http://dspace.nbuv.gov.ua:80/handle/123456789/114734 2026-04-13T05:23:40Z http://dspace.nbuv.gov.ua:80/handle/123456789/120639 Influence of deposition rate and substrate temperature on structure and optical features of NiO thin film Oberemok, O.S.; Sabov, T.M.; Lisovskyy, I.P.; Khacevych, I.M.; Gudymenko, O.Yo.; Nikirin, V.A.; Voitovych, M.V. Nickel oxide thin films were prepared by direct-current magnetron sputtering method at different deposition rates on unheated and heated substrates. It was shown that the deposited films are the dense arrays of nanowhiskers with the rhombohedral crystalline structure for the unheated substrate and with the face centered cubic structure for the heated substrate. Surface morphology of films consists of nanocrystalline randomly oriented grains. Increasing of the deposition rate and/or the substrate temperature lead to decrease of the film porosity and enlarge of nanocrystals. The maximum oxidation state of the deposited films is observed near the surface. 2016-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/120638 On features of deoxidization of CsI melt with zirconium getter Datsko, Yu.N.; Rebrova, T.P.; Cherginets, V.L.; Naumenko, V.A.; Rebrov, A.L.; Mateychenko, P.V.; Vjunnik, I.N. Interaction of Zr getter with oxygen-containing admixtures being most abundant in molten alkali metal iodides (deoxidization) is studied. Reaction of Zr with oxide ions (in form of the corresponding alkali metal oxide) is characterized by very negative enthalpy and Gibbs energy values that make the deoxidization process very favorable. Practically the interaction leads to decrease of O²⁻ concentration by a factor of ca. 6. Interaction of Zr with carbonate ions is shown both by the calculations and by experiment Ґй lead to the formation of carbon particles (suspension) in the melts that causes certain limitations of the getter treatment for the purification of practically used growth iodide melts. 2016-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/120637 Analysis of dynamic parameters of the KY-crystallization process Kryvonosov, Ie.V.; Lytvynov, L.A. The Kyropoulos method is an efficient means for the growth of large high-quality sapphire. The main drawback of this method is the absence of information about the growth rate and geometrical size of the growing crystal during the technological process. Described in the present work is a method for analyzing the dynamic characteristics of the real crystallization process. The method is based on the readings of the growing crystal weight sensor, and on a virtual image of the technological process, assumed that the crystallization interface has a conical shape characterized by a varying angle at the cone vertex. 2016-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/120636 Computer simulation of the compressive failure of porous material through Distinct Lattice Spring Model You Shuang; Zhao Gaofeng; Ji Hongguang This paper presents the computer simulation of dynamic failure process of porous material through a discrete numerical method. The motivation of this study is to investigate the influence of porous on the compressive failure of material by using the Distinct Lattice Spring Model (DLSM). Firstly, the basic theory of the DLSM is introduced. Due to its inherit discrete nature, DLSM is more suitable to simulate the fracturing process problems than conventional continuum based methods. Then, the methodology used to represent the porous materials is presented. Following this, details of DLSM modeling on the failure process of the porous material under dynamic loading are provided. Finally, the influence of loading ratio and porous on the final strength of the material are presented and analyzed. It indicates that porous play a significant influence on the dynamic compressive strength of material. 2016-01-01T00:00:00Z