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Density, Molar Volume, and Surface Tension of liquid Al-Ti

Wessing, Johanna Jeanette and Brillo, Jürgen (2016) Density, Molar Volume, and Surface Tension of liquid Al-Ti. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science. Springer. DOI: 10.1007/s11661-016-3886-8 ISSN 1073-5623

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Official URL: http://link.springer.com/article/10.1007/s11661-016-3886-8

Abstract

Al-Ti-based alloys are of enormous technical relevance due to their specific properties. For studies in atomic dynamics, surface physics and industrial processing the precise knowledge of the thermophysical properties of the liquid phase is crucial. In the present work, we systematically measure mass density, \rho (g/cm^3), and the surface tension, \gamma (N/m), as functions of temperature, T, and compositions of binary Al-Ti melts. Electromagnetic Levitation in combination with the optical dilatometry method is used for density measurements and the oscillating drop method for surface tension measurements. It is found that, for all compositions, density and surface tension increase linearly upon decreasing temperature in the liquid phase. Within the Al-Ti system, we find the largest values for pure titanium and the smallest for pure aluminum, which amount to \rho (TL,Ti) = 4.12 ± 0.04 g/ cm^3 and \gamma (TL,Ti) = 1.56 ± 0.02 N/m; and \rho (TL,Al) = 2.09 ± 0.01 g/cm^3 and \gamma (TL,Al) = 0.87 ± 0.06 N/m, respectively. The data are analyzed concerning the temperature coefficients, \rho T and \gamma T, excess molar volume, VE, excess surface tension, \gamma E, and surface segregation of the surface active component, Al. The results are compared with thermodynamic models. Generally, it is found that Al-Ti is a highly nonideal system.

Item URL in elib:https://elib.dlr.de/110065/
Document Type:Article
Title:Density, Molar Volume, and Surface Tension of liquid Al-Ti
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wessing, Johanna JeanetteJohanna.Wessing (at) dlr.deUNSPECIFIED
Brillo, JürgenJuergen.Brillo (at) dlr.deUNSPECIFIED
Date:11 December 2016
Journal or Publication Title:Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1007/s11661-016-3886-8
Publisher:Springer
ISSN:1073-5623
Status:Published
Keywords:Al, Ti, surface tension, density, excess molar Volume, excess surface Tension, surface Segregation, Butler model, Chatain model
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 Materialforschung und Mikrogravitation (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Wessing, Johanna
Deposited On:02 Jan 2017 07:13
Last Modified:06 Sep 2019 15:21

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