Abstract
Using electromagnetic levitation under microgravity conditions, the interfacial properties of an Cu75Co25 alloy have been investigated in the liquid phase. This alloy exhibits a metastable liquid miscibility gap and can be prepared and levitated in a configuration consisting of a liquid cobalt-rich core surrounded by a liquid copper-rich shell. Exciting drop oscillations and analysing the frequency spectrum, both surface and (liquid–liquid) interfacial tension can be derived from the observed oscillation frequencies. This paper briefly reviews the theoretical background and reports on a recent experiment carried out on board the TEXUS 44 sounding rocket.
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Acknowledgements
The authors thank the EADS team in Bremen and Friedrichshafen, the launch team at Esrange, and, last but not least, the DLR-MUSC team for their continuous and excellent support. The authors also would like to thank ESA for providing this flight opportunity. Without their help, this experiment would not have been possible.
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Egry, I., Ratke, L., Kolbe, M. et al. Interfacial properties of immiscible Co–Cu alloys. J Mater Sci 45, 1979–1985 (2010). https://doi.org/10.1007/s10853-009-3890-0
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DOI: https://doi.org/10.1007/s10853-009-3890-0