The structure, phase composition and hardness of corrosion-resistant steels with different mechanisms of volumetric hardening was studied. It was found that after hardening treatment of steel VNS9-Sh, VNS30-Sh, VNS72-Sh have approximately the same hardness with a volumetric martensite content of 50, 90 and 75 %, respectively. According to the results of tribological tests for wear under dry friction conditions, it was found that VNS9-Sh steel with the TRIP effect has the best wear resistance. VNS30-Sh steel with precipitation hardening and VNS72-Sh steel with martensite hardening have approximately the same wear resistance.

This article opens a series of publications in which the main problems of magnesium alloys will be considered, such as low corrosion resistance, high anisotropy of mechanical properties, low fire safety, as well as the industries of application of these materials. The cycle of works involves several parts, each of which is devoted to a separate macro-problem characteristic of magnesium alloys, or to industries in which magnesium alloys may be most in demand. This part of the review presents basic information and systems for alloying magnesium alloys. The crystallographic and structural factors influencing the corrosion resistance of magnesium alloys are described. The possibility of using magnesium alloys in medicine is shown, and the reasons for which at the current moment of time their use is difficult.

The article presents the results of a study of the operational properties of the VTP-1V grade material, including cold flow. It was found that the material of the VTP-1V grade hasn’t cold flow and, according to the complex of properties studied in the work, can be recommended as an alternative to layered polymeric composite materials used in the bolted joints of the aircraft wing rib. The possibility of operating VTP-1V in an environment of aggressive liquids was assessed and it was shown that the material is resistant to the effects of TC-1 fuel, including retaining low deformability under prolonged loading.

The paper presents the results of a study of the effect of non-covalent modifiers on the structure and properties of polymer filaments for FDM-printing based on ABS-plastic and carbon nanoparticles. The dependences of the characteristics of nanocomposites and filaments based on them to the type of functionalization have been established. The effect of the concentration of CNTs on the hardness, water absorption, electrical resistance, and shear strength for modified polymer filament has been investigated. The optimal formulations and technological parameters of FDM-printing of templates have been determined. 

In this work, we studied the radio technical characteristics of two-matrix composites made by combining thermoplastic, modified carbon nanotubes (CNTs), templates with a network and figured structure, and polymer compositions based on epoxy resin containing iron powders and CNTs. It has been established that the implemented approach makes it possible to flexibly regulate the radio-technical properties of a two-matrix composite material by varying the structure and size of the cells of the thermoplastic template and the type of filler for the polymer composition based on epoxy resin. 

Currently, compositions based on a mixture of phenol-formaldehyde resins of the resole and novolac types are of considerable interest. In the first part of the review examples of the use of resole-novolac phenol-formaldehyde resins in adhesive compositions, prepregs, fiberglass plastics and refractory masses are given. The advantages of using resole-novolac compositions in comparison with resole and novolac phenol-formaldehyde oligomers by increasing the physical and mechanical characteristics, fire resistance and fireproof properties are shown. 

The effect of the modifying additive ZrO₂ on the rheological properties, the processes of structure and phase formation of the compositions of the Y₂O₃–Al₂O₃–SiO₂ system obtained by the sol-gel method has been investigated. It was found that the temperature range of crystallization of the compositions of the Y₂O₃–Al₂O₃–SiO₂ system with the addition of ZrO₂ is 1020–1270 °C and with an increase in the concentration of zirconium oxide, the amount of the main crystalline phase of yttrium pyrosilicate (β-Y₂Si₂O₇) decreases and the concentration of the zirconium-containing phase – the tetragonal modification of zirconium oxide and zirconium silicate ZrSiO₄ -increases. 

Based on the analysis of recent publications of scientific and technical literature, data on the production of zirconium oxide fibers used for the manufacture of high-temperature thermal insulation materials are presented. Information is provided on various methods of obtaining zirconium oxide fibers (methods of impregnation of the template and molding of the mixture, sol-gel method of spinning a fiber-forming precursor solution), as well as on the technique of fiber molding (manual pulling, dry and wet spinning, blowing and electrospinning). The use of such fibers for the production of thermal insulation materials (felts, cords and blocks) instead of currently existing materials made of aluminum oxide-based fibers can significantly increase the operating temperatures of the thermal protection systems.

The phase structure, adhesion and physical mechanical properties, water resistance of varnish coatings on the basis of the modified and not modified epoxy filmformers, with organic silicon ammine «AСOT-2» and low-molecular «ПO-200» polyamide as curing agents. It is established that the process of structurization of unfilled epoxy compositions depends on each component of polymeric system. The received results of determination of adhesion, physical mechanical properties, water resistance correlate with results of researches of phase structure of the coatings received on the basis of modified and not modified epoxy compositions, with organic silicon ammine «AСOT-2» and low-molecular «ПO-200» polyamide as curing agents.

The article presents the results of work on improving the corrosion resistance of magnets of the REM–Fe–B system manufactured in China, by applying an ion-plasma coating of the SDP-1T + VSDP-13 system on an industrial vacuum-arc installation MAP-3. A comparative assessment of the tread protection of the vacuum-arc coating of the SP-1T + VSP-13 system was carried out with an already applied Ni–Cu–Ni coating under conditions of accelerated cyclic corrosion tests at a temperature of 300 °C. The coating of the SDP-1T + VSDP-13 system, applied in the FSUE «VIAM», creates a much more resistant protection of the magnets of the REM–Fe–B system from corrosion compared to the electroplating of the Ni–Cu–Ni system, manufactured in China.

A method is proposed for the determination of titanium and zirconium by inductively coupled plasma atomic emission spectrometry in aluminum alloys. Analytical lines of titanium and zirconium free from other elements significant spectral overlaps are selected. The selection of the sample preparation method was carried out, namely – dissolution in concentrated nitric acid. Studies of the metrological characteristics of the technique were carried out: for titanium and zirconium contents from 0.05 to 0.3 % of the mass. the accuracy index is no more than 5 % rel., which fully ensures the possibility of analytical control of the content of titanium and zirconium in products from aluminum alloys.

The analysis of the requirements of domestic and foreign standards for the magnetic particle testing (MPT) method is presented. Their advantages and disadvantages are highlighted, as well as fundamental differences in the technology of control, of which the main one is the use of the remanent magnetization method in the practice of domestic MPT. The methods of remanent magnetization and the applied magnetic field are compared. Based on the analysis, it was concluded that for the control of particularly responsible products during the MPT, GOST 56512-2015 should be followed.