Ion-Plasma Spraying and Electron-Beam Treatment of Composite Cr-Al-Co-ZrO2-Y2O3 Coating on the Surface of Ni-Cr Alloy

Zhilkаshinova, Almira; Аbilev, Мadi; Павлов, А. В.; Prokhorenkova, N.; Skakov, Маzhyn; Градобоев, А. В.; Zhilkashinova, Assel

doi:10.3390/coatings11030321

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…The coatings were deposited on a single-crystal silicon substrate with the [100] crystallographic orientation. Coating was carried out by the magnetron method on an ion-plasma setup, which was a vacuum chamber with two magnetron sputtering systems of an unbalanced type and an ion source with a closed electron drift [24].…”

Section: Methodsmentioning

confidence: 99%

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Effect of Heat Treatment on the Structural-Phase State and Properties of a Multilayer Co-Cr-Al-Y Coating

et al. 2022

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The article describes the effect of heat treatment on the structural-phase state and properties of a multilayer Cr-Al-Co-Y coating obtained by magnetron sputtering. Heat treatment was carried out at 400, 800 and 1000 °C. The study of the microstructure was carried out by electron microscopy with energy dispersive analysis and powder X-ray diffraction. The surface of the samples was studied by atomic force microscopy. The thickness of the Co-Cr-Al-Y coatings was 1.5–1.7 ± 0.2 µm. The obtained coatings are characterized by a hardness of 4.7–6.4 GPa. A distinctive feature of the layers is the absence of a crystalline structure in some areas of the coating. The main process occurring during the thermal treatment is the formation of a spinel-type phase. For a single-layer sample after heat treatment at 400 °C, it was not possible to fix extraneous reflections except for the reflections of the silicon substrate 111 and 220. For the rest of the samples, the appearance of reflections of a number of phases was noticed, such as: SiO2, CoO, AlSi0.5O2.5 and CrAl0.42Si1.58. An increase in the treatment temperature up to 800 °C did not lead to significant changes. In the case of the multilayer sample, the reflections of various impurity phases disappeared and the Co3O4 phase was formed. For samples treated at 1000 °C, the formation of a spinel-type phase (Co3O4-CoCr2O4) was observed in all cases. Data on the structural-phase state and properties of the multilayer Co-Cr-Al-Y coating can be used to predict the nature of such coatings after heat treatment.

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Section: Methodsmentioning

confidence: 99%

“…Previously, we have studied composite (Cr-Al-Co + ZrO 2 -Y 2 O 3 ) coatings on a Ni-Cr alloy substrate [24]. The coating with a total layer thickness of 17-18 µm was obtained by magnetron sputtering, including an inner layer (Cr-Al-Co) with a thickness of 10-11 µm and an outer ceramic layer (ZrO 2 -Y 2 O 3 ) with a thickness of 6-7 µm.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on the Structural-Phase State and Properties of a Multilayer Co-Cr-Al-Y Coating

et al. 2022

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“…Але ефективність роботи цих відповідальних деталей залежить від довговічності, яка в цьому разі передбачає зменшення або зведення до нуля небезпеки зміцнення поверхні, та від такого важливого показника, як корозійна стійкість [5][6][7][8]. На основі аналізу робіт, присвячених використанню плазмових покриттів [9][10][11][12], обрано покриття системи Ti-Cr-N з попереднім іонним бомбардуванням поверхні хромом. Як матеріал для іонного бомбардування був обраний Cr, оскільки він дає змогу знизити температуру підкладки перед нанесенням покриття та уникнути небезпеки розміцнення поверхні.…”

Section: вступunclassified

Application of modern fractal formalism methods for researching the influence of ion-plasma coatings on assessing the wear resistance of volume hydraulic drive components

Hlushkova,

Bagrov,

Volchuk

2023

Bulletin of KhNAHU

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Problem. The studies on preparation and application of Ti–Cr–N coating on the surface of the 38Х2МЮА steel have been conducted. Goal. The purpose of the work is to investigate the feasibility of using a fractal approach to evaluate the effect of plasma coatings to increase the wear resistance of parts of a volumetric hydraulic drive. Methodology. Cr was chosen as the material for ion bombardment, since it makes it possible to reduce the temperature of the substrate before applying the coating and avoid the risk of surface softening. After heat treatment of the 38Х2МЮА steel, its hardness ranges from 40 to 45 HRC. The thickness of the applied coating varied from 3 to 6 microns, which corresponds to good adhesion, a smaller thickness does not significantly affect the properties of the product, and in the case of a thickness of more than 6 microns, peeling is observed due to poor adhesion to the substrate. Results. Five series of experiments with HRC hardness values of 42, 43, 44, 45, 46 were performed. Fractal analysis was used to assess the effect of the Ti–Cr–N coating structure of the working surface of volumetric hydraulic drive parts on its wear indicators. The relative error in calculating wear indicators for fractal models ranged from 0.04 to 8.96. The correlation coefficient of Y(X2) model without using indicators of the surface fractal dimension was only 0.73. Experiments proved that the lowest wear value of 2.11 g*10-3 was obtained at a coating thickness of 6 µm and hardness of 45 HRC. At the same time, a roughness coefficient was 0.16. To confirm this hypothesis, an experiment to determine wear resistance at a hardness of 45, roughness of 0.16, and coating thickness of 6 was conducted. Conclusions. Results of the studies of wear indicators of Ti–Cr–N coated samples at the substrate material hardness values from 42 to 46 HRC, surface roughness and coating thickness showed feasibility of the fractal structure estimation approach.

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“…During such a transition, both the optical and electrical constants of the material experience a change. Above a temperature of 67 °C, the material has metallic conductivity, at a temperature below 67 °C, the material has semiconductor properties [ [1], [2], [3]]. The conductivity of the material of sunlight, infrared rays decreases 3-5 times.…”

Section: Introductionmentioning

confidence: 99%

Investigation of optical and physico-chemical properties of titanium-doped V₂O₅ nanofilms

Aimbetova¹,

Jiménez-Castañeda²,

Clavijo-Blanco³

et al. 2022

KIMS/CUMR/MShKP

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In this paper, undoped and Ti-doped V2O5 thin ﬁlms were fabricated and deposited onto glass substrates using a «doctor blading» method. Then, the effects of Ti-doping on the optical properties of the thin ﬁlms were investigated. Titanium doping concentration of 0.25-0.75 at.% has been investigated. After treatment in air at different temperatures, the obtained films was characterised by various techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD) and photoluminescence (PL). It was found that the as-obtained doped films possessed thermochromic properties and optical switching characters. According to optical tests, thin linings of vanadium dioxide alloyed with Ti have optical properties that are effective for application. Because of their capacity to automatically control interior solar irradiation, lower air-conditioning energy consumption, and maintain a comfortable internal thermal climate, smart windows have drawn increased interest in recent years. The doping strategy and integrating with functional coatings can regulate the properties of obtained V2O5 ﬁlms.

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Ion-Plasma Spraying and Electron-Beam Treatment of Composite Cr-Al-Co-ZrO2-Y2O3 Coating on the Surface of Ni-Cr Alloy

Cited by 6 publications

References 20 publications

Effect of Heat Treatment on the Structural-Phase State and Properties of a Multilayer Co-Cr-Al-Y Coating

Effect of Heat Treatment on the Structural-Phase State and Properties of a Multilayer Co-Cr-Al-Y Coating

Application of modern fractal formalism methods for researching the influence of ion-plasma coatings on assessing the wear resistance of volume hydraulic drive components

Investigation of optical and physico-chemical properties of titanium-doped V₂O₅ nanofilms

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