*Article* **Thermophysical Measurements in Liquid Alloys and Phase Diagram Studies**

**Yuri Kirshon 1,**†**, Shir Ben Shalom 1,**†**, Moran Emuna 2, Yaron Greenberg 2, Joonho Lee 3, Guy Makov 1,\* and Eyal Yahel 2**


Received: 12 November 2019; Accepted: 28 November 2019; Published: 2 December 2019

**Abstract:** Towards the construction of pressure-dependent phase diagrams of binary alloy systems, both thermophysical measurements and thermodynamic modeling are employed. High-accuracy measurements of sound velocity, density, and electrical resistivity were performed for selected metallic elements from columns III to V and their alloys in the liquid phase. Sound velocity measurements were made using ultrasonic techniques, densitymeasurements using the gamma radiation attenuationmethod, and electrical resistivity measurements were performed using the four probe method. Sound velocity and density data, measured at ambient pressure, were incorporated into a thermodynamic model to calculate the pressure dependence of binary phase diagrams. Electrical resistivity measurements were performed on binary systems to study phase separation and identify phase transitions in the liquid state.

**Keywords:** thermal analysis; sound velocity; electrical resistivity; density; liquid metals; calculation of phase diagrams (CALPHAD)
