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Controlled processing and properties of large Pt-doped Y–Ba–Cu–O pseudocrystals for electromagnetic applications

Published online by Cambridge University Press:  31 January 2011

Wai Lo ,
D. A. Cardwell ,
C. D. Dewhurst ,
H-T. Leung ,
J. C. L. Chow  and
Y. H. Shi
Wai Lo
Affiliation:
IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
D. A. Cardwell
Affiliation:
IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
C. D. Dewhurst
Affiliation:
IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
H-T. Leung
Affiliation:
IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
J. C. L. Chow
Affiliation:
IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
Y. H. Shi
Affiliation:
IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom
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Abstract

The quality and preparation of Sm–Ba–Cu–O (SmBCO) seeds, the level of Pt-doping, and the temperature distribution in the thermal processing system have been investigated in detail and identified as key processing factors in the fabrication of large melt processed Pt dope Y–Ba–Cu–O pseudocrystals. Optimization of these process variables and features has been performed to enable controlled processing of these materials up to several centimeters in diameter. Inhomogeneities and second phases present in the YBCO-Pt pseudocrystal microstructure have been analyzed and correlated with a variation of superconducting properties within the bulk of the sample. These observations have clear implications for the controlled processing of large YBCO-Pt pseudocrystals for electromagnetic applications.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 11 , November 1997 , pp. 2889 - 2900
Copyright
Copyright © Materials Research Society 1997

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