THERMOPHYSICAL PROPERTIES OF W-RE ALLOYS ABOVE THE MELTING REGION

In earlier experiments we have studied pure elements with a fast pulse heating technique to obtain thermophysical properties of the liquid s tate. We report here results for thermophysical properties such as spe cific heat and dependences among enthalpy, electrical resistivity, and temperature, for four W-Re alloys (3.95, 21.03, 23.84, and 30.82 at % of Re) in a wide temperature range covering solid and liquid states. Thermal conductivity is calculated using the Wiedemann-Franz law for t he liquid alloy, as.well as data for thermal diffusivity for the begin ning of the liquid phase. Additionally, data for the entire temperatur e range studied have been analyzed in comparison with those of the con stituent elements, tungsten and rhenium, since both metals have been s tudied previously with the same experimental technique. Such informati on is of interest in the field of metallurgy since W-Re alloys of low Re content in the region of mutual component solubility in the solid s tate are widely used as thermocouple materials for the purposes of hig h-temperature thermometry.