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STEM Optical Sectioning for Imaging Screw Dislocations Core Structures\nin BCC Metals
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SYSNO ASEP 0481153 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title STEM Optical Sectioning for Imaging Screw Dislocations Core Structures
in BCC MetalsAuthor(s) Hernandez-Maldonado, D. (GB)
Yang, H. (US)
Jones, L. (GB)
Gröger, Roman (UFM-A) RID, ORCID
Hirsch, P. B. (GB)
Ramasse, Q. M. (GB)
Nellist, P. D. (GB)Number of authors 7 Source Title Microscopy and Microanalysis. - : Cambridge University Press - ISSN 1431-9276
Roč. 22, S3 (2016), s. 1932-1933Number of pages 2 s. Language eng - English Country US - United States Keywords screw dislocation ; transmission electron microscopy ; imaging Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA16-13797S GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 DOI 10.1017/S1431927616010503 Annotation It is well known that the low-temperature plastic deformation of Body-Centred Cubic (BCC)
metals is controlled by the glide of 1/2[111] screw dislocations. Their low mobility is caused
by the delocalized nature of their cores which are extended into several planes in the zone
of the Burgers vector. This non-planar core spreading has been demonstrated by a number of
atomistic studies made in the last 46 years. However, attempts at experimental
observation have been hindered by the Eshelby twist effect. The aim of this work is to
investigate whether the edge and screw displacements associated with 1/2[111] screw
dislocations in BCC metals can be detected by optical sectioning in high-angle annular dark field
(HAADF) Scanning Transmission Electron Microscope (STEM) imaging conditions.Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2019
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