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Modeling of diffusional phase transformation in multi-component systems with stoichiometric phases
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SYSNO ASEP 0352152 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Modeling of diffusional phase transformation in multi-component systems with stoichiometric phases Author(s) Svoboda, Jiří (UFM-A) RID, ORCID
Fischer, F. D. (AT)
Abart, R. (DE)Number of authors 3 Source Title Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 58, č. 8 (2010), s. 2905-2911Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords Interdiffusion ; Intermetallics ; Phase transformation kinetics 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 000276736200011 DOI 10.1016/j.actamat.2010.01.019 Annotation In many multi-component systems, phases can be considered stoichiometric. If two phases not stably coexisting are brought into contact, multiple new phases may nucleate at the interface and develop into a sequence of layers with different phase compositions, which grow between the original phases. Inert markers at the original contact may show “splitting” of the marker (Kirkendall) plane, called polyfurcation. Nearly exclusively binary systems have been studied theoretically or experimentally. A thermodynamic model for the kinetics of diffusional phase transformation in multi-component systems and motion of the polyfurcated Kirkendall plane is derived by the thermodynamic extremal principle. The degrees of freedom of the system are discussed rigorously. The model is demonstrated on simulations of kinetics in binary three-phase and ternary four-phase systems. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2011
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