Change in nitrogen concentration, formation of the structure and properties of the metal-powder composition and 3D-printed samples of high-nitrogen corrosion-resistant bearing steel was studied. It is established that providing a super-equilibrium nitrogen concentration in the chemical composition of steel is possible both at the stage of obtaining an ingot and during the production of a metal-powder composition and 3D-printing of samples. The formed segregations of carbonitrides in the obtained samples contribute to a decrease in mechanical and tribotechnical characteristics.

The review analyzes the current state of production of HNA (Heat-resistant nickel alloy) granules by the method of plasma melting and centrifugal spraying of a cast rotating blank (PREP method). The main theoretical and practical features of the production of HNA granules by this method are shown. Based on the analysis of a number of works in a similar direction, the corresponding calculations are made, allowing to form a list of requirements for the production of granules using the method of plasma melting and centrifugal spraying of a cast rotating blank.

A comprehensive study of structural steel parts was conducted to establish the nature of their destruction and to determine the type of defects detected. Metallographic and fractographic analysis methods were used to study operating structure, opened cracks and the microstructure of steels. It was found that the destruction of a spring made of 30HGSN2A-VD steel was facilitated by the presence of coarse scratches and a decarburized layer on the inner surface. In parts made of 30HGSA steel, defects were detected at the stage of thermal and mechanical treatment.

The results of developing a technology for manufacturing of pressed and forged semi-finished products from a hard-to-deform aluminum alloy of the Al–Si–Ni system, grade SAS1 for rocket and space technology products are presented. Taking into account the capabilities of the equipment of the National Research Center «Kurchatov Institute» – VIAM, a technology has been developed for the production of pressed semi-finished products and forgings with a diameter of up to 50 mm. The manufactured pressed semi-finished products have the following level of physical and mechanical properties: d = 2,7 g/cm³, σ_в = 325–335 MPa, σ_0,2 = 210–230 MPa, δ₅ = 1,6–2,1 %, α ≤ 14,4·10^–6 К^–1

The study presents the results of research on the development of advanced high-tech aluminum alloy VAS1 for production of helicopter parts by selective laser melting (SLM). The effect of SLM process parameters on material quality, including microstructure, porosity and roughness has been investigated. Experimental data on the mechanical properties of the material in the as-built state and after strengthening heat treatment are presented. A prototype bracket-type part has been successfully fabricated meeting all geometric tolerances and being free from critical defects.

The paper presents a review of scientific and technical information on LaRC-series polyimide materials. The most significant physical and thermomechanical properties of heat-resistant polyimide polymer matrices are outlined, including thermal stability, mechanical strength, and resistance to aggressive environments. The main advantages of these polyimides are highlighted. The chemical compositions of LaRC-series polyimide materials and their structural formulas are described. Promising application areas for polyimide materials in the aerospace industry are discussed.

The study describes impact assessment of elevated storage temperature on reaction capacity of prepreg carbon fiber reinforced plastic (CFRP) and properties of the polymeric composite material on its basis. Prepreg VKU-39/VTkU-2.200 on the basis of molten epoxy binder VSE-1212 has been chosen as the object of the study. Technological characteristics of prepregs have been studied by methods of differential scanning calorimetry. Properties CFRP based on prepreg VKU-39/VTkU-2.200 in initial condition and after storage in conditions of elevated temperature within 5–20 days are investigated.

The article considers the main directions of application of catalysts for oil refining processes, including those for the import substitution. Some properties of a high-porous material based on oxide fiber are demonstrated, revealing the prospect of using this class of material as catalyst carrier. The water front movement in a fibrous high-porous material has been studied by the magnetic resonance imaging (MRI process). It has been shown that thermal activation of the fiber surface increases the sorption capacity of the material.

The article presents the study results of the effect, which laboratory-simulated exposure to elevated temperatures from 280 to 350 °C has on the structure and properties of high-temperature carbon fiber plastics based on polyimide binders and carbon fillers from bundles from various manufacturers. The strength characteristics, i.e. bending and interlayer shear, density, glass transition temperature and mass loss of carbon plastics after exposure to elevated temperatures has been determined. Microstructural studies of the carbon fiber surface have been carried out and the microphase composition of the binder has been determined.

The article considers fluorine-containing polymer film-forming agents used in protective coatings and other industrial sectors. The paper provides the results of an analysis of the fluoropolymer market in Russia and abroad, as well as an assessment of the development of these polymers in our country. The features of the chemical structure of fluorine-containing copolymers and their modifications are described. The main advantages of fluorinated film-forming agents and the areas of their application are identified.

A three-layer structure with a honeycomb core (sandwich structure) is presented as a composite material consisting of two coverings as a reinforcing filler, a honeycomb core (matrix) and an adhesive layer as an interphase layer. A detailed review of the methods for testing of samples from three-layer structures with a honeycomb core is given. The following tests are considered: bending, compression, tension, shear, peeling of the covering on a drum, the ability to absorb the energy of external force action, static and impact loading. The main types of destruction of sandwich structures during these tests are reflected. The characteristics of the material determined during these tests are considered. Recommendations for the design of three-layer structures are given.

The salt deposition rate on the surface of different fibre-reinforced plastics and standard samples of «wet candles» and «dry plates» during the exposure in a seaside atmosphere in various distances from the sea has been studied. During one year of the exposure, the content of different ions on the surface of the samples was determined by the capillary electrophoresis method. The dependence of the salt content on the surface of various samples on the duration of winds, blowing from the sea, and surface roughness profile of materials, was established.