Physical properties of refractory carbides of metals of groups IV and V of the Mendeleev periodic table during rapid heating by an electric current pulse

A.I. Savvatimskiy^†, S.V. Onufriev, N.M. Aristova
Joint Institute for High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13/19, Moscow, 127412, Russian Federation

A method for studying the thermophysical properties of refractory carbides under pulsed electric heating for 5—10 microseconds is considered. Results are presented for (ZrC; Zr+C; TaC+HfC; HfC) as a function of the temperature measured from ∼ 2000 K to 5000 K. Data on enthalpy, specific heat C_p, 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 on the results obtained for all carbides are presented, and the choice of carbides for creating thermal protection is discussed.

Keywords: pulse heating, refractory carbides, melting temperature, liquid state, thermophysical properties, electrical resistance
PACS: 64.70.D−, 65.40.−b, 81.05.Je (all)
DOI: 10.3367/UFNe.2021.06.038990
URL: https://ufn.ru/en/articles/2022/6/c/
Web of Science

001100839200002
Scopus

2-s2.0-85182870598
ADS NASA

2022PhyU...65..597S
Citation: Savvatimskiy A I, Onufriev S V, Aristova N M "Physical properties of refractory carbides of metals of groups IV and V of the Mendeleev periodic table during rapid heating by an electric current pulse" Phys. Usp. 65 597–616 (2022)

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Received: 22nd, March 2021, revised: 1st, June 2021, accepted: 7th, June 2021

Оригинал: Савватимский А И, Онуфриев С В, Аристова Н М «Исследование физических свойств тугоплавких карбидов металлов IV и V групп периодической таблицы Менделеева при быстром нагреве импульсом электрического тока» УФН 192 642–662 (2022); DOI: 10.3367/UFNr.2021.06.038990

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