Production of HfTaTiNbZrC5 High-Entropy Carbide Micropowder in the Plasma of an Atmospheric Pressure Arc Discharge

A. Ya Pak, P. S. Grinchuk, G. Ya Mamontov, T. Yu Yakich, A. A. Gumovskaya

Research output: Contribution to journalArticlepeer-review

Abstract

HfTaTiNbZrC5 high-entropy carbide micropowder has been synthesized using the technique of direct-current plasma arc discharge at atmospheric pressure. The synthesis was carried out in air atmosphere under conditions of the formation of a protective carbon monoxide gas layer. TiO2, ZrO2, Nb2O5, HfO2, and Ta2O5 oxide metal powders included in the composition of high-entropy carbide with characteristic grain dimensions of 5–10 μm have been used as raw feedstock. It has been shown that it takes at least 90–100 s for the formation of high-entropy carbide to occur from raw feedstock under the action of arc discharge plasma. The advantage of the proposed method of producing high-entropy carbide micropowder compared to other similar methods is the short time of synthesis of such powder with low energy expenditure (~960 kJ/g) and the possibility of using simple equipment for synthesis.

Original languageEnglish
Pages (from-to)88-94
Number of pages7
JournalJournal of Engineering Physics and Thermophysics
Volume94
Issue number1
DOIs
Publication statusPublished - Jan 2021

Keywords

  • atmospheric plasma
  • electric-arc synthesis
  • high-entropy carbide
  • vacuum-free method

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

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