3. Секція "Матеріалознавство порошкових та композиційних матеріалів і покриттів"
Постійне посилання на фондhttps://archive.ipms.kyiv.ua/handle/123456789/23
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Документ EFFECT OF THE STRUCTURE OF TiB2–(Fe–Mo) PLASMA COATINGS ON MECHANICAL AND TRIBOTECHNICAL PROPERTIES(Powder Metallurgy and Metal Ceramics, 2017) M. S. Storozhenko; A. P. Umanskii; A. E. Terentiev; I. M. Zakiev2The structure, mechanical properties, and wear-resistance of TiB2–(Fe–Mo) plasma coatings are investigated. Composite powders in the TiB2–(Fe–Mo) system with 20, 40, 60, and 80 wt.% of the Fe–13 wt.% Mo alloy were produced by vacuum sintering with subsequent grinding. The developed powders are conglomerates that contain both refractory and metallic phases. During plasma spraying of developed coatings, a coating with heterophase structure, which consists of Fe-based metal alloy and titanium diboride grains, is formed. The effect of the microstructure of plasma-sprayed coatings on the wear-resistance under abrasive wear and dry sliding friction conditions is studied. The scratch hardness testing revealed an insufficient strength of TiB2–20 wt.% (Fe–13 wt.% Mo) coatings and their poor adhesion to the coating base, resulting in the extremely gross wear, when friction. It is found out that, due to the optimal ratio of refractory and metallic phases, the TiB2–40 wt.% (Fe–13 wt.% Mo) coating possesses high wear-resistance under abrasive wear and dry sliding friction conditions.Документ STRUCTURE, PHASE COMPOSITION, AND WEAR MECHANISMS OF PLASMA-SPRAYED NiCrSiB–20 wt.% TiB2 COATING(Powder Metallurgy and Metal Ceramics, 2015) A. P. Umanskii; M. S. Storozhenko; I. V. Hussainova; A. E. Terentiev; A. M. Kovalchenko; M. M. AntonovThe structure, phase composition, and wear mechanisms of plasma-sprayed NKhTB20 coating (NiCrSiB–20 wt.% TiB2) are studied. To produce NKhTB20 composite powder, commercial PR-NKh16SR3 (NiCrSiB) powder was mixed with 20 wt.% TiB2 and the charge was pressed and sintered in vacuum at 1100C for 30 min. During sintering, the components react to form chromium borides. The sinters were ground and classified into the particle size fraction –100+60 nm for plasma spraying. The plasma-sprayed NKhTB20 coating consists of a nickel-based matrix reinforced with titanium diboride and chromium boride grains. The friction and wear behavior of the NKhTB20 coating in dry friction against plasma-sprayed NiCrSiB and NKhTB20 coatings is examined. It is revealed that the NKhTB20/NiCrSiB friction pair has higher wear resistance than NKhTB20/NKhTB20. The contact surfaces of the NKhTB20/NKhTB20 friction pair are damaged under oxidative and abrasive wear mechanisms. Oxidative wear is the dominant mechanism for the NKhTB20/NiCrSiB friction surface. Complex oxide films form on the NKhTB20/NiCrSiB sliding surface and prevent it from damage.Документ Study of aluminum content on the structure and phase composition of synthesized aluminum-matrix composites(Scientific Technical Union of Mechanical Engineering “Industry-4.0”, 2023) Yevheniia Kyryliuk; Genadii Bagliuk; Stepan Kyryliuk; Bykov Oleksandr; Yulia ShishkinaThe work shows that there is no significant change in the phase composition of composites with a change in the synthesis temperature, so we can use pre-synthesized heats at a temperature of 950 oC to obtain hot-stamped aluminum-based composites. The best characteristics of the synthesized titanium carbide were obtained for the composition 45Al-11C-44Ti (%, wt.). The lattice period of titanium carbide for this sample is 0.4324, and the particle size of titanium carbide formed after sintering is 0.8-1.5 μm. The influence of the component composition of the initial charge on the features of the structure and the phase composition of the thermally synthesized heat of the Al-C-Ti system was established.