Počet záznamů: 1
Stress Development During Reaction of Metallic Nanospheres with Gas
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SYSNO ASEP 0363673 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Stress Development During Reaction of Metallic Nanospheres with Gas Tvůrce(i) Svoboda, Jiří (UFM-A) RID, ORCID
Fischer, F. D. (AT)Celkový počet autorů 2 Zdroj.dok. Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 59, č. 1 (2011), s. 61-67Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Bulk diffusion ; Phase transformation kinetics ; Oxidation Vědní obor RIV BJ - Termodynamika CEP GAP108/10/1781 GA ČR - Grantová agentura ČR CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000284789200007 DOI 10.1016/j.actamat.2010.09.001 Anotace The formation of stoichiometric MpXq hollow nanospheres by reaction of metallic M nanospheres with the gaseous X phase must be preceded by the formation of a sufficiently thickMpXq nanoshell on the metallic core of phase M. During this stage, high supersaturation of vacancies in the M core and/or hydrostatic stress in the M core, due to the misfit between the core and the nanoshell, are developed and provide favourable conditions for the hollow nucleation. The misfit is caused by the Kirkendall effect. Based on the application of the thermodynamic extremal principle, a kinetic model of MpXq nanoshell formation is derived. The kinetics is driven by the change of the chemical energy due to reaction of the M and X components, the interface and surface energies, and the elastic strain energy due to misfit strain of the whole system. The model is used for simulation of the Cu2O shell growth kinetics due to oxidation of a Cu nanosphere, and the results of the simulations are discussed. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2012
Počet záznamů: 1