Abstract
In the present study, the surface tensions of pure liquid Al, Si, and liquid Al–Si alloys were systematically investigated by means of the oscillating drop method in combination with electromagnetic levitation. Prior to the measurement, the ambient oxygen partial pressure in the chamber was measured using an yttrium-stabilized zirconia oxygen sensor to estimate the surface oxygen partial pressure based on the thermodynamic assesssment. Under the experimental Ar gas with oxygen partial pressure of 10–1 Pa, the oxygen-reduced surfaces of pure liquid Al and Si can be obtained. However, the surface tensions of alloys in Al-rich composition are strongly affected by the oxygen adsorption under the same oxygen partial pressure. With the increasing Si concentration, the surface tension of the alloy approaches to the values of the oxygen-reduced surface.
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Acknowledgements
Within the framework of the bundled project PAK 461, this study was financially supported by the Deutsche Forschungsgemeinschaft DFG under grant number BR 3665/3-2. The authors are grateful to Dr. Zach Evanson for a critical review of this study and his valuable suggestions. The authors also thank Pr. Dr. Hiroyuki Fukuyama for his critical suggestion on this study. The authors are grateful to Dr. Kolbe Matthias for help during the sample analysis using electron microscope.
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Kobatake, H., Brillo, J., Schmitz, J. et al. Surface tension of binary Al–Si liquid alloys. J Mater Sci 50, 3351–3360 (2015). https://doi.org/10.1007/s10853-015-8883-6
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DOI: https://doi.org/10.1007/s10853-015-8883-6