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Surface tension of liquid Al-Cu and wetting at the Cu/Sapphire solid-liquid interface

Schmitz, Juliane and Brillo, Jürgen and Egry, Ivan (2014) Surface tension of liquid Al-Cu and wetting at the Cu/Sapphire solid-liquid interface. In: The European Physical Journal Special Topics pp. 469-479. doi: 10.1140/epjst/e2014-02103-5.

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For the study of the interaction of a liquid alloy with differently oriented single crystalline sapphire surfaces precise surface tension data of the liquid are fundamental. We measured the surface tension of liquid Al-Cu contactlessly on electromagnetically levitated samples using the oscillating drop technique. Data were obtained for samples covering the entire range of composition and in a broad temperature range. The surface tensions can be described as linear functions of temperature with negative slopes. Moreover, they decrease monotonically with an increase of aluminium concentration. The observed behaviour with respect to both temperature and concentration is in agreement with a thermodynamic model calculation using the regular solution approximation. Surface tensions were used to calculate interfacial energies from the contact angles of liquid Cu droplets, deposited on the C(0001), A(11-20), R(1-102) surfaces of an α-Al2O3 substrate. The contact angles were measured by means of the sessile drop method at 1380 K. In the Cu/α-Al2O3 system, no anisotropy is evident neither for the contact angles nor for the interfacial energies of different surfaces. The work of adhesion of this system is isotropic, too.

Item URL in elib:https://elib.dlr.de/88428/
Document Type:Contribution to a Collection
Title:Surface tension of liquid Al-Cu and wetting at the Cu/Sapphire solid-liquid interface
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:The European Physical Journal Special Topics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 469-479
Keywords:Surface tension liquid Cu interfacial energy wetting sapphire
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 - Research under Space Conditions
DLR - Research theme (Project):R - Vorhaben Materialforschung unter Mikro-g (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Brillo, Dr.rer.nat. Jürgen
Deposited On:10 Mar 2014 08:52
Last Modified:18 Mar 2024 12:48

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