D. B. Lopukh, A. V. Vavilov, A. P. Martynov, V. I. Almjashev, A. S. Svinolupova
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Abstract—The high-temperature oxide–metal melts that form in cold crucible induction melting (CCIM) furnaces. The results of pilot tests in CCIM furnaces at melt temperatures above 2400°C in air, which are conducted to study the distribution of components between the oxide and metal phases of a two-phase melt with limited component miscibility, are presented. The results of physicochemical studies of the materials fabricated by quenching solidification of a high-temperature melt are presented, and they confirm the reduction of silicon and the oxidation of iron with the redistribution of these components between the oxide and metal phases. This experimental result contradicts the well-known Ellingham diagrams and thermodynamic calculations, but a similar effect is experimentally observed in the U–O–Fe system. Thus, the CCIM method allows the inversion of redox processes in a number of oxide–metal systems, which can be used to produce new materials and to create technologies for high-temperature extraction of target components.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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