To produce 25,3NiO–41,2Fe2O3–13,5Cr2O3–20Cu oxide-metal composite (wt.%), the temperature and sintering duration (1350 °С, 30 min.) have been determined, which provide the formation of chromium oxide solid solution in nickel ferrite phase. The composite has been tested as an anode during low-temperature (800 °C) alumina saturated 12,0NaF–36,8KF–51,2AlF3 (wt.%) melt electrolysis. The amount of oxygen gas evolved from the anode was measured. The oxygen gas evolution is shown to be the main reaction on the anode at current density of 0,015 to 1,0 A·сm–2, and a substantial increase in the oxidation rate of the composite anode is observed at i = 0,015÷1,0 A·сm–2. The electrolyzer voltage (4,5±0,5 V) and the anode potential (2,43±0,2 relatively to the Al-reference electrode) during a long-term experiment (89 h, i = 0,4 A·сm–2) show stable and admissible composite electric conductivity; and the dissolution rate calculated from the mass loss (0,6 cm/year) and volume loss (0,7 cm/year) meets the requirements to inert anodes.

The opportunity to simulate the process of titanium aluminide based TNM-B1 alloy casting production according to ProCast program is considered. Comparison of crystallization parameters obtained by means of ProCast and Thermo-Calc thermo-dynamic bases is made. The alloys available in ProCast base are shown to be more preferable for simulation. An estimation of conditional fluidity for different versions of TNM-B1 alloy composition is made; and it is shown that alloys should be alloyed by upper limit of admissible concentrations for reaching its maximum values. The material of a casting mold named «Corundum ceramics» (NITU «MISiS», Moscow) is proposed, the properties of which are distinct from those available in the base of ProCast foundry process computer simulation system.

The thermodynamic modeling of interaction of yttrium ceramic with Nb–Si based molten alloys alloyed with Ti, Cr, Hf, Al has been performed. Formation of solid HfO2 oxide is shown to be the result of such interaction, and other elements are not involved practically in the chemical interaction. It is found in the course of modeling that yttrium reduction due to ceramic dissolution in the molten metallic solution is the main mechanism of interaction. The Y content in the solution depends on the temperature, metallic phase composition, and quantity.

For designing the bimetallic product drawing process, analytical expressions are established for calculation of drawing stress and optimum die hole angle to estimate expeditiously the effect of different process factors on the process power parameters as well as on the value of longitudinal stresses in the layers of bimetallic composite. Disadvantages of the proposed formulas are noted.

The article describes the investigation and simulation of Zr-based bulk metallic glass crystallization kinetics using DSC and DIC techniques. The investigation of the kinetics of crystallization processes may eventually provide deeper understanding of the bulk metallic glass crystallization mechanism and promote the evidence-based selection of heat treatment to form desired structure and properties of bulk metallic glasses based composites.

The work purpose is a study of the effect of hot isostatic pressing (HIP) on the microstructure and phase composition of titanium aluminide based alloys using experimental and computational methods. Isothermal and polythermal sections of the Ti–Al–Nb–Mo system, liquidus, solidus, and other phase change temperatures are calculated by dint of Thermo-Calc program. General character of microstructure after vacuum annealing and HIP-processing at t = 1250 °C is shown to be about identical: γ + α2 eutectoid colonies and relatively compact particles of β and γ phases. However vacuum annealing, unlike HIP, does not result in elimination of casting porosity. The data of metallographic and X-ray microspectroscopic analyses confirm the computational results as a whole.

The development of recrystallization processes in the wall along the radius extruded AMg6 alloy tubes has been investigated with structural analysis. It has been found out that the degree of recrystallization is uneven over the tube wall cross section; and three characteristic zones can be emphasized: two of them are adjacent to the outer and inner surfaces of tubes and the third zone is intermediate between them. Lowering of extrusion temperature from 470 down to 440 °C contributes to more active development of recrystallization in these zones. It was found that the greatest variation of the volume fraction of recrystallized grains is typical for samples cut from the bottom of the extruded tubes. A correlation between the mean values of microhardness and volume fraction of recrystallized grains in selected tube zones along the radius is shown.

The effect of bending deformation and subsequent heat treatment on the behavior of micromechanical properties and fine structure of explosion welded АD1-MA2-0 magnesium-aluminum composite material has been investigated. It is established that after heat treatment (t = 300 and 400 °C, τ = 1 h) explosion welded and bent composite material shows formation of an intermetallic layer, which significantly affects the fine structure characteristics.

The results of investigations of phase composition, structure, and properties of VT6 titanium alloy surface layer subjected to combined processing, which consists of alloying by plasma of electric explosion of carbon-graphite fiber with SiC powder specimen and subsequent high-intensity electron-beam irradiation, are given. As a result of such a treatment, a multiphase surface layer with submicro- and nanosized structure the microhardness of which many times exceeds the value in the sample bulk.

It has been established that the basic criteria of realization of mechano-chemical tungsten carbide synthesis are the structure of carbon modifications and the degree of their aromaticity. The prospects of application of carbon modifications obtained as a result of pyrolysis of vegetative raw materials for synthesis of tungsten carbide with minimum contents of sulfur are shown.

An analysis of the effect of increasing the sulfur content in coke used in the production of anode mass on the sodium sulfate content in gas cleaning solutions at aluminum plants has been carried out. The methods to remove Na2SO4 from gas cleaning solutions and over-slime waters in slime storage tanks and the problems in their realization are described. Application of galvano-coagulation process for this purpose is shown to allow realizing up to 80 thousand m3 of slime storage tanks as well as reducing the energy consumption by 5–7 % for transportation of salt-free solutions in pipeline network.

The waste recycling problem of aluminum production is discussed. The effect of cathode lining fluorocarbons on the environment is estimated. A short review of the practices concerning waste processing of aluminum production is given. The opportunities to organize nonwaste technology at aluminum plants are considered. The results of laboratory tests of waste samples of used potlining are presented.