Abstract
Despite its apparent simplicity, spreading of liquid metals at high temperatures has defied description and generalization. Wetting at high temperature is usually accompanied by interdiffusion and chemical reaction, but the forces that drive reactive spreading and the mechanisms that control its kinetics have been very poorly understood. The unsolved challenge has been to link macroscopic measurements such as the dynamic contact angle or the speed of a moving liquid front to phenomena occurring at the microscopic and even atomic level in the vicinity of the triple solid–liquid–vapour junction. We have taken a big step towards meeting this challenge. Our systematic analysis of the spreading of metal–metal systems with varying degrees of mutual solubility allows us to report on the fundamental differences between the mechanisms controlling spreading of organic liquids and liquid metals and on formation of Marangoni films driven by surface-tension gradients in high-temperature systems.
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Acknowledgements
This paper benefited from discussions with M. Ruehle and R. M. Cannon and was supported by the Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098.
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Saiz, E., Tomsia, A. Atomic dynamics and Marangoni films during liquid-metal spreading. Nature Mater 3, 903–909 (2004). https://doi.org/10.1038/nmat1252
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DOI: https://doi.org/10.1038/nmat1252
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