Density and surface tension of liquid Al,V and their binary alloys measured by electromagnetic levitation

Kurzfassung

Both density and surface tension were systematically investigated over a wide temperature and compositional range for the liquid Al-V alloy system. The thermophysical properties were measured in an electromagnetic levitation device. A linear decrease in surface tension and density with increasing temperature was observed for every alloy composition investigated. Additionally, a decrease in density and surface tension was observed for increasing aluminum content among the different probed samples. This decrease is, a strong deviation from an ideal mixing behavior which was experienced for both properties. Different models, including variants of the well-established Butler model, were employed to better describe the compositional dependence of density and surface tension in the liquid Al-V system. The advantages and disadvantages were discussed for each model describing the measured thermophysical property data. Strong similarities were observed when comparing the mixing behavior and segregation effects of the investigated Al-V system with already established works for the liquid Al-Ti system. The results suggest that both vanadium and titanium show similar mixing behavior when alloyed with aluminum.