Etude optique, par microscopie electronique, des dislocations dans l'oxysulfure de lanthane I. Dislocations dans le plan de base

Autor:	J. Loriers, P.E. Caro, D. Colaïtis
Rok vydání:	1975
Předmět:	Plane (geometry) Chemistry Mechanical Engineering Condensed Matter Physics law.invention Crystallography Mechanics of Materials law Stacking-fault energy Ribbon General Materials Science Basal plane Electron microscope Specific model Burgers vector Stacking fault
Zdroj:	Materials Research Bulletin. 10:717-723
ISSN:	0025-5408
DOI:	10.1016/0025-5408(75)90056-2
Popis:	Platelets of lanthanum oxysulphide were deformed inside the electron microscope and observed in transmission. Dislocations very mobile along the basal plane and having a Burgers vector in this plane, have been observed. The dislocations are dissociated into ribbons consisting of two partials separated by a stacking fault. Interactions between sets of ribbon dislocations with Burgers vector at 120° resulted in the formation of networks which, because of the low stacking fault energy in this material, consisted of a triangular mosaic pattern. A specific model for these dislocations is presented. It results from translation between adjacent sulfur and [LaO] n+ n sheets.
Databáze:	OpenAIRE
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