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Inorganic Materials: Applied Research

, Volume 10, Issue 3, pp 566–571 | Cite as

Effect of the Conditions of Formation of W–C Nanopowders in a Plasma Jet on the Synthesis of Hexagonal Tungsten Carbide

  • Yu. V. BlagoveshchenskyEmail author
  • N. V. AlexeevEmail author
  • A. V. SamokhinEmail author
  • N. V. IsaevaEmail author
  • M. A. SinayskyEmail author
  • Yu. V. TsvetkovEmail author
PLASMOCHEMICAL METHODS OF PRODUCTION AND TREATMENT OF MATERIALS
  • 6 Downloads

Abstract

The effects of the conditions of a raw material introduction as well as mixing of it with a high-temperature gas flow under the plasma chemical synthesis of superdispersed powder of W–C have been studied. In the case of incomplete raw material evaporation and its fast quenching, preferred cubic tungsten carbide β-WC formation is found to occur, as well as nano- and microparticles with a complicated phase composition. In the case of complete raw material evaporation, the products of reducing synthesis are nanopowder of tungsten or semicarbide W2C depending on the amount of hydrocarbon introduced. There is a second stage of the process of low-temperature synthesis which leads to a single-phase of tungsten carbide α-WC formation. Complete evaporation of raw material must be ensured in the plasma chemical process for obtaining of α-WC powder with a maximum specific surface area.

Keywords:

plasma chemical synthesis tungsten carbide ultrafine powders evaporation mixing conditions low-temperature synthesis 

Notes

FUNDING

The work was supported by the state task no. 007-00129-18-00.

CONFLICT OF INTERESTS

The authors declare that they have no conflict of interest.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (IMET RAS)MoscowRussia

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