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Substitutional diffusion in multicomponent solids with non-ideal sources and sinks for vacancies

SYSNO ASEP	0352150
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Substitutional diffusion in multicomponent solids with non-ideal sources and sinks for vacancies
Author(s)	Fischer, F. D. (AT) Svoboda, Jiří (UFM-A)_{RID, ORCID}
Number of authors	2
Source Title	Acta Materialia. - : Elsevier - ISSN 1359-6454 Roč. 58, č. 7 (2010), s. 2698-2707
Number of pages	10 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	Substitutional diffusion ; Vacancies ; Annihilation
Subject RIV	BJ - Thermodynamics
R&D Projects	OC10029 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z20410507 - UFM-A (2005-2011)
UT WOS	000276523200042
DOI	10.1016/j.actamat.2010.01.003
Annotation	Based on previous work by the authors the diffusion equations for a multicomponent solid are derived. Generation and annihilation of vacancies are described by an evolution law which is directly coupled with an eigenstrain rate. Manning’s correlation factor f is used in the kinetic factor for diffusion of vacancies. In addition to presentation of the diffusion equations, a rigorous treatment of the boundary conditions, assuming no or an ideal source and sink for vacancies at the surface, is presented. As an instructive example development of the site fractions of the components and the eigenstress state are demonstrated for a multicomponent chemically inhomogeneous layer on a substrate. Both the role of nonlinear terms and the correlation factor f in the diffusion equations are studied. Computational procedures to calculate to the proper boundary conditions are also outlined.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2011

Number of the records: 1