Morphological aspects of the shear transformation in YBa2Cu3O7-δ: To twin or not to twin?
- 1 June 1990
- journal article
- research article
- Published by Taylor & Francis in Phase Transitions
- Vol. 22 (1-4) , 51-62
- https://doi.org/10.1080/01411599008207214
Abstract
The fine structure of YBaCu3O7 is examined: Twin organization, planar defects, and structural phase co-existence are discussed in the context of the tetragonal to orthorhombic transformation. Heterogeneous nucleation of an insulating phase at the twin boundary and sub-grain boundaries is demonstrated. On the basis of the morphological observations, the transformation is classified as martensitic. Considering the role of twin in relieving the martensitic transformation strain, by producing a low strain energy habit plane, the feasibility of the formation of a twinless structure is discussed.Keywords
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