The paper investigates the microstructure, phase composition and mechanical properties of high-carbon bearing steel of the С–Cr–Mo–W–V–Nb alloying system under various heat treatment regimes. It has been established that the application of multi-stage tempering (up to 5 cycles) and cold treatment allows for effective control of the steel’s phase composition, achieving a martensite content up to 90 %. With optimal heat treatment, the steel demonstrates tensile strength up to 2620 MPa, yield strength of 2160 MPa, relative elongation of 6 %, and reduction of area of 8 %.

The article presents comparative studies of the structure, phase composition, mechanical properties and long-term strength of casting structural alloys based on the Ni₃Al compound VKHA-1VR with a polycrystalline structure and VKHA-1V Mono in two crystallographic orientations [111] and [001]. It is shown that the intermetallic alloys calculated taking into account the balance of alloying have passed technological testing with a positive result in the manufacture of castings of nozzle blades of a high-pressure turbine. VKNA-1VR alloy nozzle blades were also used on a promising gas turbine engine with positive results.

The article provides an analysis of scientific and technical publications on the development of new magnesium alloys. It has been established that the most intensive research is conducted on alloys containing gadolinium as the main alloying component. It has been shown that alloys of the Mg–Gd–Y–Zn–Zr, Mg–Gd–Y–Zn (containing long-period stacking ordered phase) systems, as well as the systems: Mg–Gd–Y–Zr, Mg–Gd–Zr–Ag are very promising in the case of applying non-standard technologies and processing schemes to them: a complex technological chain, including various types of deformation and heat treatment; technology of rotary pressing; modern technology of wire-arc directed energy deposition, etc.

The review examines hot-melt pressure-sensitive adhesives (HMPSA) based on styrene-butadiene-styrene (SBS) thermoplastic elastomers. The influence of microphase separation and block copolymer composition on the rheological parameters-elastic and viscous moduli as well as on the adhesive properties, including tack, shear, and peel strength, is analyzed. Modern HMPSA application methods and their use in aerospace, mechanical engineering, electronics, and related industrial fields are presented.

The article discusses the possibilities of using the DLP method to produce ceramic products from alumina ceramic. A stable highly filled photo-curable ceramic slurry based on aluminum oxide has been developed, which makes it possible to obtain complex ceramic products made of alumina by the DLP method with properties at the level of the best structural analogues obtained by traditional methods: density 3,5–3,8 g/cm³, bending strength 142–223 MPa, stress intensity coefficient pressure is 5,9 MPa √ m , as well as products made of porous ceramics.

Studies of changes in the diffusion characteristics of glass and carbon fiber reinforced polymers in their initial state and after exposure for 6 years in 5 climatic zones of the Russian Federation have been conducted. The value of the coefficient of determination of the approximation by the Fick and Langmuir models for the weighing results obtained at the stages of drying and humidification is equal to 1.00. Using the non-destructive plate twist method during conditioning, diagrams of shear modulus change were obtained and then approximated using the similar models. The modeling results allowed to distinguish the influence of climatic zones on the properties of the materials.

The results of a study examining the effect of substrate electrical potential in the range from 0 to 150 V on the structure and composition of NiCrAl coatings alloyed with refractory metals (Ta, Hf, and Re) are presented. It is shown that the deposition rate of all three selected coating alloys decreases linearly with increasing substrate electrical potential, reaching zero at approximately 200 V. This is due to the presence of high-energy, multiply charged metal ions in the vacuum arc discharge plasma. The elemental composition of the condensate also changes with increasing substrate electrical potential.

 Indium tin oxide (ITO) thin films are widely spread due to their high visible transparency and relatively low resistivity. Deposition at room temperature with thorough parameters optimization is required to obtain such coatings on flexible polymer substrates. Current research presents the results of ITO thin films obtaining on polyethylene terephthalate and glass substrates by magnetron sputtering. The influence of oxygen flow on coating’s resistivity, spectral optical characteristics and hydrophobic properties are investigated.

The article presents a review of scientific and technical literature in the field of crystalline coatings of silicon carbide of various polytype modifications and methods for their production. The paper examines promising areas of application for the most common crystalline polytypic modifications of silicon carbide, which include dark matter detectors and biosensors, in addition to power devices and microelectronics. Approaches to studying the preferential formation of one or another polytype of silicon carbide in crystalline coatings are described.

