Theory of the surface tension of liquid metal alloys (original) (raw)

1985, Phys Rev B

We present a density-functional theory of the surface tension of liquid metal alloys. The theory is applied to miscible alloy NaxK1-x and the results are similar to typical miscible alloys. The phenomenon of segregation of the low-surface-tension component to the surface is obtained with use of a simple hyperbolic tangent concentration profile. An estimation of the surface concentration is made within the monolayer surface model.

Surface tension of two weakly interacting liquid alloys

BIBECHANA, 2012

We report surface tension of two weakly segregating alloys Al-Ga and Cd-In in molten state at temperatures of 1023 K and 800 K respectively using different approaches. Our analysis based on different assumptions reveal that the metal with lower surface tension tends to segregate on the surface of molten alloy and the metal with higher surface tension tends to segregate in the bulk. Different approaches predict consistency in the values of the surface tension of Al-Ga liquid alloy that increases with increase in bulk concentration of aluminium in the alloy with all values smaller than the ideal values. In Cd-In alloy the models reveal no such regularity in the surface tension; it varies slightly from the ideality. DOI: http://dx.doi.org/10.3126/bibechana.v9i0.7183 BIBECHANA 9 (2013) 103-112

Theoretical Calculations of the Surface Tension of Liquid Transition Metals

Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science, 2011

The surface tension of pure liquid mercury in the temperature range 273 K to 523 K (0 °C to 250 C°) was calculated using our previously reported equation. The results were compared with the experimental data and showed a good agreement. The surface tension of mercury decreases linearly with temperature, confirming a negative slope, and therefore shows the usual linear temperature dependence. The calculated surface excess entropy (0.21) is in excellent consistence with the experimental value (0.22). The surface tension also was calculated for many d-block metals (Ti, Zr, Fe, Co, Ni, Cu, Zn, Cd, Ag, Au, Pd, and Pt) at their melting points. The calculated values were compared with the existing experimental data.

Review of data for the surface tension of pure metals

A literature survey of the experimentally determined values for the surface tension y of molten pure metals has been carried out. It is intended to provide an assessed data base for use with a mathematical model currently being developed at the National Physical Laboratory, UK, to predict the surface tension of molten metal alloys. 1MR/250

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