| Abstract Scope |
Iron-cobalt-nickel alloys possess excellent electrochemical performance, mechanical properties, and oxidation resistance, and are widely used in aerospace and high-end medical fields. In this paper, Co3O4, Fe2O3 and NiO were used as raw materials, and Fe-Co-Ni alloys was prepared by molten salt electro-deoxidation process in NaCl-CaCl2 molten salt system at 800 ℃. The reduction process was analyzed by thermodynamic calculation to clarify the reaction process. It was found that elemental Ni was preferentially reduced (NiO→Ni); then elemental Co was formed (Co2O3→CoO→Co); during the electrolytic reduction process, the O2- generated would react with Ca2+ in the molten salt and Fe2O3 in the cathode raw materials to form CaFe2O4, and the Fe component was reduced step by step (Fe2O3/CaFe2O4→Fe3O4→FeO→Fe), and finally formed Fe-Co-Ni alloys with Ni and Co. |