Перегляд за Автор "Volchuk, V. M."

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Development of ZnSxSe1-x nanocrystals with improved physical and optical properties obtained by the combustion synthesis method
(Харківський національний автомобільно-дорожній університет, 2023) Plakhtii, Ye. G.; Hlushkova, D. B.; Volchuk, V. M.
All compounds of ZnSxSe1-x nanocrystals were created by combustion synthesis method. The obtained samples were discovered to have diameters of 55 ± 5 nm and to have a heterogeneous crystalline structure. The fraction of the cubic phase grew in the appropriate ratios as the x value increased, but the fraction of the hexagonal phase in nanocrystals declined from 65 ± 5% to 30 ± 5%. According to XRD data, Mn2+ impurity ions are not mixed in the immediate environment despite the creation of ZnSxSe1-x solid solutions. The Mn2+ ions were surrounded by sulfur ions at a value of 0.2 < х ≤ 1 and selenium ions were at a value of x ≤ 0.2.
Implementation gas-plasma coatings based on nickel
(Харківський національний автомобільно-дорожній університет, 2022) Hlushkova, D. B.; Bagrov, V. A.; Demchenko, S. V.; Volchuk, V. M.; Kalinin, O. V.; Kalinina, N. E.; Глушкова, Д. Б.; Багров, В. А.; Демченко, С. В.; Волчук, В. М.; Калінін, О. В.; Калініна, Н. Є.
The development of modern technology requires a constant increase in reliability and durability of products.Widely used in the practice of domestic and foreign engineering coatings from electrolytic chromium for several hundred hours are triggered, they are unsatisfactorily working on friction and wear at high temperatures. The subject of the study were powder materials based on nickel PG-SR3 and PG-SR4. The work is devoted to the study of the formation of gasplasma coatings on parts of the cylinder-piston group of internal combustion engines using selffluxing powders based on nickel, as well as the structure and properties change after coating sputtering, its reflow,subsequent hardening. The purpose of this work is to study powder materials applied to the working surfaces of piston rings by gas-thermal spraying. The object of the study are processes of formation of the structure and properties of coatings from powder materials. The presence in the deposited layer of a solid solution based on nickel, carbide phase,borides of chromium and nickel, chromium silicides is established. The greatest macro- and microhardness is possessed by fused layers containing the greatest number of strengthening phases. The conducted researches and industrial tests allowed to introduce the coating into production.
The corrosion resistance of heat-resistant alloys for parts of power equipment
(Харківський національний автомобільно-дорожній університет, 2022) Vahrusheva, V. S.; Hlushkova, D. B.; Volchuk, V. M.; Nosova, T. V.; Mamhur, S. I.; Tsokur, N. I.; Bagrov, V. A.; Demchenko, S. V.; Ryzhkov, Yu. V.; Scrypnikov, V. O.; Вахрушева, В. С.; Глушкова, Д. Б.; Волчук, В. М.; Носова, T. В.; Мамчур, С. І.; Цокур, Н. І.; Багров, В. А.; Демченко, С. В.; Рижков, Ю. В.; Скрипніков, В. О.
For the manufacture of parts and assemblies of the turbopump unit of details of power equipment, welded joints with corrosion resistant steels and heat-resistant alloys are used, requiring various modes heat treatment to achieve the required level of mechanical properties. In the manufacture of parts and assemblies of details of power equipment at the machine-building enterprises of Ukraine, it became necessary to replace semi-finished products. It is necessary to replace sheet products from high-alloy alloys ХН67МВТЮ and 06Х15Н6МВФБ with one alloy with a high complex of physical and mechanical characteristics. In the work, as a replacement for the applied heat-resistant alloys, Inconel 718 alloy welded to 316L steel. Samples of welded joints, processed according to the recommended mode, showed increased corrosion resistance.