HIGH-PRESSURE, HIGH-TEMPERATURE THERMOPHYSICAL MEASUREMENTS ON MOLYBDENUM

Wire-shaped molybdenum samples were resistively pulse heated in a coaxial capacitor discharge circuit. Heating rates greater than 10(9) K s-1 were attained, and temperatures up to 10 000 K reached. Time-correlated measurements were made with submicrosecond resolution of the current through the wire and voltage drop across it, as well as measurements of surface radiation and wire expansion. These quantities allow determination of such thermophysical properties as the heat capacity at constant pressure and the mutual dependencies between temperature, volume, specific enthalpy and electrical resistivity in superheated liquid molybdenum.