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Effects of the time sequence of the cold-rolling on the processing time of Ag-sheathed (Bi, Pb)2Sr2Ca2Cu3Ox tapes

Penny, M., Beduz, C., Yang, Y., Al Mosawi, M., Scurlock, R.G. and Wroe, R. (1996) Effects of the time sequence of the cold-rolling on the processing time of Ag-sheathed (Bi, Pb)2Sr2Ca2Cu3Ox tapes Physica C: Superconductivity And its Applications, 262, (1-2), pp. 63-67. (doi:10.1016/0921-4534(96)00198-0).

Record type: Article

Abstract

The effect of the time sequence of cold working/sintering on the transport Jc has been studied. The results on the variation of Jc with sintering time between the first and second intermediate cold rolling, ts2, are presented. We have found that Jc peaks sharply at an optimum ts2. For example, tapes with a total sintering time of 140 h reach an optimum Jc of 2.1 × 104 A cm?2 (77 K, self-field) at ts2 = 27 h. In general, there is a narrow window of optimisation in ts2ts2; in this examples, Jc drops by 50% within 7 h of the optimised value. We also found that the optimum total singering time (ttot) for a tape increases gradually with ts2e.g. ttot < 90 h for ts2 = 22 h and ttot > 180 h for ts2 = 35 h. X-ray diffraction analysis (XRD) was used to correlate the phase conversion prior to the second intermediate rolling with the Jc. The results suggest that the total processing time can be adjusted by ts2. This has important consequences on reducing the long processing time of BSCCO tapes.

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Published date: 1996

Identifiers

Local EPrints ID: 21095
URI: http://eprints.soton.ac.uk/id/eprint/21095
ISSN: 0921-4534
PURE UUID: 7f6395dd-9356-482d-835f-0243060812e0
ORCID for Y. Yang: ORCID iD orcid.org/0000-0002-3874-6735

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Date deposited: 31 Oct 2006
Last modified: 17 Jul 2017 16:27

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Contributors

Author: M. Penny
Author: C. Beduz
Author: Y. Yang ORCID iD
Author: M. Al Mosawi
Author: R.G. Scurlock
Author: R. Wroe

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