Results of design and experimental studies of a nickel-based superalloy VZhL20 with a density of 8.04 g/cm3 for the manufacture of turbine blades with a columnar granular structure and a single-crystal structure are presented. It is shown that alloy VZHL20 with a single-crystal structure of the crystallographic orientation [001] in the heat-treated state possesses high phase stability, and enhanced short-term strength (\( \sigma_{0,2}^{20} = 950 \, \text{МПа} \) и \( \sigma_{\delta}^{20} = 1130 \, \text{МПа} \)) and long-term strength (\( \sigma_{100}^{900} = 340 \, \text{МПа} \) и \( \sigma_{100}^{1000} = 185 \, \text{МПа} \))

The relationship between the long-term strength and the structural-phase and physico-chemical parameters of castable polycrystalline nickel-based superalloys is considered. A regression model for prediction of the durability at a temperature of 1100 °C and a stress of 80 MPa of the considered class of alloys is proposed. The model takes into account the amount of the γ'-phase, the γ'-solvus and solidus temperatures, γ/γ'-misfit, the lattice spacing of the γ- and γ'-phases, and the atomic mass of the alloy. The reliability of the durability prediction is confirmed by comparison with the experimental results on the long-term strength at temperatures 1000, 1050 and 1100 °C of a number of industrial and experimental castable polycrystalline nickel-based superalloys.

Intermetallide alloys based on the Al₂Ti compound are the most promising heat-resistant materials for future energy plants.The review examines the mechanical properties of the Al₂Ti Intermetalide, two-phase alloys based on it and the doped niobium alloy. For use at temperatures of up to 950 °С, alloys with phase composition r-Al₂Ti + γ-TiAl and platemicrostructure with additional doping of refractory elements are of interest.

The review concerns the major application of materials based on cyanate ester resins in various branches of technology, indicating examples of implementation in modern devices. This article being the first part of the review highlights the cyanate esters implementation in the development of materials for aviation and space technology. The paper presents the most significant properties of polycyanurates in relation to their application. Information about the development of new cyanate ester resin-based composite materials for aircrafts and space shuttles is provided.

The rheological properties, processes of structure and phase formation of the Al₂O₃–ZrO₂ system compositions obtained by the sol-gel method have been investigated. The temperature range of crystallization of the compositions is 900–1100 °C. With an increase in the concentration of zirconium dioxide in the system, the temperature of the transition from the tetragonal to the monoclinic phase decreases. The effect of the ratio of the components in the initial solutions and the temperature regime of heat treatment of gels on the physicochemical properties of nanopowders and sintered materials has been studied. Ceramic materials of eutectic composition give the highest density and lower values ​​of porosity and water absorption.

In this work the effect of five cycles of heating to a temperature of 1000 °C and three cycles of heating to a temperature of 1100 °C on the structure of multilayered composite material consisted of 100 alternating layers of 08H18 and U8 steels was investigated via the methods of microstructural analysis. It is shown that already in the initial state after rolling there was a redistribution of carbon between the layers of the material. Thermal cycling led to a partial redistribution of chromium in the material, a change in the structure and thickness of the layers.

Curing parameters have the greatest impact on the physical and mechanical properties of FRP, therefore their optimum value is of particular importance for obtaining quality products. During curing temperature of the inner layers of the FRP can increase unevenly, which can lead to the formation of a gradient in the degree of conversion and heterogeneity of physical and mechanical properties. The article is devoted to the development of a mathematical model of the curing process of the EDT-69N resin, taking into account the kinetic parameters of curing and implementation thermophysical modeling using the finite element method.The correspondence of the family of curves for the degree of conversion along the sample cross-section and the family of microhardness curves is also shown.

The article discusses devices for fixing sheet metal blanks from PCM: a perforated vacuum table, its design features, advantages and disadvantages. Based on these data, the upper part of the vacuum table was made for cutting samples for Iosipescu tests and dielectric tests. The article describes various types of tools for PCM processing and an experiment on the wear resistance of a diamond-like coated rasp cutter when milling carbon fiber reinforced plastic, carried out by foreign researchers.

A number of domestic and foreign publications devoted to research on the possibility of using laser surface treatment technologies for cleaning from dirt, removing paint coatings and preparing the metal surface for subsequent technological operations are considered. The most striking examples of the use of technologies in the foreign aviation industry are given and the high readiness of their implementation in practice is noted. Theoretical information about laser technology is presented and the most progressive directions are highlighted.

The determination of the elements Cu, Ni, Sb, Bi, Pb, Zn and Fe in the tin-based solder VPr35, as well as the elements Sn, Ni, Sb, Bi and In in the lead-based VPr40 solder by the method of х-ray fluorescence spectroscopy has been carried out. The calibration dependences are corrected taking into account the superposition of signals from interfering elements on the analytical signal and changes in intensity caused by inter-element influences in the matrix. The analysis was carried out by the method of fundamental parameters without using standard samples. The correctness of the results obtained was confirmed by their comparative analysis by atomic emission spectroscopy and high-resolution mass spectrometry with a glow discharge.

Studies have been carried out to assess the effectiveness of fire retardants on the flammability of an epoxy composition – graphene and an organophosphorus compound DOPO-THPO. The concentrations of the added flame retardants were 2 and 4 % (mass). Flammability characteristics were determined using the method according to GOST 28157 (UL 94) with vertical and horizontal samples. It was found that the introduction of fire retardants reduces the flammability of the epoxy composition, but the introduction of even 4 % was insufficient to ensure self-extinguishing of the epoxy composition during vertical testing.

A laboratory study for biodegradation of polymer film materials (high-density and low-density polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride) under the action of mircomycete strains isolated under conditions of the island of Cuba was carried out. The maximum growth of micromycetes was observed in case of PVC samples. The minimum level of biodegradation for PVC films revealed at the mould resistance test (28 days) was confirmed by the results of tensile testing.