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The nature of [001] tilt grain boundaries in YBa2Cu3O7−x

Published online by Cambridge University Press:  31 January 2011

Frank W. Gayle  and
Debra L. Kaiser
Frank W. Gayle
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Science and Technology, Gaithersburg, Maryland 20899
Debra L. Kaiser
Affiliation:
Materials Science and Engineering Laboratory, National Institute of Science and Technology, Gaithersburg, Maryland 20899
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Abstract

Fifty-two faceted grain boundary segments ([001] tilt boundaries) in clusters of bulk-scale YBa2Cu3O7−x crystals having coincident c-axes were characterized by optical microscopy techniques. Grain boundary orientations were widely distributed. All grain boundaries, except those far from the symmetric condition and those with {110} facets, exhibited well-developed matching of the twin domains across the boundary. It is suggested that this newly reported phenomenon of twin pattern matching occurs due to a local coordination of the tetragonal → orthorhombic transformation strain across grain boundaries and may be beneficial with regard to electrical transport in highly textured polycrystalline material.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 5 , May 1991 , pp. 908 - 915
Copyright
Copyright © Materials Research Society 1991

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