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Non-locality and fluctuations in fast spinodal decomposition controlled by diffusion

Galenko, Peter (2010) Non-locality and fluctuations in fast spinodal decomposition controlled by diffusion. The 8th AIMS Conference on Dynamical Systems, Differential Equations and Applications, 25. - 28. Mai 2010, Technical University Dresden.

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Abstract

Spinodal decomposition in a binary system deeply supercooled or superheated into the unstable region of miscibility gap in a phase diagram is analysed. A large driving force for phase separation in the spinodal region leads to the phenomenon of the fast spinodal decomposition, thermodynamic aspects of which are presented for locally nonequilibrium binary system with fluctuations. The role of deterministic and stochastic contributions is clarified for spinodally decomposing phases. Early time kinetics of phase separation is modelled and evaluated by the structure factor. Outcomes of the present model predictions are compared with the results obtained using the CHC(Cahn-Hilliard-Cook)-model and LBM(Langer-Baron-Miller)-model. The practically important cases of the fast spinodal decomposition in alloys are predicted and analyzed in comparison with accessible experimental data.

Document Type:Conference or Workshop Item (Speech)
Additional Information:Eingeladener Vortrag Symposium: Phase Field Methods in Material Sciences The 8th AIMS Conference on Dynamical Systems, Differential Equations and Applications 2010 TU Dresden
Title:Non-locality and fluctuations in fast spinodal decomposition controlled by diffusion
Authors:
AuthorsInstitution or Email of Authors
Galenko, Peterpeter.galenko@dlr.de
Date:25 May 2010
Status:Published
Keywords:spinoidal decomposition
Event Title:The 8th AIMS Conference on Dynamical Systems, Differential Equations and Applications
Event Location:Technical University Dresden
Event Type:international Conference
Event Dates:25. - 28. Mai 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Dieter Herlach
Deposited On:18 Jun 2010 08:22
Last Modified:18 Jun 2010 08:22

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