Кафедра Гідравліка, водопостачання та фізика (З 2022 року кафедра створена шляхом злиття кафедри Гідравлика та водопостачання та кафедри Фізика)
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UK; Кафедра Гідравліка, водопостачання та фізика
EN: Department Hydraulics, water supply and physics
EN: Department Hydraulics, water supply and physics
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Browsing Кафедра Гідравліка, водопостачання та фізика (З 2022 року кафедра створена шляхом злиття кафедри Гідравлика та водопостачання та кафедри Фізика) by Author "Gulivets, Alexey"
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Item Simulation of the Formation of Protective Coatings using the Radial Distribution Function of Atoms(Dnipro State Technical University, Kamianske, Ukraine, 2023) Sereda, Borys; Baskevich, Oleksandr; Gulivets, Alexey; Udod, AndreyENG: Studies of the structural factors of alloys, carried out using wide-angle and small-angle X-ray studies, allowed us to identify general patterns for various alloys. The use of apodization of the Fourier distribution of X-ray diffraction (XRD) contributes to the leveling of the effect of the break in the experimental intensity curve and facilitates close-order modeling. It was established that the height of the main peak of the structural factor decreases, and the position slightly shifts towards larger angles when the arrangement of alloys increases. The second maxima of the structural factor have an asymmetric shape, which varies depending on the conditions for obtaining the alloys. As the amount of phosphorus in the alloys decreases, the relief and height of the peaks increase. It was found that the diversity of the close order of the alloys is related to the deposition conditions, in particular, to a large value of the overvoltage at the cathode and the penetration of phosphorus atoms into the structure of the alloys. The obtained modeling results allow us to establish the conditions for the formation of close order in alloys and expand our understanding of the structural features of materials.Item Simulation of the Structure of Chromium Carbide in the Research of Amorphous Alloys(Dnipro State Technical University, Kamianske, Ukraine, 2023) Kruglyak, Irina; Baskevich, Oleksandr; Gulivets, Alexey; Maksimenko, OlegENG: Work are considered theoretical aspects of modeling amorphous and nanocrystalline alloys of transition metals and metalloids. Modeling of the close order of amorphous Cr–C alloys obtained by the electrodeposition method was carried out, depending on the current density and temperature of the electrolyte. The dependence between the production conditions and the close order of amorphous alloys was established. A technique for deciphering the radial distribution function of atoms (RDF) based on the concept of the cluster structure of amorphous metals has been developed. Modeling of the close order of amorphous Cr–C alloys was carried out using the approximation of the peaks of FRPA atoms, which are characteristic of the amorphous Ni86P14 alloy. The structure of electrodeposited Cr–C precipitates at different values of current density and electrolyte temperatures was investigated. It was established that the structure of the material is amorphous, and the sizes of the oriented random regions (ORA) vary from 3.6 to 5 nm. The lattice parameters of the samples increase slightly, which is associated with a change in the amount of carbon. The volume of the sediment consists of ORA, the shape of which is close to cuboctahedra, and the volume fraction decreases with an increase in the temperature of the electrolyte.