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High performance superconducting Y-Ba-Cu-O tapes produced by oxidation of metallic precursors

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4 Author(s)
Long, N.J. ; Ind. Res. Ltd., Lower Hutt, New Zealand ; Buckley, R.G. ; Pringle, D. ; Otto, A.

A metallic precursor fabrication route has been developed for the production of multifilamentary tapes of textured YBa2Cu3 O7-δ in a silver matrix. The number of filaments in prototype tapes ranged from 10 to 1024 with filament thickness from 1 to 40 microns. Following low temperature oxidation of the metallic precursor, we explored conditions for YBa2Cu3O7-δ formation similar to those used in the growth of epitaxial thin films. The YBa2Cu 3O7-δ phase was observed to grow near the Cu I/CuII boundary. The growth step was followed by a low temperature anneal in one atm of oxygen. Jc and Tc values were found to depend strongly on processing conditions. With optimum processing, a Tc of 90 K and a Jc of 20kA/cm2 at 65 K, were measured. XRD patterns of chemically etched surfaces of the processed tapes gave some evidence for epitaxial alignment of the YBa2Cu3O7-δ with the pre-textured silver matrix

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:11 ,  Issue: 1 )

Date of Publication:

Mar 2001

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