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Abstract

In the last few years Bi-2212/Ag monocore and multicore wires have been developed. The influence of the phase composition of the initial Bi-2212 powders on the critical current densities in the wires has been investigated. The effects of filament diameter and sheath thickness on the optimum heat treatment conditions have been studied in the case of Bi-2212/Ag monocore wires. To get deeper insight in the factors limiting the critical current density in the wires, the microstructure has been examined by optical and scanning electron microscopy. The field and the temperature dependencies of the critical current density are discussed. Strain effects are considered and the results for Bi-2212 Ag single and multicore wires compared. Strain efforts are of importance since magnet conductors experience large hoop stresses and should be able to withstand axial tensile strains of 0.4% without degradation of the critical current density.

Additional information

Authors: WESCHE R, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches enPhysique des Plasmas (CH);FUCHS A M, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches enPhysique des Plasmas (CH);JAKOB B, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches enPhysique des Plasmas (CH)
Bibliographic Reference: Article: Studies of High Temperature Superconductors (1996)
Record Number: 199610091 / Last updated on: 1996-02-16
Category: PUBLICATION
Original language: en
Available languages: en
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