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Solidification and melting of high temperature materials: in situ observations by synchrotron radiation

Shuleshova, Olga and Löser, Wolfgang and Holland-Moritz, Dirk and Herlach, Dieter and Eckert, Jürgen (2012) Solidification and melting of high temperature materials: in situ observations by synchrotron radiation. Journal of Materials Science, 47, pp. 4497-4513. DOI: 10.1007./s10853-011-6184-2.

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Abstract

Until recently understanding the solidification behavior of high temperature materials, including many intermetallic systems, required evaluation of a great number of individual solidification experimental results. An additional challenge was the reactivity of metallic melts at elevated temperatures. Alternative methods for in situ observation of solidification processes using the highenergy synchrotron X-ray diffraction, which came up in the last decade, are reviewed in the present work. Here, solidifying phases and transformation sequences are directly related to their X-ray diffraction pattern, which avoids any confusion caused by subsequent phase transformations especially in complex systems. By containerless processing with aerodynamic, electrostatic and electromagnetic levitation methods, adapted to the application at the synchrotron beamline, contamination of the melt with impurities is avoided, which can corrupt the results of solidification studies by conventional methods. To date, the majority of the studies is focused on metastable phase formation and the structure of undercooled melts. Current efforts on liquid–solid phase transformations under conditions close to the equilibrium, which provide a great potential for acquisition of phase diagram data of refractory and reactive alloys, are also addressed.

Document Type:Article
Additional Information:Invited Review
Title:Solidification and melting of high temperature materials: in situ observations by synchrotron radiation
Authors:
AuthorsInstitution or Email of Authors
Shuleshova, OlgaIFW Dresden
Löser, WolfgangIFW Dresden
Holland-Moritz, Dirkdirk-holland-Moritz@dlr.de
Herlach, Dieterdieter.herlach@dlr.de
Eckert, JürgenIFW Dresden
Date:March 2012
Journal or Publication Title:Journal of Materials Science
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:47
DOI:10.1007./s10853-011-6184-2
Page Range:pp. 4497-4513
Status:Published
Keywords:Unterkühlung von Materialien
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Dieter Herlach
Deposited On:26 Mar 2012 15:00
Last Modified:26 Mar 2013 13:38

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