Fabrication and Electromechanical Characterization of Silver-Clad BSCCO Tapes

Authors: Iyer A.N.¹; Salib S.¹; Mironova M.¹; Vipulanandan C.¹; Balachandran U.²; Salama K.¹

Source: Journal of Superconductivity: Incorporating Novel Magnetism, Volume 11, Number 5, October 1998 , pp. 533-543(11)

Publisher: Springer

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Abstract:

The powder-in-tube technique consisting of industrial processes such as wire drawing and rolling has been widely used to fabricate superconducting tapes. In the present investigation a novel technique was adopted to fabricate BSCCO 2223 tapes. Instead of wire drawing, the silver billet was reduced in size by groove rolling. Stress conditions during groove rolling were analyzed and appropriate changes were incorporated to optimize the deformation process. Subsequent thermomechanical treatment resulted in tapes with average critical current densities of 18,000 A/cm². Phase development and microstructural evolution during the thermomechanical treatment were studied using XRD, SEM, and TEM. The electromechanical properties of monofilament and composite BSCCO tapes were evaluated by subjecting them to in situ tensile tests. The strain tolerance of the composite was found to be better than that of the monofilament BSCCO tape.

Keywords: Groove rolling; powder-in-tube technique; BSCCO; current transport properties; phase development; in situ tensile test; strain tolerance

Language: English

Document Type: Research article

Affiliations: 1: Texas Center for Superconductivity, University of Houston, Houston, Texas 77204-4792 2: Energy Technology Division, Argonne National Laboratory, Argonne, Illinois 60439

Publication date: 1998-10-01