslovak Journal of Physics 46 (1996): 1689-1690.
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