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Spinodally decomposed patterns in rapidly quenched Co–Cu melts

Davidoff, Eugen and Galenko, Peter and Herlach, Dieter and Kolbe, Matthias and Wanderka, Nelly (2013) Spinodally decomposed patterns in rapidly quenched Co–Cu melts. Acta Materialia, 61, pp. 1078-1092. Elsevier. DOI: http://dx.doi.org/10.1016/j.actamat.2012.10.010

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Abstract

The Co–Cu system is analyzed in the region of the metastable miscibility gap with separation of the undercooled melt into the Co-rich and Cu-rich liquids. Phase separation of undercooled and quenched samples of the Co50Cu50 melt are investigated experimentally usingnan electromagnetic levitation technique, quenching on a Pb-solder-coated copper chill substrate and splat-quenching methods. It is found that quenching of the liquid samples with cooling rate J106 K s1 leads to a freezing of splats having the microstructure of spinodally decomposed liquids. The composition of the Co-rich phase measured by transmission electron microscopy is Co71.7Cu28.3 and that of the Cu-rich phase is Co26.8Cu73.2. These compositions are inside the spinodal region and close to the calculated spinodal boundary in the phase diagram of the Co–Cu system at temperatures below T  1450 K. Experimental results are compared with predictions of computational modeling using a model of fast spinodal decomposition.

Item URL in elib:https://elib.dlr.de/80936/
Document Type:Article
Title:Spinodally decomposed patterns in rapidly quenched Co–Cu melts
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Davidoff, EugenEugen.Davidoff (at) mtssensor.deUNSPECIFIED
Galenko, Peterpeter.galenko (at) uni-jena.deUNSPECIFIED
Herlach, Dieterdieter.herlach (at) dlr.deUNSPECIFIED
Kolbe, Matthiasmatthias.kolbe (at) dlr.deUNSPECIFIED
Wanderka, Nellywanderka (at) hmi.deUNSPECIFIED
Date:January 2013
Journal or Publication Title:Acta Materialia
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:61
DOI :http://dx.doi.org/10.1016/j.actamat.2012.10.010
Page Range:pp. 1078-1092
Publisher:Elsevier
Status:Published
Keywords:Undercooling of Materials
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 (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Herlach, Dieter
Deposited On:29 Jan 2013 08:30
Last Modified:10 Jan 2019 15:45

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