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On a Morphological Transition in Monotectic Solidification

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, 2004-9-6 - 2004-9-9, Miskolc, Hungary. ISBN 0-87849-991-1

Full text not available from this repository.

Official URL: http://www.scientific.net

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/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:On a Morphological Transition in Monotectic Solidification
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Müller, AnjaUNSPECIFIEDUNSPECIFIED
Ratke, LorenzUNSPECIFIEDUNSPECIFIED
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:
EditorsEmail
Roosz, A.UNSPECIFIED
Rettenmayr, M.UNSPECIFIED
Gacsi, Z.UNSPECIFIED
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 Dates:2004-9-6 - 2004-9-9
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:27 Apr 2009 04:48

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