Weak-beam study of superlattice dislocations in nial
- 1 January 1992
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 65 (1) , 1-13
- https://doi.org/10.1080/01418619208201475
Abstract
Superlattice dislocations with Burgers vectors, introduced in NiAl single crystals by compression at room temperature, along the [001] crystal axis, are studied by weak-beam transmission electron microscopy. It is found that slip in the direction occurs in a {112} plane. Dissociation, if any, does not exceed 1.5 nm, thus establishing a lower limit for the antiphase boundary energy on {011} and {112} planes at approximately 500 and 750 mJm−2, respectively. Double images may arise under weak-beam conditions, due to double diffraction at the core of superlattice dislocations.Keywords
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