Факультет електроніки та інформаційних технологій (ЕлІТ)
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Item Studying of nanocomposite films’ structure and properties obtained by magnetron sputtering(IOP Publishing, 2016) Tleukenov, Y.O.; Plotnikov, S.V.; Erdybaeva, N.K.; Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr DmytrovychVarious approaches to creating multicomponent na-nocomposite coatings of high and superhigh hardness (from 30 to 100 ± 120 GPa) are reviewed with particular emphasis placed on mechanisms underlying the increase in hardness in thin coatings. Nanocomposite Nb-Al-N films fabricated by magnetron sputtering were researched in this work. Two stable crystalline structural states were found in the films: NbNch and solid solution В1-NbxAl1-xNyO1-y, and also an amorphous component associated with aluminum oxynitride with reactive magnetron sputtering. A relationship of substructural characteristics sensitivity with the current and nanohardness and Knoop hardness characteristic was determined in this paper. Recent changes in the range of 29-33.5 GPa and 46-48 GPa, respectively. Initial principle calculations of NbN and Nb2AlN phases and NbN/AlN heterostructures were carried out for the interpretation of the results. Deposited nanocomposite films with the given mechanical properties may be used as wear resistant or protective coatings. On the basis of these results, it can be assumed that two stable crystalline structural states were found in the films: В1-NbNx and solid solution with a composition close to the В1-Nb0.67Al0.33N. The films also contain an amorphous component associated with aluminum nitride.Item Structural features and physico-mechanical properties of AlN-TiB2-TiSi2 amorphous-like coatings(Allerton Press, Inc, 2015) Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr Dmytrovych; Demianenko, A. A.; Pshik, A. V.; Kravchenko, Yu. A.; Sobol, O. V.; Beresnev, V. M.; Amekura, H.; Kono, K.; Oyoshi, K.; Takeda, Y.; Podchernyaeva, I. A.The coating of the AlN–TiB2–TiSi2 system has been produced by the magnetron sputtering of a target. At the hightemperature (900 and 1300°C) actions the coating crystallization to form crystallites of sizes 11–25 nm has been observed. It has been defined that the amorphouslike structure is promising for the use of these coatings as diffusion barriers both as the independent elements and a contacting layer in multilayer wearresistant coatings. It has been shown that the use of the resultant composite as an effec tive protective coating for cutting tools will make it possible to increase the tools wear resistance by more than 30% at the temperature up to 1300°C in the cutting zone.Item Structure and properties of nanocomposite Nb-Al-N films(Pleiades Publishing, Ltd., 2015) Ivashchenko, V.I.; Sobol, O.V.; Skrynskii, P.L.; Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr Dmytrovych; Rogoz, V.N.; Meilekhov, A.A.; Dub, S.N.; Kupchishin, A.I.Nanocomposite Nb–Al–N films prepared by magnetron sputtering have been studied. It has been found that, in the films, there are two stable crystalline structural states, namely, NbNz and B1–Nb1 ⎯ xAlxNyO1 – y, and an amorphouslike component related to aluminum oxynitride upon reactive magnetron sputtering. It has been established that the substructure characteristics are sensitive to the current supplied to an Al target and are related to the Knoop nanohardness and hardness, which change in the ranges of 29–33.5 and 46–48 GPa, respectively. Ab initio calculations for the NbNz and Nb2AlN phases and NbN/AlN heterostructures have been performed to interpret the obtained results for the first time. DItem The effect of Al target current on the structure and properties of (Nb2Al)N films with an amorphous AlN phase(Pleiades Publishing, Ltd, 2015) Ivashchenko, V.I.; Sobol, O.V.; Rogoz, V.N.; Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr Dmytrovych; Meilekhov, A.A.; Dub, S.N.; Kupchishin, A.I.Nanocomposite films based on (Nb2Al)N intermetallic nitride have been obtained by the method of magnetron sputtering. Xray diffraction analysis revealed two stable states of the crystalline structure: (i) NbN with low amount (within 5 at %) of