Effect of Exogenous Refractory Nanoparticles on Copper Removal from Iron Melts and the Influence of the Nanoparticles on the Capillary Properties of the Metal
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Abstract
The thermodynamic calculations on the dissociation of the compounds, copper evaporation processes, and literature data on metal–ceramic wetting are used to substantiate the choice of refractory nanophases. The reactions of the Al2O3 and MgAl2O4 nanoparticles with the surfactant (copper) in the model Fe‒Cu melts and alloyed steel are studied. The maximum degree of Cu removal is found to be 24 rel. % in the Fe–Cu system and 23 rel. % in the 12Kh18N10T steel, depending on the residence time of the nanoparticles in the melt. The capillary properties are studied by the sessile drop method. The introduction of the nanoparticles into the Fe–Cu melt is shown to result in the inversion of the ∂σ/∂T coefficient and density compression as compared to those for pure iron.
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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