Thermophysical properties of high-entropy carbide $(\rm HfTaTiNbZr)\rm C$ at temperatures of $2500$–$5500$ K

Experimental thermophysical data for high-entropy carbide $(\rm HfTaTiNbZr)\rm C$ are presented for the first time at high temperatures $(2500$–$5500$ K$)$. A fast $(10~\mu$s$)$ method of heating by a current pulse was used. Samples in the form of flat plates with a thickness of $\sim100~\mu$m were clamped between glass plates to fix the sample and prevent the occurrence of a shunt discharge. Solidus and liquidus temperatures and properties of carbide were measured—melting heat, input energy (enthalpy) and specific heat—depending on temperature. The temperature was measured using a high-speed pyrometer at a wavelength of $856$ nm.