Abstract
Compounds of chrome with silicon and boron (silicides and borides) represent an important group of inorganic compounds with a number of valuable properties. Powders of silicides and borides of chrome may be used to produce structural materials with specified electrophysical and refractory properties, and resistance to corrosion and wear so that they are highly promising for use in new areas of technology. Electrochemical synthesis of chrome silicides was carried out from a molten KCl-KF-K{sub 2}CrO{sub 4}-K{sub 2}SiF{sub 6} mixture. Electroreduction of the fluoroxide complex Cr(VI) to Cr{sub 2}O{sub 3} takes place according to the reversible three-electrode mechanism and is controlled by diffusion. Optimization of the process was reduced to determining the conditions of producing high silicdes CrSi{sub 2} having the most valuable physicomechanical properties.
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