Počet záznamů: 1
Modelling of Excess Vacancy Annihilation at Different Types of Sinks
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SYSNO ASEP 0363694 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Modelling of Excess Vacancy Annihilation at Different Types of Sinks Tvůrce(i) Fischer, F. D. (AT)
Svoboda, Jiří (UFM-A) RID, ORCID
Appel, F. (DE)
Kozeschnik, E. (AT)Celkový počet autorů 4 Zdroj.dok. Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 59, č. 9 (2011), s. 3463-3472Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Vacancies ; Annihilation ; Substitutional diffusion Vědní obor RIV BJ - Termodynamika CEP GAP108/10/1781 GA ČR - Grantová agentura ČR CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000290692600015 DOI 10.1016/j.actamat.2011.02.020 Anotace The equilibrium site fraction of vacancies increases with temperature and, thus, annealing and rapid quenching may lead to states with a significant vacancy supersaturation. Excess vacancies can then gradually annihilate at available sinks represented by jogs at dislocations, by grain boundaries or free surfaces. Significant supersaturation by vacancies may also lead to the nucleation and growth of Frank loops acting as additional sinks. Three models corresponding to three different annihilation mechanisms are developed in this paper. They refer to annihilation of excess vacancies at jogs at dislocation with a constant density, at homogeneously distributed Frank loops with a constant density and at grain boundaries. The simulations based on the models are performed for individual annihilation mechanisms under isothermal and non-isothermal conditions as well as for simultaneous annihilation of vacancies at Frank loops and dislocation jogs and grain boundaries using different cooling conditions. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2012
Počet záznamů: 1