Chapter 19
High-Temperature Electrochemical
Synthesis of Nanopowders of Tungsten
Carbide in Ionic Melts
Viktor Malyshev, Angelina Gab, Dmytro Shakhnin, Tetiana Lukashenko,
Oleksandr Ishtvanik, and Marcelle Gaune-Escard
Abbreviations
CNRS The National Center for Scientific Research of the French Ministry of
Education and Research
19.1 Introduction
In [1, 2], it is shown that it is theoretically possible to achieve high-temperature
electrochemical synthesis of highly dispersed powders of tungsten monocarbide.
Lengthy experiments with high-temperature electrochemical synthesis of tungsten
carbides have demonstrated significant variation in both the composition of the
electrolyte and in the phase composition of the cathode deposit due to loss of some
of the electrolyte with formation of a carbide-salt “bulb” (> 90% salt phase) and
thermal decomposition and evaporation of the components of the melt. Adjustment
of the melt and washing of the tungsten carbide free from electrolyte are, therefore,
critical problems.
V. Malyshev · A. Gab · D. Shakhnin () · T. Lukashenko · O. Ishtvanik
University “Ukraine”, Kyiv, Ukraine
e-mail: ishtvanik@meta.ua
M. Gaune-Escard
Ecole Polytechnique, CNRS UMR 6595, Technopôle de Chateau Gombert,
Marseille Cedex 13, France
© Springer International Publishing AG, part of Springer Nature 2018
O. Fesenko, L. Yatsenko (eds.), Nanochemistry, Biotechnology, Nanomaterials,
and Their Applications, Springer Proceedings in Physics 214,
https://doi.org/10.1007/978-3-319-92567-7_19
311
High-Temperature Electrochemical
Synthesis of Nanopowders of Tungsten
Carbide in Ionic Melts
Viktor Malyshev, Angelina Gab, Dmytro Shakhnin, Tetiana Lukashenko,
Oleksandr Ishtvanik, and Marcelle Gaune-Escard
Abbreviations
CNRS The National Center for Scientific Research of the French Ministry of
Education and Research
19.1 Introduction
In [1, 2], it is shown that it is theoretically possible to achieve high-temperature
electrochemical synthesis of highly dispersed powders of tungsten monocarbide.
Lengthy experiments with high-temperature electrochemical synthesis of tungsten
carbides have demonstrated significant variation in both the composition of the
electrolyte and in the phase composition of the cathode deposit due to loss of some
of the electrolyte with formation of a carbide-salt “bulb” (> 90% salt phase) and
thermal decomposition and evaporation of the components of the melt. Adjustment
of the melt and washing of the tungsten carbide free from electrolyte are, therefore,
critical problems.
V. Malyshev · A. Gab · D. Shakhnin () · T. Lukashenko · O. Ishtvanik
University “Ukraine”, Kyiv, Ukraine
e-mail: ishtvanik@meta.ua
M. Gaune-Escard
Ecole Polytechnique, CNRS UMR 6595, Technopôle de Chateau Gombert,
Marseille Cedex 13, France
© Springer International Publishing AG, part of Springer Nature 2018
O. Fesenko, L. Yatsenko (eds.), Nanochemistry, Biotechnology, Nanomaterials,
and Their Applications, Springer Proceedings in Physics 214,
https://doi.org/10.1007/978-3-319-92567-7_19
311