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Viscosity of Al-Cu liquid alloys - Measurement and thermodynamic description

Schick, Michael and Brillo, Juergen and Egry, Ivan and Hallstedt, Bengt (2012) Viscosity of Al-Cu liquid alloys - Measurement and thermodynamic description. Journal of Materials Science, 47, pp. 8145-8152. DOI: 10.1007/s10853-012-6710-x.

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In the present work a high temperature oscillating cup viscometer has been used to measure the viscosities of liquid binary Al-Cu alloys. The dependence of viscosity on temperature is well described by the Arrhenius law. For constant temperature, the viscosity as a function of copper concentration exhibits a maximum at a mole fraction xCu=0.7. This might be due to a pronounced chemical short range order in the liquid phase at this composition. As the comparison of existing phenomenological models describing viscosity as a function of composition to the experimental data is unsatisfactory, a new model for the viscosity has been developed within this work based only on a few assumptions and using the enthalpy of mixing as input parameter which is easily accessible. The agreement between model calculation and experimental data is excellent.

Document Type:Article
Title:Viscosity of Al-Cu liquid alloys - Measurement and thermodynamic description
AuthorsInstitution or Email of Authors
Schick, MichaelRWTH Aachen, Materials Chemistry
Brillo, JuergenDLR-MP
Egry, IvanDLR-MP
Hallstedt, BengtRWTH Aachen, Materials Chemistry
Journal or Publication Title:Journal of Materials Science
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 8145-8152
Keywords:Aluminum, binary liquid alloys, copper, Gibbs energy, thermophysical properties, viscosity, viscometer.
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 Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Dr.rer.nat. Jürgen Brillo
Deposited On:05 Oct 2012 09:05
Last Modified:12 Dec 2013 21:47

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