Investigation of the thermophysical properties of zirconium by subsecond pulsed heating technique

The heat capacity, enthalpy, and spectral (for the wavelength of $0.65\mu$m) emissivity of zirconium are investigated in the temperature range from $1000$ to $2100$ K by the method of single subsecond resistance pulsed heating. The heat of the $\alpha$–$\beta$ phase transition is measured. A number of singularities are discovered in the variation of the properties of material in the region of $\alpha$–$\beta$ transition and in the $\beta$ phase, which are associated with variations in the oxide film and with the specific features of volume heat release during heating in the two-phase region.