Observation of misfit dislocation arrays in high angle (110) twist grain boundaries in gold
- 1 November 1970
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 22 (179), 1063-1068
- https://doi.org/10.1080/14786437008221075
Abstract
The fine structure of high angle (110) twist boundaries in gold was studied using electron microscopy. A considerable number of boundaries was prepared by welding epitaxial thin films of gold together at various twist angles. Orthogonal arrays of grain boundary misfit dislocations were detected in the vicinity of the critical angles at which the two highest density coincidence site interfaces are formed in this system. These orthogonal arrays were shown to consist of grids of screw dislocations embedded in the interfaces corresponding to the exact high density coincidence misorientations. The misfit dislocations therefore served to ‘correct’ for effects due to rotational deviations from the exact coincidence site orientations.Keywords
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