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Документ Structure and phase formation features of Ti-Zr-Ni quasicrystalline films under heating(Sumy State University, 2019) Malykhin, S. V.; Kondratenko, V. V.; Kopylets, I. A. ; Surovitskiy, S. V.; Baturin, A. A.; Mikhailov, I. F.; Reshetnyak, M. V.; Borisova, S. S.; Bogdanov, Yu. S.The paper describes the growth features of thin Ti-Zr-Ni films prepared by the method of magnetron sputtering of the targets with compositions Ti₅₃Zr₃₀Ni₁₈ and Ti₄₁Zr₃₈.₃Ni₂₀.₇ on the substrates at 300 K with subsequent annealing in vacuum. The formation peculiarities of phase composition, structure and thermal stability of quasicrystalline thin films were studied. It was established that in initial state the films were X-ray-amorphous or nanocrystalline with coherence lengths (according to Scherrer) near 1.6-1.8 nm independently on the element composition of the sputtered target. This structure is relatively stable up to the temperature 673 K when the formation of the quasi-crystalline phase begins. In the films with composition of Ti₅₃Zr₃₀Ni₁₈. It is added with an admixture of the 1/1 W-crystal approximant phase. In the films with Ti₄₁Zr₃₈.₃Ni₂₀.₇ composition, an optimal annealing temperature is between 823 K and 873 K. Additionally, for the first time, the data on the formation of 2/1 approximant crystal as an admixture phase in this system were obtained. Under annealing at the temperatures higher than 873 K, the decomposition of the quasi-crystalline and approximant phases into crystalline phases stable at higher temperatures according to the equilibrium phase diagram was established.Документ Structural-phase changes in thin films and surface layers of Ti₄₁.₅Zr₄₁.₅Ni₁₇ alloy, stimulated by radiation-thermal impact of hydrogen plasma(Kharkiv Institute of Physics and Technology, 2019) Malykhin, S. V.; Makhlai, V. A.; Surovitskiy, S. V.; Borisova, S. S.; Herashchenko, S. S.; Kondratenko, V. V.; Kopylets, I. A.; Baturin, A. A.; Terentyev, D.X-ray diffraction and SEM microscopy were used to study structural and phase changes in the surface layers of a Ti₄₁.₅Zr₄₁.₅Ni₁₇ alloy bulk sample (target) and a thin film (deposited by magnetron sputtering of the target) under radiation-thermal action of pulsed hydrogen plasma with a thermal load of 0.6 MJ/m² in QSPA Kh-50 installation. It is established that the irradiation results in the formation of a two-phase state: the icosahedral quasicrystalline phase together with the phase of the 1/1 approximant crystal (W-phase). As a result of isothermal (550°C) annealing, the content of the quasicrystalline phase increases.Документ Synthesis and characterisation of nanocrystalline ZrN PVD coatings on AISI 430 stainless steel(National Science Center "Kharkov Institute of Physics and Technology", 2019) Taran, A. V.; Garkusha, I. E.; Taran, V. S.; Muratov, R. M.; Skoblo, T. S.; Romaniuk, S. P.; Starikov, V. V.; Baturin, A. A.The nanocrystalline films of zirconium nitride have been synthesized using ion-plasma vacuum-arc deposition technique in combination with high-frequency discharge (RF) on AISI 430 stainless steel at 150oC. Structure examinations X-ray fluorescent analysis (XRF), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) with microanalysis (EDS), and transmission electron microscopy (TEM), nanoidentation method – were performed to study phase and chemical composition, surface morphology, microstructure and nanohardness of coatings. The developed technology provided low-temperature coatings synthesis, minimized discharge breakdown decreasing formation of macroparticles (MPs) and allowed to deposit ZrN coatings with hardness variation 26.6…31.5 GPa. It was revealed that ZrN single-phase coatings of cubic modification with finecrystalline grains of 20 nm in size were formed.Документ Anti-corrosion ceramic coatings on the surface of Nd-Fe-B repelling magnets(National Science Center "Kharkov Institute of Physics and Technology", 2019) Taran, A. V.; Garkusha, I. E.; Taran, V. S.; Timoshenko, O. I.; Misiruk, I. O.; Skoblo, T. S.; Romaniuk, S. P.; Starikov, V. V.; Baturin, A. A.; Nikolaychuk, G. P.; Pyvovar, N. V.; Gnidenko, Yu. P.The results of vacuum-arc deposition of thin ZrO₂coatings to protect the surface of Nd-Fe-B permanent magnets used as repelling devices in orthodontics are presented. The structure, phase composition and mechanical properties of zirconium dioxide films have been investigated by means of SEM, XRD, EDX, XRF and nanoindentation method. It was revealed the formation of polycrystalline ZrO₂ films of monoclinic modification with average grain size 25 nm. The influence of the ZrO₂ coating in terms of its barrier properties for corrosion in quasi-physiological 0.9 NaCl solution has been studied. Electrochemical measurements indicated good barrier properties of the coating on specimens in the physiological solution environment.