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Abstract

Superconducting AgNiMg and Ag/Bi-2212 single and multicore wires have been fabricated by the powder in tube method. The optimum heat treatment conditions and the superconducting properties are affected by the sheath material. Reduced critical temperatures have been found for both single and multicore wires with an AgNiMg matrix in the case of furnace cooling, whereas T(c) values as high as 92 K have been reached for air quenched AgNiMg/Bi-2212 multicore wires. These effects may be a consequence of rapid grain boundary assisted oxygen diffusion through the AgNiMg sheath. At 4.2 K and B = 0 short sample critical current densities up to 70000 Acm{-2} and 100000 Acm{-2} have been achieved in AgNiMg and Ag/Bi-2212 monocore wires of 1 mm diameter respectively. Additionally, the effects of axial strain have been investigated and will be discussed.

Additional information

Authors: WESCHE R, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas (CH);FUCHS A M, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas (CH);PASZTOR G, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas (CH)
Bibliographic Reference: Article: Proceedings of the 1996 TMS Annual Meeting Anaheim USA February 4-8, 1996
Record Number: 199610392 / Last updated on: 1996-04-15
Category: PUBLICATION
Original language: en
Available languages: en