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The demonstration of Y2BaCuO5 particle segregation in melt-processed YBa2Cu3O7−x through a computer visualization model

Published online by Cambridge University Press:  31 January 2011

C. Varanasi,
M. A. Black and
P. J. McGinn
C. Varanasi
Affiliation:
Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556–4537
M. A. Black
Affiliation:
Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556–4537
P. J. McGinn
Affiliation:
Department of Chemical Engineering, University of Notre Dame, Notre Dame, Indiana 46556–4537
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Abstract

In melt-processed YBa2Cu3O7−x (123) microstructures, often unreacted Y2BaCuO5 (211) particles are observed to be present in an inhomogeneous manner delineating distinguishable patterns. The presence of these patterns in 123 is more clearly observed in the case of low 211 volume concentration and also when the 211 particle size is small. The observed patterns are believed to be due to 211 particle segregation in 123 domains in specific planes during melt texture growth. In the present paper a software program is used to draw a three-dimensional visualization model to demonstrate a possible structure of 211 particle segregation in 123 domains and to explain the presence of observed patterns in the microstructures. The formation of such a 211 particle segregation is explained in the light of previously proposed 123 growth mechanisms.

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Journal of Materials Research , Volume 11 , Issue 3 , March 1996, pp. 565 - 571
Copyright
Copyright © Materials Research Society 1996

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