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Diffusion Processes in a Migrating Interface – The Thick Interface Model
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SYSNO ASEP 0363680 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Diffusion Processes in a Migrating Interface – The Thick Interface Model Author(s) Svoboda, Jiří (UFM-A) RID, ORCID
Gamsjäger, E. (AT)
Fischer, F. D. (AT)
Liu, Y. (AT)
Kozeschnik, E. (AT)Number of authors 5 Source Title Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 59, č. 12 (2011), s. 4775-4786Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords Modeling ; Diffusion ; Phase transformation ; Interface migration 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 000292426500004 DOI 10.1016/j.actamat.2011.04.020 Annotation During a solid/solid diffusive phase transformation from a parent b-phase to a product a-phase, dissipative processes due to diffusion in the bulk phases as well as rearrangement of the crystal lattice and diffusion in the interfacial region occur. A model has been developed that accounts for all the above-mentioned dissipative processes. By means of this thick-interface model it is possible to assign a finite thickness and a finite mobility to the interface. The evolution of the mole fraction profiles of the components in the bulk phases and in the interface can be simulated from a given initial state until a steady state or equilibrium is attained. Based on this theoretical framework the kinetics of the c/a phase transformation in the Fe-rich Fe–Cr–Ni system is simulated. Starting from a certain initial composition the transformation kinetics exhibits the features of a massive or a bulk diffusion controlled transformation depending on temperature. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
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