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1.
A. S. Anikeev I. V. Blinkov V. V. Ivanov A. I. Laptev V. S. Chelnokov I. Yu. Kuchina 《Russian Journal of Non-Ferrous Metals》2017,58(4):449-455
Samples of Al2O3–TiO2 coatings are fabricated by the flame spraying of a flexible cord. The influence of process parameters and composition of the sprayed material on the structure, composition, and mechanical properties of coatings is investigated. It is shown that an increase in the spraying distance and feed rate of the sprayed material leads to a decrease in their density. An increase in the concentration of the low-melting TiO2 component predetermines a decrease in the coating porosity and has no significant effect on the coating hardness. Being subjected to measuring scratching, Al2O3–TiO2 flame coatings formed with minimal porosity (Π = 3.2%) are characterized by cohesion fracture behavior and no substrate opening under an indenter load of up to 90 N. The friction factor of coatings under study varies from 0.2 to 0.78 after 2800 counterbody revolutions (44 m of the friction path). This is associated with the accumulation of fatigue cracks in the coating material and its subsequent cohesive fracture by the formation of large fragments serving as an abrasive. 相似文献
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I. V. Blinkov D. S. Belov A. O. Volkhonskii Yu. A. Pustov F. V. Kiryukhantsev-Korneev V. N. Anikin V. S. Sergevnin I. Yu. Kuchina 《Protection of Metals and Physical Chemistry of Surfaces》2016,52(1):81-88
In this work, thermal stability and oxidation resistance at temperatures up to 800°C are studied for (Ti,Al)N–(8–10 at %)Ni coatings with a thickness on the order of 4 µm and a crystallite size below 20 nm, which have been prepared via ion–plasma vacuum arc deposition. The composition and structural characteristics of coatings remain stable during 1-h heating in vacuum of 10–4 Pa at temperatures of 600 and 700°C. Heating at a temperature of 800°C leads to an increase in the crystallite size and a decrease in microstrains of a ceramic phase, which is accompanied by a reduction in the hardness of the coating from 51–53 to 31–33 GPa. The coatings are heat resistant up to 800°C and characterized by cohesive failure in scribing. The adhesive strength of coatings with a substrate exceeds 85 N. Studying electrochemical behavior reveals the high efficiency of (Ti,Al)N0.87–Ni coatings in corrosion protection of cutting tools in acid and alkaline environments. 相似文献
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Demirov A. P. Blinkov I. V. Kuznetsov D. V. Kuskov K. V. Kolesnikov E. A. Sedegov A. S. 《Russian Journal of Non-Ferrous Metals》2021,62(5):602-610
Russian Journal of Non-Ferrous Metals - This article discusses methods for producing a material with gradient multilevel porosity by sintering layer-by-layer distributed α-Fe2O3 nanopowders... 相似文献
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I. V. Blinkov A. O. Volkhonskii A. V. Chernogor V. S. Sergevnin D. S. Belov A. M. Polyanskii 《Inorganic Materials》2018,54(5):437-445
Using an arc physical vapor deposition process, we have produced nanostructured Mo–Si–Al–Ti–Ni–N coatings with a multilayer architecture formed by Mo2N, AlN–Si3N4, and TiN–Ni and a crystallite size on the order of 6–10 nm. We have studied the physicomechanical properties of the coatings and their functional characteristics: wear resistance, adhesion to their substrates, and heat resistance. According to high-temperature (550°C) wear testing and air oxidation (600°C) results, the coatings studied here are wearand heat-resistant under appropriate temperature conditions. Their properties are compared to those of Mo–Si–Al–N coatings. 相似文献
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Chernogor A. V. Blinkov I. V. Belov D. S. Sergevnin V. S. Volkhonskii A. O. 《Technical Physics Letters》2019,45(2):75-78
Technical Physics Letters - The results of the simulation of plasma fluxes onto the surface of rotating substrates during the combustion of a vacuum arc of the Cr–Ti–Mo cathode system... 相似文献
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