Thermophysical properties of tantalum–tungsten substitution and interstitial alloys in the temperature range $1000$–$2500$ K

The results of experimental investigation of ten thermal and physical properties (thermal and electric conductivities, specific heat and volume heat capacity, density, volumetric thermal expansion coefficient, thermal activity, and integral and spectral blackness) of substitution alloys $\rm Ta10\rm W{,}~\rm Ta15\rm W{,}$ and $\rm Ta20\rm W$ and interstitial alloy $\rm Ta10\rm W0.25\rm C$, which are obtained using a!closed method of radial temperature waves, are considered. It is shown that in the temperature range under investigation, the polytherms of the properties of the alloys (except those for the specific heat and thermodynamic potentials) lie in the region bounded by the polytherms of the properties of components and differ insignificantly from the polytherms of the properties of the base (pure tantalum), while the polytherms of the properties of the interstitial alloy in region $T \le 1900$ K do not obey this regularity and demonstrate an anomalous character.