Abstract
The influence of oxygen on the surface tension of liquid copper has been determined by the sessile drop technique. The surface tension of pure liquid copper at 1108 °C is found to be equal to 1.320 ± 0.015 N/m. The effect of oxygen is investigated for partial pressures of oxygen ranging from 10−13 to 5 X 10−6 atm. The surface activity of oxygen is deduced to equal 3200 ± 600 N/m and the saturation adsorption to equal 5.72 X 10"6 mole/m2, which corresponds to a saturation area of 29 ±5Å2 per adsorbed oxygen atom. The adsorption of oxygen on liquid copper is consistent with the formation at the metal surface of a two-dimensional compound of stoichiometry Cu3O. It is also concluded that equivalent attractive forces operate between neighboring adsorbed atoms.
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C.H.P. Lupis formerly Professor of Metallurgy and Materials Science, Carnegie-Mellon University, Pittsburgh, PA 15213
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Gallois, B., Lupis, C.H.P. Effect of oxygen on the surface tension of liquid copper. Metall Trans B 12, 549–557 (1981). https://doi.org/10.1007/BF02654326
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DOI: https://doi.org/10.1007/BF02654326