Specific Heat Capacity of Liquid Zirconium up to 4100 K

Abstract

The temperature dependence of the specific heat capacity of liquid zirconium is investigated experimentally at atmospheric pressure and at temperatures from 2128 to 4100 K. Measured under conditions of pulsed (microseconds) electric heating of foil samples are the electric resistance, the specific energy input (equal to specific enthalpy E), and the temperature (with the aid of a high-speed pyrometer and solid-state light guide). Use is made of the specific enthalpy dependence of temperature, previously obtained [1] for two options of blackbody model, developed for investigation of liquid carbon. The first one of those models is a square tube made up of four zirconium strips, with the light guide introduced at the tube end. The second model is made up of two strips of zirconium, with the light guide introduced on the side into the gap between the two strips (two-strip blackbody model). The temperature dependence of the heat capacity of liquid zirconium up to 4100 K is given for both blackbody models. The random and systematic errors of the measured quantities are given. The values of specific heat capacity are compared with the available experimental data for the near melting stage of the liquid zirconium, obtained using a steady-state technique.