dissolved Al in a composition close to (Nb2Al)N and (ii) an amor phous component related to aluminum nitride formed by reactive magnetron sputtering. The substructural characteristics (grain size and microdeformation level) are sensitive to the current via Al target and exhibit correlation with nanohardness and Knoop hardness of the film, which vary within 29–33.5 and 46–48 GPa, respectively.Item Дослідження впливу на мікроструктуру нанокомпозитного AlN-TiB[2]-TiSi[2] високотемпературного відпалу та імплантації(Сумський державний університет, 2015) Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr Dmytrovych; Смирнова, К.В.Розвиток сучасної промисловості та аерокосмічної галузі потребує створення нових та удосконалення вже існуючих матеріалів, що дозволяють реалізовувати процеси різання та обробки при високих температурах, швидкостях та великих питомих навантаженнях. Ці задачі можна вирішити методом утворення поверхневих структур з детермінованими властивостями.Item High Temperature Annealing of Ion-Plasma Nanostructured Coatings Based on AlN-TiB2(TiSi2)(Polish Academy of Sciences Institute of Physics, 2014) Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr Dmytrovych; Бондар, Олександр В`ячеславович; Бондарь, Александр Вячеславович; Bondar, Oleksandr Viacheslavovych; Beresnev, V.M.; Abadias, G.; Sobol, O.V.; Pshyk, A.V.; Kolesnikov, D.A.; Belovol, K.O.; Demianenko, A.A.; Komsta, H.The coatings investigated in this paper were deposited via the magnetron sputtering of AlN-TiB2(TiSi2) target in Ar atmosphere. The investigation of structural-phase composition, element composition, morphology and mechanical properties before and after annealing up to 1350 C was carried out. The concentration of elements in the coating was changed after annealing at 900 C and further annealing at 1350 C (especially after annealing at 1350 C). The hardness of as-deposited coatings was 15 GPa, but after annealing at 1350 C the value of hardness increased up to 22 - 23,5 GPa. The value of the viscoplastic index was 0.07. All this provide high damping properties of the coating, and amorphous-like structure makes promising the use of these coatings as diffusion barriers in the form of independent elements, and as a contacting layer in multilayer wear resistant coatings.Item Protection of specimens against friction and wear using titanium-based multicomponent nanocomposite coatings: A review(Springer, 2014) Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr Dmytrovych; Beresnev, V.M.; Pshyk, A.V.; Zhollybekov, B.R.A review of the experimental results of studying multicomponent nanocomposite protective coatings of various chemical compositions (TiAlCrYN, TiAlSiBN, TiAlSiCuN, CrTiAlSiN, and TiHfSiN/NbN/Al2O3) developed in recent years is presented. An analysis of the available data on the chemical composition, hardness, oxidation resistance, thermal stability, friction, wear, adhesion strength, and corrosion properties of nanocomposite coatings with high physicomechanical characteristics is carried out. The application of the nanocomposite coatings in industry is exemplified using the performance characteristics of drills made from a high speed steel covered with a multicomponent protective coating.Item Ионно-плазменное покрытие системы AlN-TiB2-TiSi2, получение и свойства(Национальный научный центр "Харьковский физико-технический институт", 2013) Азаренков, Н.А.; Береснев, В.М; Торяник, И.С.; Погребняк, Олександр Дмитрович; Погребняк, Александр Дмитриевич; Pohrebniak, Oleksandr Dmytrovych; Соболь, О.В.; Дробышевская, А.А.; Кропотов, А.Ю.; Толмачева, Г.Н.; Клименко, С.А.; Турбин, П.В.; Литовченко, С.В.; Колесников, Д.А.Методом магнетронного розпилення мішені, що складається з AlN-TiB2-TiSi2, отримані покриття зі значенням індексу в’язкопластичності 0,07 при твердості Н = 15,3 ГПа, що забезпечує високі демпфуючі властивості такого покриття, при цьому аморфноподібна структура представляє перспективним застосування таких покриттів в якості дифузійних бар’єрів як самостійних елементів,та і в якості контактуючого шару в багатошарових зносостійких покриттях. При цитуванні документа, використовуйте посилання http://essuir.sumdu.edu.ua/handle/123456789/33939