Sub-grain boundaries and dissociations of dislocations in yttrium iron garnet deformed at high temperatures
- 1 June 1979
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 39 (6) , 693-708
- https://doi.org/10.1080/01418617908239300
Abstract
Sub-grain boundaries in YIG single crystals deformed at high temperatures (0·8-0·9 TM) have been studied by transmission electron microscopy. Dislocation networks form mainly by climb; they are formed from dislocations with α/2 〈111〉 Burgers vectors. Dislocation junctions with α 〈100〉 Burgers vectors are usually found in networks; however, junctions with α 〈110〉 Burgers vectors are occasionally observed. They are dissociated into two partial dislocations with collinear Burgers vectors and the resulting fault configuration has been shown to be one corresponding to climb.Keywords
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