Evaluation of Aberration-corrected Optical Sectioning for Exploring the Core Structure of 1/2[111] Screw Dislocations in BCC Metals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00483111" target="_blank" >RIV/68081723:_____/17:00483111 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1017/S1431927617002847" target="_blank" >http://dx.doi.org/10.1017/S1431927617002847</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/S1431927617002847" target="_blank" >10.1017/S1431927617002847</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of Aberration-corrected Optical Sectioning for Exploring the Core Structure of 1/2[111] Screw Dislocations in BCC Metals

Popis výsledku v původním jazyce

The introduction of spherical-aberration correctors in the Scanning Transmission Electron Microscopen(STEM) has allowed an improvement in spatial resolution to the sub-angström scale accompanied by anreduction of the depth of focus (due to the increase in probe convergence angles), which in a modernninstrument is just a few nanometers, thus often less than the sample thickness. This can be exploited tonextract information along the beam direction by focusing the electron probe at specific depths within thensample. In this communication we will evaluate the optical sectioning technique to explore the core structure ofn1/2[111] screw dislocations in body-centred cubic (BCC) metals. The study of this structure is of highninterest because the low-temperature plastic deformation of BCC metals is controlled by the glide ofn1/2[111] screw dislocations. The aim of this work is to investigate whether the edge and screw displacementsnassociated with 1/2[111] screw dislocations in BCC metals can be detected by optical sectioning in high-anglenannular dark field (HAADF) imaging in STEM conditions.

Název v anglickém jazyce

Evaluation of Aberration-corrected Optical Sectioning for Exploring the Core Structure of 1/2[111] Screw Dislocations in BCC Metals

Popis výsledku anglicky

The introduction of spherical-aberration correctors in the Scanning Transmission Electron Microscopen(STEM) has allowed an improvement in spatial resolution to the sub-angström scale accompanied by anreduction of the depth of focus (due to the increase in probe convergence angles), which in a modernninstrument is just a few nanometers, thus often less than the sample thickness. This can be exploited tonextract information along the beam direction by focusing the electron probe at specific depths within thensample. In this communication we will evaluate the optical sectioning technique to explore the core structure ofn1/2[111] screw dislocations in body-centred cubic (BCC) metals. The study of this structure is of highninterest because the low-temperature plastic deformation of BCC metals is controlled by the glide ofn1/2[111] screw dislocations. The aim of this work is to investigate whether the edge and screw displacementsnassociated with 1/2[111] screw dislocations in BCC metals can be detected by optical sectioning in high-anglenannular dark field (HAADF) imaging in STEM conditions.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Microscopy and Microanalysis

ISSN

1431-9276

e-ISSN

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Svazek periodika

23

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

2

Strana od-do

432-433

Kód UT WoS článku

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EID výsledku v databázi Scopus

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