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Oriented Microstructure of Ybco Thick Films

Published online by Cambridge University Press:  28 February 2011

F. Wellhofer,
T.C. Shields,
J.S. Abell and
K.N.R. Taylor
F. Wellhofer
Affiliation:
Permanent address: Lucas Advanced Engineering Centre, Shirley, Solihull B90 4JJ, UK
T.C. Shields
Affiliation:
Superconductivity Research Group School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, UK
J.S. Abell
Affiliation:
Superconductivity Research Group School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, UK
K.N.R. Taylor
Affiliation:
Superconductivity Research Group School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, UK
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Abstract

The surface morphology and internal structure of a superconducting screen printed thick film of YBCO has been examined by means of optical and scanning electron microscopy. The highly textured track was sintered at a temperature above the peritectic temperature of the 123 phase, and the resulting characteristic spherulitic morphology has been found to be associated with underlying elongated strands of CuO. The composition of the inter‐diffusion layer formed at the film/substrate boundary is consistent with a Ba(Zr,Cu)O3 solid solution with small concentrations of yttrium.

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