Abstract
Electrolytic deposition of tungsten and molybdenum boride particles from ionic melts is studied. Conditions are found for preparing different boride phases. If the anode material is graphite and the voltage in the bath does not exceed 2.5 V the cathode deposit consists mainly of tungsten and molybdenum metals. A mixture of phases (M, M2B, MB, MB2, M2B5) is produced on the cathode with U=2.5−3.5 V, while with U=2.3−3.5 V, while with U=3.5−4.5 V the deposit consists of the higher boride MB4. On the whole the process of electrochemical synthesis for molybdenum and tungsten borides is governed by the following interconnected parameters: electrolytic bath composition, voltage in the bath, temperature, and duration of electrolysis.
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