method for studying the thermophysical properties of refractory carbides under pulsed electric heating for 5-10 microseconds is considered. Results are presented for (ZrC; ZrС+C; TaC+HfC; HfC) as a function of the temperature measured from ~ 2000 K to 5000 K. Data on enthalpy, specific heat Cp, heat of melting, and electrical resistance are given. For all the studied carbides, a sharp increase in the specific heat of the solid phase is observed at ≈ 300 K before melting. This may be due to the formation of paired Frenkel defects under conditions of a short heating time. Comparative data of the results obtained for all carbides are presented, and the choice of carbides for creating thermal protection is discussed.
Keywords: pulse heating, refractory carbides, temperature, melting, liquid state, thermophysical properties DOI:10.3367/UFNe.2021.06.038990 Citation: Savvatimsky A I, Onufriev S V, Aristova N M "Physical properties of refractory carbides of metals of IV and V groups of the periodic table during rapid heating by an electric current pulse" Phys. Usp., accepted
Received: 22nd, March 2021, revised: 1st, June 2021, accepted: 7th, June 2021