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Bi-2223 tapes; transverse compressive stress; side compressive stress
Abstract:
We measured the critical current of Bi-2223 tapes as a function of transverse compressive stress perpendicular to the tape surface and side compressive stress parallel to the tape surface at 77 K. The effects of the cross-section size on the stress characteristics of AgMn-alloy sheathed Bi-2223 tapes were compared. The onset compressive stress for degradation of I, was lower in the thinner tape with a thin Ag sheath due to the stress concentration on the irregular interface. The irreversible transverse compressive stress and side compressive stress of the tapes with AgMn-alloy sheath were usually higher than 100 M Pa, which essentially meet the requirements of technical application. (C) 2007 Elsevier B.V. All rights reserved.