Документ Вплив технологічних параметрів внутрішньоформового модифікування порошковими брикетованими модифікаторами на структуру та властивості виливків з високоміцного чавуну(G. V. Kurdyumov Institute for Metal Physics, National Academy of Sciences of Ukraine, 2023) Г. А. Баглюк; † В. Я. Куровський; О. Й. Шинський; М. Я. Терещенко; А. П. Тіщенко; H. A. Bagliuk; V. Ya. Kurovs’kyy; O. Y. Shyns’kyy; M. Ya. Tereshchenko,; A. P. TishchenkoВ роботі наведено результати дослідження впливу компонентного складу, маси та конфіґурації порошкових брикетованих модифікаторів на струк- туру та властивості високоміцного чавуну, одержаного методою внутріш- ньоформового модифікування. Модифікування розтопу забезпечували за рахунок встановлених на ливниках модифікувальних вставок — цилінд- ричних втулок двох конфіґурацій: з осьовим циліндричним отвором та отвором у вигляді конусної поверхні (діяфрагма), спресованих із двох ва- ріянтів сумішей порошків маґнію, феросиліцію, заліза та плавикового шпату (CaF2). Маса модифікувальних вставок варіювалася від 25 до 100 г. Результати досліджень показали, що використання модифікувальної вставки у вигляді діяфрагми забезпечує підвищення середнього вмісту Маґнію у виливку та міцности одержаного чавуну у порівнянні із гладкою втулкою для всіх значень маси вставки, а також підвищення рівномірно- сти розподілу Маґнію по довжині виливка для варіянтів вставок підви- щеної маси (75 та 100 г). Збільшення маси модифікувальної втулки при- водить до підвищення рівня міцности стопу. The results of the study of the impact of the component composition, mass and configuration of powder-briquetted modifiers on the structure and prop- erties of high-strength cast iron obtained by the method of intraform modifi- cation are presented. Modification of the melt is provided at the expense of modifying inserts—cylindrical bushings of two configurations—with an axi- al cylindrical opening and a hole in the form of a conical surface (diaphragm) pressed from two variants of mixtures of magnesium, FeSi, Fe and CaF2. The mass of modifying inserts varies from 25 to 100 g. The results of the studies show that the use of a modifying insert in the form of a diaphragm provides an increase in the average content of magnesium in casting and strength of the resulting cast iron compared to the smooth sleeve for all values of mass inserts, besides increasing of uniform distribution of magnesium along the length of the casting for variants of high-mass inserts (75 and 100 g). In- creasing the weight of the modifying sleeve leads to an increase in the level of alloy strength.Документ Study of aluminum content on the structure and phase composition of synthesized aluminum-matrix composites(Machines. Technologies. Materials. Vol. 17 (2023), Issue 1, pg(s) 46-49, 2023) Yevheniia Kyryliuk; Genadii Bagliuk; Stepan Kyryliuk,; Bykov Oleksandr; Yulia ShishkinaAbstract: The work shows that there is no significant change in the phase composition of composites with a change in the synthesis temperature, so we can use pre-synthesized heats at a temperature of 950 oC to obtain hot-stamped aluminum-based composites. The best characteristics of the synthesized titanium carbide were obtained for the composition 45Al-11C-44Ti (%, wt.). The lattice period of titanium carbide for this sample is 0.4324, and the particle size of titanium carbide formed after sintering is 0.8-1.5 μm. The influence of the component composition of the initial charge on the features of the structure and the phase composition of the thermally synthesized heat of the Al-C-Ti system was established.Документ Exploration of Titanium-Based Fine-Particle Additive Influence on Cohesive and Adhesive Strength Enhancement in Epoxy-Polymer Composites(PHYSICS AND CHEMISTRY OF SOLID STATE, 2024) O. Baranovska; G. Bagliuk; A. Buketov; O. Sapronov; D. BaranovskyiThe study examines how the inclusion of a dispersed powder filler affects the physico-mechanical properties of an ultrasound-modified epoxy matrix. Varying the filler content from 5 % to 60 % by weight in the composite revealed an optimal concentration for enhanced mechanical properties. Introducing the filler at 5 % led to maximum impact strength (W = 18.47 kJ/m2 ) and minimized destructive stresses during bending (σB = 51.75 MPa). At 10 % filler concentration, destructive bending stresses increased significantly from σB = 48.0 MPa to σB= 74.85 MPa, with impact strength improving from W = 7.4 kJ/m2 to W = 17.42...18.47 kJ/m2. Further increasing filler content to 20 - 60 % resulted in a slight decrease in destructive stresses while still surpassing for the filler-free epoxy matrix strength. Optimal modifier content improved adhesive characteristics, achieving a peak adhesive strength (σa = 33.4 MPa) at 20 % filler, albeit with residual stresses at 0.34 MPa. Introducing the modifier at 10% increased adhesive strength to σa = 28.6 MPa, marking a 1.15-fold improvement over the filler-free epoxy matrix, while reducing residual stresses from σres = 1.4 MPa to σres = 1.0 MPa. Higher filler content (40 - 60 %) led to decreased adhesive strength and increased residual stresses (σres = 0.62...0.69 MPa).