Документ Structure of magnetron hydroxyapatite films with small stoichiometry deviation(STC "Institute for Single Crystals", 2016) Mikhailov, I. F.; Starikov, V. V.; Baturin, A. A.Phase composition, coherence lengths and micro-strain level in hydroxyapatite films with controlled deviation from stoichiometry (Ca/P = 1.67) were measured by methods of X-ray diffraction and X-ray fluorescent analysis. It was established that at Ca/P = 1.6±0.03, hydroxyapatite layers with thickness 2m on the niobium substrates were practically single-phase but differed by the coherence lengths and micro-strain levels for different crystallographic directions: the coherence length along was commensurable with the film thickness and much exceeded the values for and directions. The micro-strain level ε for direction reached (1.3÷1.7)·10-3 being by an order higher than for and directions. That testifies constrained growth conditions along with the high homogeneity of the lattice period of the hydroxyapatite film.Документ X-Ray Fluorescence Determination of Trace Gold in an Ion-Exchange Resin(Pleiades Publishing, Ltd., 2014) Mikhailov, I. F.; Baturin, A. A.; Mikhailov, A. I.; Fomina, L. P.The use of portable X ray optics with a secondary radiator in the determination of trace gold in an ion exchange resin within the mass fraction range of 1–50 ppm is described. It is shown that the secondary radiator design with primary radiation filtering allows one to determine trace gold in an ion exchange resin when the mass fraction of gold is lower than 1 ppm.Документ X-ray method for determination of mineral constituent in solid fuel(Scientific and Technological Corporation "Institute for Single Crystals", 2014) Mikhailov, I. F.; Baturin, A. A.; Mikhailov, A. I.Запропоновано рентгенівський метод визначення мінеральної складової твердого пального за співвідношенням інтенсивності піків комптонівського та релєївського розсіяння.Документ High-Stable Standard Samples of Mass in the Nano-Gram Range(Scientific and Technological Corporation "Institute for Single Crystals", 2013) Mikhailov, I. F.; Baturin, A. A.; Bugaev, Ye. A.; Mikhailov, A. I.; Borisova, S. S.Исследованы высокостабильные эталоны масс, полученные методом магнетронного осаждения сверхгладких слоев металлов на монокристаллические подложки. Тонкопленочные эталоны отвечают требованиям, предъявляемым ГОСТ 8.315-97 к государственным стандартным образцам: однородны, стабильны во времени и допускают аттестацию несколькими независимыми методами. Обеспечена точность измерений массы в диапазоне от 1 до 17 нг не хуже 1 нг, а в диапазоне от 17 до 3800 нг не хуже 8 нг.Документ Increasing the sensitivity of X-ray fluorescent scheme with secondary radiator using the initial spectrum filtration(Scientific and Technological Corporation "Institute for Single Crystals", 2012) Mikhailov, I. F.; Baturin, A. A.; Mikhailov, A. I.; Borisova, S. S.Проведена оптимизация толщины первичного фильтра в схеме флуоресцентного переизлучателя по критерию наименьшего предела обнаружения Сmin. Экспериментально установлено, что фильтрация обеспечивает трех-четырех кратное повышение контрастности и 70 %-й выигрыш в пределе обнаружения по критерию Сmin. Для следовых примесей золота в ионообменных смолах достигнутая чувствительность анализа на уровне 1 ppm не уступает реализуемой в сложной схеме Баркла с поляризованным излучением.Документ Contrast Enhancement of X-Ray Fluorescence Spectra Using a Secondary Two-Layer Radiator(Scientific and Technological Corporation "Institute for Single Crystals", 2011) Mikhailov, I. F.; Baturin, A. A.; Mikhailov, A. I.; Borisova, S. S.Теоретически рассчитаны и экспериментально измерены распределение фона рассеянного излучения и контрастность аналитических линий образца при возбуждении флуоресценции с помощью двухслойного вторичного излучателя. Верхний слой служит для возбуждения линий легких элементов и является адсорбером сплошного спектра, рассеянного нижним слоем. Получено выражение для расчета оптимальной толщины верхнего слоя, при которой достигается максимальная контрастность спектров. При оптимальной толщине покрытия экспериментально удается получить 34 кратное повышение контрастности в диапазоне длин волн 0,7 10A по сравнению с однородным излучателем.