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Modeling of dendritic crystal growth in undercooled Ni-Zr melts

Galenko, P. K. and Reutzel, S. and Herlach, D. M. and Danilov, D. and Nestler, B. (2006) Modeling of dendritic crystal growth in undercooled Ni-Zr melts. Frühjahrstagung des Arbeitskreises Festkörperphysik der DPG zusammen mit der Condensed Matter Division der EPS, 2006-03-26 - 2006-03-31, Dresden.

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Abstract

Growth of dendritic crystals in undercooled Ni-Zr samples is studied by experimental, analytical and numerical methods. Experimental results provided by electo-magnetic levitation technique are compared with predictions of a sharp-interface model and of a diffuse-interface model. Using the sharp-interface model, kinetics of dendritic growth has been evaluated in the whole range of measured undercooling and of growth velocity of Ni-Zr dendrites. For the undercoolings up to 100 K the results of 2D isothermal and non-isothermal phase-field simulations are compared with the corresponding sharp-interface predictions. A form of modeled dendrites is compared with parabolic dendritic tip analytically found in the sharp-interface model. <p>This work was performed with support from DFG under the projects Nos. He 1601/13 and Ne 822/2</p>

Document Type:Conference or Workshop Item (Poster)
Title:Modeling of dendritic crystal growth in undercooled Ni-Zr melts
Authors:
AuthorsInstitution or Email of Authors
Galenko, P. K.UNSPECIFIED
Reutzel, S.Ruhr-Universität Bochum
Herlach, D. M.UNSPECIFIED
Danilov, D.Hochschule Karlsruhe Technik und Wirtschaft
Nestler, B.Hochschule Karlsruhe Technik und Wirtschaft
Date:2006
Status:Published
Keywords:Unterkühlung von Materialien
Event Title:Frühjahrstagung des Arbeitskreises Festkörperphysik der DPG zusammen mit der Condensed Matter Division der EPS
Event Location:Dresden
Event Type:international Conference
Event Dates:2006-03-26 - 2006-03-31
Organizer:DPG und EPS
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 > Institute of Space Simulation > Center for Solidification of Undercooled Melts (ZEUS)
Deposited By: Dr.rer.nat. Sven Reutzel
Deposited On:01 Mar 2007
Last Modified:27 Apr 2009 12:49

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