Published in Russian Metallurgy (Metally)
AbstractThe cathode reduction of Ce(III) ions to form a metal at an inert Mo electrode in the molten 3LiCl–2KCl eutectic is studied in a temperature range of 723–823 K by stationary and nonstationary electrochemical methods. In voltammograms, a single cathodic current peak is recorded at a potential of –3.19 ± 0.10 V, and an anodic current peak ass...
Published in Russian Metallurgy (Metally)
AbstractThe densities of the KF–KCl–KI melts with KF/KCl molar ratios of 0.8 and 2 are measured as a function of the KI content by hydrostatic weighing. The measurements were performed in an inert atmosphere using structural materials resistant against the melts. The densities of the 45 mol % KF–55 mol % KCl–KI and 66.6 mol % KF–33.4 mol % KCl–KI m...
Published in Russian Metallurgy (Metally)
AbstractThe temperature dependence of the electrical conductivity of the molten eutectic GdCl3(0.515)–KCl(0.485) containing up to 3.3 mol % gadolinium oxide is studied. The temperature dependences of the conductivity of the molten GdCl3–KCl–Gd2O3 system are approximated by second-order polynomials. The formation of gadolinium oxychlorides is confir...
Published in Russian Metallurgy (Metally)
AbstractThe pyrometallurgical refining of platinum–rhodium alloys from a contaminating copper impurity during induction remelting in the presence of oxygen is studied. Atomic emission analysis data for a platinum–rhodium alloy at each cycle of refining are presented. The results of atomic absorption, X-ray fluorescence, X-ray energy dispersive, X-r...
Published in Russian Metallurgy (Metally)
AbstractThe microstructure, the phase composition, the component distribution, and the grain structure of the commercial eutectic Al–12.2 Si–0.2 Fe (at %) silumins formed at cooling rates of 102 and 105 K/s are studied. Three phases are detected in the alloy after solidification at both cooling rates: α-aluminum, silicon, and an iron-containing pha...
Published in Russian Metallurgy (Metally)
AbstractThe corrosion electrochemical behavior of molybdenum depending on the melt composition (imitators of spent nuclear fuel (SNF) components) in an oxidizing atmosphere is studied. Thermodynamic analysis of possible corrosion processes is performed using the HSC Chemistry 9.0 software in the Equilibrium calculations module. The rate of metal co...
Published in Russian Metallurgy (Metally)
AbstractThe modern concepts of the structure of liquid metals and alloys are considered. Several types of microinhomogeneity and microheterogeneity are shown to exist in liquid metal solutions. Their structural state changes as a result of variations in composition, history, temperature, and pressure or the influence of various external actions. Up...
Published in Russian Metallurgy (Metally)
AbstractThe standard rate constants of charge transfer for the Ti(IV)/Ti(III) redox couple in the KCl–KF(10 wt %)–K2TiF6 melt are determined by cyclic voltammetry. The activation energy of charge transfer is calculated. The influence of strongly polarizing cations Mg2+, Ca2+, Sr2+, and Ba2+ on the charge transfer kinetics in the Ti(IV)/Ti(III) redo...
Published in Russian Metallurgy (Metally)
Abstract—Nickel-based self-fluxing materials Ni–0.5C–15Cr–3.2Si–2B (PGSR-2) and Ni–1C–17Cr–4.1Si–3.6B (PGSR-4) are studied theoretically and experimentally. These materials are widely used to form wear-resistant coatings on various parts of machines and mechanisms, which are deposited by flame spraying, plasma spraying, and surfacing. To study the ...
Published in Russian Metallurgy (Metally)
AbstractStatistical analysis of the results of molecular dynamics (MD) calculation of gas-phase “self-assembling” of nanoclusters during metal vapor condensation revealed the laws of energy transfer between metallic clusters and inert gas atoms. A model is proposed to determine the parameters of heat exchange between clusters and the environment at...
