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

• Thermophysical properties of liquid Ti are obtained by electrostatic levitation.
• How to measure the thermophysical properties is shown with non-contact method.
• Hypercooling limit of liquid Ti guarantying homogeneous nucleation is 341 K.
• Accurate ratio Cp/εT of the liquid Ti is obtained with weak temperature dependence.
• Interfacial free energy of Ti is estimated with the thermophysical parameters.

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 341 K. 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 0.164 J/m2, and Turnbull’s coefficient is 0.48.