Silver encased high temperature superconductor ribbons produced by rolling

Author

Whitlow, G.A. ; Iyer, N.C. ; Male, A.T. ; Powell, J.C. ; Wagner, G.R.

Author_Institution

Westinghouse Res. & Dev. Center, Pittsburgh, PA, USA

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

2317

Lastpage

2319

Abstract

Ribbons of silver/yttrium-barium-copper oxide/silver (Ag/YBCO/Ag), nominally 0.01 in. (0.25 mm) thick, have been fabricated by unidirectional rolling and their resulting microstructures and superconducting properties evaluated. The influence of a postfabrication sinter/oxygen replenishment anneal on their properties has been determined. Grain alignment/preferred orientation of the YBCO core was observed. Typical transport critical-current densities measured in zero field at 4.2 and 77 K were 600 and 125 A/cm², respectively. Preliminary experiments on the bismuth-containing high-temperature superconductors have indicated that codeformation of a silver composite billet by rolling to thin strip is easily accomplished

Keywords

annealing; barium compounds; ceramics; cold rolling; critical current density (superconductivity); crystal microstructure; high-temperature superconductors; silver; yttrium compounds; 4.2 K; 77 K; Ag encapsulation; YBa₂Cu₃O₇-Ag; grain alignment; high temperature superconductor ribbons; high temperature superconductors; microstructures; postfabrication sinter/oxygen replenishment anneal; rolling; superconducting properties; transport critical-current densities; unidirectional rolling; Annealing; Bismuth; Conducting materials; Conductors; Current density; Fabrication; High temperature superconductors; Silver; Solenoids; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92772

Filename

92772