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Müller, Anja and Ratke, Lorenz (2005) On a Morphological Transition in Monotectic Solidification. In: Solidification and Gravity IV, 508, pp. 93-98. Trans Tech Publications. Forth International Conference on Solidification and Gravity, 2004-09-06 - 2004-09-09, Miskolc, Hungary. ISBN 0-87849-991-1.
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Abstract
Al-Bi and Al-In of exact monotectic composition were directionally solidified with solidification velocities ranging from 0.3 μm/sec to 5 μm/sec and temperature gradients from 2 K/mm to 6.5 K/mm. Three distinct microstuctures could be observed: fibers, strings of pearls or irregular arrays of second phase droplets. The transitions from fibers to strings of pearls is discussed theoretically and compared with the experimental results. The origin of this transition seems to be a Nichols and Mullins instability of the fibers during cooling from the monotectic to the eutectic temperature caused by surface perturbations driving volume diffusion of solute in the liquid fibers of the second phase.
| Item URL in elib: | https://elib.dlr.de/20780/ | ||||||||||||||||
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| Document Type: | Conference or Workshop Item (Paper, Poster) | ||||||||||||||||
| Title: | On a Morphological Transition in Monotectic Solidification | ||||||||||||||||
| Authors: |
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| Date: | 2005 | ||||||||||||||||
| Journal or Publication Title: | Solidification and Gravity IV | ||||||||||||||||
| Refereed publication: | No | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | No | ||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||
| Volume: | 508 | ||||||||||||||||
| Page Range: | pp. 93-98 | ||||||||||||||||
| Editors: |
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| Publisher: | Trans Tech Publications | ||||||||||||||||
| Series Name: | Materials Science Forum | ||||||||||||||||
| ISBN: | 0-87849-991-1 | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | Directional solidification, immiscible alloys, systems Al-Bi and Al-In, morphology transitions in monotectic alloys | ||||||||||||||||
| Event Title: | Forth International Conference on Solidification and Gravity | ||||||||||||||||
| Event Location: | Miskolc, Hungary | ||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||
| Event Start Date: | 6 September 2004 | ||||||||||||||||
| Event End Date: | 9 September 2004 | ||||||||||||||||
| 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 | ||||||||||||||||
| Deposited By: | Ratke, Prof. Lorenz | ||||||||||||||||
| Deposited On: | 21 Dec 2005 | ||||||||||||||||
| Last Modified: | 24 Apr 2024 19:02 |
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