Preparation Of A Nickel-Holmium Alloy Coating In An Equimolar Hocl3-Containing Nacl-Kcl Melt

Cyclic voltammetry is used to study the electrolytic reduction of holmium ions on a nickel electrode in a holmium chloride-containing equimolar molten mixture of sodium and potassium chlorides in a temperature range of 1073-1173 K. The potentials of formation of nickel-holmium intermetallic compounds (IMCs) are determined. Nickel-holmium intermetallic compounds are synthesized by controlled potential electrolysis. Under the selected electrolysis conditions, the prepared coating is shown to be single-phase and its composition corresponds to the HoNi2 stoichiometry. The coefficients of reaction diffusion of holmium in nickel are calculated and the activation energy of alloy-formation process is determined.