Počet záznamů: 1
Modelling for hydrogen diffusion in metals with traps revisited
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SYSNO ASEP 0369684 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Modelling for hydrogen diffusion in metals with traps revisited 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. 60, č. 3 (2012), s. 1211-1220Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Hydrogen ; Effective diffusivity ; Trapping Vědní obor RIV BJ - Termodynamika CEP GAP204/10/1784 GA ČR - Grantová agentura ČR CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000301157900042 DOI 10.1016/j.actamat.2011.11.025 Anotace A rigorous concept for diffusion of hydrogen is presented that allows for the role of trapping and/or hydrostatic stress. Nonlinear partial differential equations for the concentration of freely diffusing hydrogen in the lattice and for the total concentration of hydrogen both in the lattice and traps are derived. A generalized chemical diffusion coefficient can be deduced and is compared with reported relations from the literature. Simulation results are presented for different amounts of traps and their different energetic levels (depths), both for hydrogen concentration profiles and the total amount of hydrogen in the case of charging or discharging a cylindrical specimen. A significant charging/discharging asymmetry occurs for high hydrogen concentrations and high amounts of traps of sufficient depth. Comparisons of the chemical diffusion coefficient with experimental results from the literature are also presented. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2012
Počet záznamů: 1