The work studies sintered materials for aviation navigation devices based on praseodymium with an impurity of neodymium. It has been established that at a high content of cobalt, which is necessary to increase the temperature stability, the impurity of neodymium is acceptable only in minimal quantities. In neodymium-based materials, the content of the main magnetic phase R₂(Fe, Co)₁₄B decreases sharply with an increase in the content of cobalt. It had been established that a material with a minimum content of cerium has optimal magnetic properties.

The article provides a comprehensive analysis of the problem and historical aspects of marine environmental pollution by plastic microparticles from paint coatings. The sources of intake and the chemical composition of microparticles paintwork are described in detail, including heavy metals, persistent organic pollutants and endocrine disruptors. The main ways of microparticle emission at all stages of the coating life cycle are analyzed: production, application, operation and disposal. Special attention is paid to the mechanisms of accumulation of microparticles in coastal ecosystems and their effects on marine organisms through trophic chains.

When evaluating the mechanical characteristics of stamping titanium alloy VT46 of the Ti–Al–Sn–Zr–β-stabilizers system, researchers encountered anomalous fracture of a titanium sample during a standard tensile test. The anomaly of the destruction is that it occurred by a brittle mechanism in the area of the forming neck during general plastic deformation. An assessment of the stress intensity factor at the site of brittle fracture revealed that crack-like defect size is insufficient for the brittle mechanism of crack development under the action of accumulated energy in the loading system. The authors of the study put forward the hypothesis about the formation of an enlarged brittle region (static growth of a crack-like defect) during plastic deformation, which leads to fracture by a macrobrittle tearing mechanism.

The work examines the requirements for conducting bending tests of aircraft floor sandwich honeycomb panel samples and the most common errors in the interpretation of test methods. An analysis of the requirements of aircraft developers for property indicators during bending tests is conducted, along with data from manufacturers of aircraft floor panels. Due to the lack of standards establishing requirements specifically for the bending tests of floor panels, the work provides justifications for applying methodologies that differ from GOST standards, which set requirements for testing sandwich structures.

The growing use of boron nitride powder for the manufacture of coatings has led to the need for its quantitative determination in the composition of industrial materials – in composite powders for the production of run-in coatings for gas turbine engines. In this paper, a method is proposed for the determination of boron nitride in composite coatings by inductively coupled plasma atomic emission spectrometry with two pre-sample preparation options: fusion with sodium hydroxide and autoclave decomposition in acids.

The study investigates the features of the synthesized orthorhombic vanadium oxide obtained through a multistage procedure from technical raw materials. It was established that the resulting vanadium oxide is characterized by strong particle aggregation with diverse morphologies, which is related to synthesis parameters. Particularly the high pH value during the precursor precipitation stage. Electrochemical studies revealed two pairs of redox transition: V (V) → V (IV) and V (IV) → V (III), and also allowed the determination of the working pH stability range (pH = 5–9).

The taxonomic identification of mycelial fungal strains from the collection of the NRC «Kurchatov Institute» – VIAM was carried out using the methods of genome-wide taxonomy. The taxonomic classification was carried out at the Kurchatov Genomic Center using two approaches: genomic signature analysis and a full-fledged phylogenetic analysis of 255 marker single-copy eukaryotic genes. The article presents data on the molecular identification of strains of the following taxa: genus Penicillium; order Xylariales, genera Nigrospora, Neopestalotiopsis, Pestalotiopsis, Daldinia; genus Cladosporium; genus Sarocladium; order Hypocreales; order Mucorales, genus Rhizopus; genus Trichoderma; genus Fusarium, etc.

The article considers the effect of the temperature transition of a polymer composite material saturated with moisture through a zero value. The study examines the effect of freezing moisture in the pores of a polymer composite. It is shown that in pores larger than 8 nm, ice forms gradually, with intense nucleation at the «air‒water» interface. This leads to the trapping of water in a confined volume. Upon subsequent cooling to –22°C and below, the pressure pore rises, reaching up to 209,9 MPa due to the water-ice phase transition in a constant volume.