Abstract
The surface tension and viscosity of equilibrium and supercooled liquids of Cu50Zr50 were measured in the containerless electromagnetic levitator ISS-EML in the European space laboratory Columbus on board the International Space Station (ISS) under microgravity using high-speed camera recordings. From 1250 K to 1475 K, the surface tension follows the relation σ(T) = (1.58 ± 0.01) N/m – (3.1 ± 0.6) · 10−4 N/m · K · (T – 1209 K). A frequency shift correction was applied to remove the influence of sample rotation on the measured surface tension. Within the investigated temperature range, the viscosity can be expressed by an Arrhenius temperature dependence η(T) = η0 · exp(EA/kBT), with η0 = (0.08 ± 0.02) mPa·s and EA = (0.58 ± 0.03) eV.
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Acknowledgements
M. M., R. K. W. and H.-J. F. acknowledge the continued support by the German Space Agency DLR under contract 50WM1759 and the support by the European Space Agency ESA under contract AO-2009-1020.
S.K. and P.K.G. acknowledge the support from the German Space Center Space Management, contract No. 50WM1541, and from the Russian Scientific Foundation under the project no. 16-11-10095.
The work at the Washington University in St. Louis was supported by NASA under grants NNX10AU19G and NNX16AB52G. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NASA.
The work at the Zhejiang University in China was supported by the international cooperation project of China Manned Space Program, the National Natural Science Foundation of China (U1832203), National Key Research and Development Program of China (2016YFB0701203 and 2017YFA0403400), and the Fundamental Research Funds for the Central Universities are gratefully acknowledged.
The support from German Space Agency Research Center Cologne in conducting the experiments on MSL-EML and support in experiment preparation is gratefully acknowledged by all authors.
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Mohr, M., Wunderlich, R.K., Koch, S. et al. Surface Tension and Viscosity of Cu50Zr50 Measured by the Oscillating Drop Technique on Board the International Space Station. Microgravity Sci. Technol. 31, 177–184 (2019). https://doi.org/10.1007/s12217-019-9678-1
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DOI: https://doi.org/10.1007/s12217-019-9678-1