Surface tension and density of liquid Sn-Ag-Cu alloys

The surface tension and density of Sn-Ag-Cu alloys, lying along two cross-sections of silver to copper molar ratios equal to 1 and 7/3, were studied. Sessile drop measurements were carried out over a broad temperature range. It was found that both surface tension and density decrease with increasing concentration of Sn. With the increase in temperature, the density decreases linearly for all compositions, whereas the surface tension shows linear and curvilinear dependence for different compositions. The results are compared with literature data obtained with a different technique and the results of model calculations. Relatively good agreement is observed between the models and experimental data.