A new millisecond high-temperature pulse calorimeter
Peter Reiter, Erhard Kaschnitz
A new pulse-heating system for resistive self-heating of metallic specimens has been constructed for the accurate measurement of thermophysical properties. A controlled high current pulse is used to heat alloys in a time interval of approximately 1 s from room temperature into the melting range. From time-resolved measurements of current and voltage drop across the specimen, enthalpy and electrical resistivity are determined. A high-speed pyrometer is used to measure the (time-dependent) temperature of the specimen. From these measured quantities, specific enthalpy, heat capacity, and electrical resistivity as a function of temperature are obtained.