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Crystallographical Analysis of Intermediate Phases in BI(2223)/AG Tape

Published online by Cambridge University Press:  02 July 2020

Lijun Wu ,
Yimei Zhu  and
M. Suenaga
Lijun Wu
Affiliation:
Dept. of Applied Science, Brookhaven National Laboratory, Upton, NY11973
Yimei Zhu
Affiliation:
Dept. of Applied Science, Brookhaven National Laboratory, Upton, NY11973
M. Suenaga
Affiliation:
Dept. of Applied Science, Brookhaven National Laboratory, Upton, NY11973
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Extract

(Bi,Pb)2Sr2Ca2Cu3Ox/Ag composite tapes are currently the most promising high-temperature superconductors for large-scale applications. A major issue in further improving the supercurrent-carrying-capability and optimizing fabrication procedures of these tapes is to understand the formation kinetics of the Bi(2223) from precursor powders of Bi(2212), CaO, and CuO. Since the microstructural transformation during the complicated phase evolution is not well known yet, identification of minor phases at different transformation stage is desirable. Here, we report our crystallographic analysis of several frequently observed intermediate phases during the phase evolution.

The heat treatment of the tapes consisted of ramping the temperature to 840°C in air and of holding it for a prescribed period and then oil-quenching from various temperatures.

Type
Microscopy of Semiconducting and Superconducting Materials
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 674 - 675
Copyright
Copyright © Microscopy Society of America

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References

The research was supported by the U.S. Department of Energy, Division of Materials, Office of Basic Energy Science, under Contract No. DE-AC02-76CH0016.Google Scholar