Study of energy vs misorientation for grain boundaries in gold by crystallite rotation method—I. [001] Twist boundaries
✍ Scribed by Siu-Wai Chan; R.W. Balluffi
- Publisher
- Elsevier Science
- Year
- 1985
- Weight
- 830 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0001-6160
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✦ Synopsis
Small gold crystallites (-50-80 nm dia) were welded to thin film [OOI] single crystal gold substrates at a series of predetermined [OOl] twist angles in the range O-45". A pure [OOI] twist boundary therefore existed in each welded neck region which could be observed directly by transmission electron microscopy at normal incidence. Upon annealing, the crystallites rotated around [OOI] when the boundary energy varied with 0. .The crystallites rotated into three misorientations corresponding to the special X.1 and Z5 misorientations and a symmetry related misorientation at 0 = 45". These results indicate the existence of grain boundary dislocation (GBD) related cusps on the boundary energy vs 0 curve at ZI and 25. The rotations occurred conservatively by the motion of screw GBDs which could be observed directly by the transmission microscopy in certain regimes of 0. The results are relevant to recent calculations of the energies of [OOI] twist boundaries and the applicability of the GBD/structural unit model for grain boundaries.