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Phase Development in Ag-Clad Bscco Wires

Published online by Cambridge University Press:  28 February 2011

R.D. Ray II  and
E.E. Hellstrom
R.D. Ray II
Affiliation:
Materials Science and Engineering, University of Wisconsin‐Madison, Madison, WI 53706, U.S.A.
E.E. Hellstrom
Affiliation:
Materials Science and Engineering, University of Wisconsin‐Madison, Madison, WI 53706, U.S.A.
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Abstract

We have studied phase evolution in Ag‐clad BSCCO wires with nominal composition Bi2.4.8Sr2.05Ca0.95Cu2.27Oy‐ The wires were initially processed at 920°C where the oxide was partiaily moiten, then subsequently annealed at 840° C. The microstructure and composition of the phases present were studied at different points in the processing using optical and scanning electron microscopy, and electron probe microanalysis. The microstructure became simpler during the anneal resulting in two oxide phases and Ag. Ag from the cladding had dissolved into the melt at 920° C and subsequently precipitated in the core of the wire on cooling to the annealing temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 1291
Copyright
Copyright © Materials Research Society 1990

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References

1 Heine, K., Tenbrink, J., and Thoner, M., submitted to Appl. Phys. Lett., and private communication.Google Scholar
2 Osamura, K., private communication, U.W.‐Madison 1989.Google Scholar
3 Ray II, R.D. and Hellstrom, E.E., submitted to Appl. Phys. Lett.Google Scholar
4 Roth, R.S., Rawn, C.J., Ritter, J.J., and Burton, B.P., J. Am. Cer. Soc. 22,1545 (1989).Google Scholar