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Non-equilibrium solidification of intermetallic compounds in the Ni-Al alloy system
Hartmann, H. and Reutzel, S. and Galenko, P. K. and Assadi, H. and Herlach, D. M. (2007) Non-equilibrium solidification of intermetallic compounds in the Ni-Al alloy system. TMS Annual Meeting 2007, 2007-02-25 - 2007-03-01, Orlando, FL (USA).
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Abstract
Ni-Al alloy system exhibits particular solidication behavior due to chemical long-range order of the intermetallic compounds Ni<sub>3</sub>Al (L1<sub>2</sub>) and NiAl (B2). Using rapid solidication technique their slow solidication kinetics leads to the entrapment of solute atoms and/or disorder, respectively. In the present work containerless processing by applying electromagnetic levitation technique is used to analyze the aspects of dendrite growth, as observed in solidication of undercooled Ni-Al melts. Sharp-interface modeling is used to illustrate the effect of chemical order on the solidication kinetics of intermetallic phases. Both experimental results and theoretical work denote the role of chemical order in solidication of Ni-Al intermetallics.
| Document Type: | Conference or Workshop Item (Poster) | ||||||||||||
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| Title: | Non-equilibrium solidification of intermetallic compounds in the Ni-Al alloy system | ||||||||||||
| Authors: |
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| Date: | 2007 | ||||||||||||
| Status: | Published | ||||||||||||
| Keywords: | Unterkühlung von Materialien | ||||||||||||
| Event Title: | TMS Annual Meeting 2007 | ||||||||||||
| Event Location: | Orlando, FL (USA) | ||||||||||||
| Event Type: | international Conference | ||||||||||||
| Event Dates: | 2007-02-25 - 2007-03-01 | ||||||||||||
| Organizer: | The Minerals, Metals and Materials Society | ||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
| HGF - Program: | Space | ||||||||||||
| HGF - Program Themes: | W FR - Forschung unter Weltraumbedingungen | ||||||||||||
| DLR - Research area: | Space | ||||||||||||
| DLR - Program: | W FR - Forschung unter Weltraumbedingungen | ||||||||||||
| DLR - Research theme (Project): | W - Vorhaben Materialforschung unter Mikro-g (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: | 13 Aug 2007 | ||||||||||||
| Last Modified: | 14 Jan 2010 23:17 |
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