Abstract
This work aims to demonstrate the feasibility and effectiveness of electrochemical silicification of Mo in molten CaCl2–CaSiO3. Through constant-current electrolysis at 1123 K, high-quality α-MoSi2 coatings are successfully deposited on Mo plates, following the sequential formation of Mo5Si3 and β-MoSi2 phases. Increased current density results in grain refinement and reduced surface roughness due to the increase in overpotential. The oxidation test indicates that the silicide-coated Mo plate can withstand exposure to air at 1573 K for more than 15 h with minimal damage, showcasing the excellent high-temperature oxidation resistance. These findings highlight the potential application of the electrochemical silicification process.
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