Počet záznamů: 1
Dislocation dissociations in C11.sub.b./sub. MoSi.sub.2./sub. and their impact on its plastic deformation
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SYSNO ASEP 0490262 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Dislocation dissociations in C11.sub/sub. MoSi2 and their impact on its plastic deformation Tvůrce(i) Paidar, Václav (FZU-D) RID, ORCID
Čák, M. (DE)
Šob, Mojmír (UFM-A) RID, ORCID
Vitek, V. (US)Celkový počet autorů 4 Zdroj.dok. Intermetallics. - : Elsevier - ISSN 0966-9795
Roč. 97, Jun (2018), s. 34-41Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova hexagonal metals ; mechanical properties ; twinning Vědní obor RIV BM - Fyzika pevných látek a magnetismus Obor OECD Condensed matter physics (including formerly solid state physics, supercond.) CEP GA16-14599S GA ČR - Grantová agentura ČR GA16-24711S GA ČR - Grantová agentura ČR LQ1601 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora FZU-D - RVO:68378271 ; UFM-A - RVO:68081723 UT WOS 000433016500006 EID SCOPUS 85044859710 DOI 10.1016/j.intermet.2018.03.003 Anotace Using the DFT calculated gamma-surfaces possible metastable stacking faults have been found for the most common slip planes {013) and {110) in MoSi2. These calculations reveal three distinct stacking faults on {013) planes and one stacking fault on {110) plane. Owing to such multiplicity of metastable stacking faults there is a large number of possible dislocation dissociations. These dislocation splittings are analysed using the anisotropic elasticity and relevant stacking faults. The results show that the only dissociations of the < 331] dislocations favoured over the complete undissociated dislocations are on {013) planes either in one or two planes of this type. Splitting into {110) planes are never favoured. For the screw dislocation the dissociations on {013) planes lead to configurations that are sessile and block the dislocations glide in the case of compression along the [001] axis. This explains why for this orientation of compressive axis the single crystals are brittle at ambient temperature but dislocation glide may occur for compressive loading along different, less symmetrical directions. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2019
Počet záznamů: 1