Disclinations and disconnections in minerals and metals

Disclinations and disconnections in minerals and metals

A different type of defect, the coherency disclination, is added to disclination types. Disconnections that include disclination content are considered. A criterion is suggested to distinguish disconnections with dislocation content from those with disclination content. Electron microscopy reveals u...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 2020-01, Vol.117 (1), p.196-204
Hauptverfasser: Hirth, John P., Hirth, Greg, Wang, Jian
Format: Artikel
Sprache:eng
Schlagworte:
Crystal defects
Disclinations
Electron microscopy
Grain boundaries
Grain boundary sliding
Metals
Minerals
Physical Sciences
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Zusammenfassung:A different type of defect, the coherency disclination, is added to disclination types. Disconnections that include disclination content are considered. A criterion is suggested to distinguish disconnections with dislocation content from those with disclination content. Electron microscopy reveals unit disconnections in a low albite grain boundary, defects important in grain boundary sliding. Disconnections of varying step heights are displayed and shown to define both deformed and recovered structures.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1915140117