Crystal–liquid interfacial free energy and thermophysical properties of pure liquid Ti using electrostatic levitation: Hypercooling limit, specific heat, total hemispherical emissivity, density, and interfacial free energy

Abstract

Thermophysical properties of liquid Ti are measured by a newly developed electrostatic levitation. In this study, we measure a hypercooling limit (ΔThyp), specific heat (Cp), total hemispherical emissivity (εT), and density (ρ) of liquid Ti. The ΔThyp of the liquid Ti is 341K. The Cp of the liquid Ti shows very weak temperature dependence during supercooling. The εT and ρ of the liquid Ti are given by 0.329 and ρ(T) (g/cm3)=(4.16−2.36)·10−4 (T−Tm). Finally, the interfacial free energy is estimated with the measured thermophysical parameters. The interfacial free energy is 0.164J/m2, and Turnbull’s coefficient is 0.48.