Effect of oxygen in surface layers formed during sliding wear of Ni–ZrO2 coatings

Kharanzhevskiy, E. V.; Ipatov, A. G.; Макаров, А. В.; Гильмутдинов, Ф. З.; Соболева, Н. Н.; Krivilyov, M. D.

doi:10.1016/j.surfcoat.2022.128174

Cited by 13 publications

(5 citation statements)

References 45 publications

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“…By substituting the expressions t out and V T = ωr 1 / λ we obtain the magnitude of movement of point A at the detachment of contact with the soil (output). Therefore, (10) Knowing the values of the translational movement of the scraper plate X in and X out , it is easy to express the value of the segment S 0 movement of the scraper plate in the contact area of the scraper plate with the soil [13][14][15][16].…”

Section: Research Objectivesmentioning

confidence: 99%

Theoretical prerequisites for substantiating the parameters of a rotary ripper for interrow potato cultivation

et al. 2023

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The article is devoted to the study of the process of interaction of the rotary ripper’s working bodies with the soil. The classification of rotary machines and implements according to the energy transmitted to the working body and the location of the rotation axis is outlined. The article notes that the main characteristics of the rotor work body motion are the trajectory type, the magnitude and direction of velocity of its most characteristic point, and in some cases, the magnitude and direction of acceleration. The article presents the results of theoretical research in the field of kinematics of interaction of rotary working tools with the soil. The design of the rotary ripper is presented and the description of the trajectory of its working bodies is made, the value of movement of the scraper plate in the contact area with the soil is established. We analyzed the segment of the path from the beginning of contact with the soil (the beginning of dragging the surface layer of soil) and the end of contact (the end of dragging the surface layer of soil), on the line of which weed combing, loosening and destruction of soil crust occurs.

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Section: Research Objectivesmentioning

confidence: 99%

Theoretical prerequisites for substantiating the parameters of a rotary ripper for interrow potato cultivation

et al. 2023

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“…In Figure 8, it can be seen that the S2 coating had the smallest wear rate of 90.8 µm 3 /(m•N). It is worth mentioning that the S2 coating appeared to have two suddenly lower coefficients of friction, which was mainly due to the detection of the ZrO 2 phase by XRD and the fact that ZrO 2 is a good self-lubricating ceramic material [27], reducing the coefficient of friction. The wear rate of the S1 and S2 coatings was lower than that of the S3 and S4 coatings.…”

Section: Wear Properties and Wear Mechanismsmentioning

confidence: 99%

Effect of Energy Density on the Microstructure and Wear Resistance of Nickel-Based WC Coatings by Laser Cladding of Preset Zr702 Alloy Plates

et al. 2023

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This study aimed to evaluate the microstructure and wear resistance of laser cladding coatings with different energy densities in the case of a preset 0.5 mm thick Zr702 alloy plate to determine the specific present form of Zr elements and the optimal laser energy density. Thereby, microscopic characterization and performance tests were carried out by the microhardness tester, X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and tribometer. The results showed that, at different energy densities, the Zr elements in the coating were mainly in the form of ZrC and (Zr,W)C, which are hard particles with high wear resistance, and diffusely distributed in the coating to have second-phase-strengthening effects. Moreover, when the energy density was 28.3 J/mm2, the coating was well fused and had the highest microhardness of 936.4 HV0.2. The wear rate of the coating was the lowest at 90.8 μm3/(m·N). The wear was characterized by hard particle spalling and abrasive wear.

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“…This body, as a mechanically alloyed layer (MAL), prompts the transition to ultra-low friction, which only occurs at temperatures above 200 °C. Within the MAL, incorporated metals in their unoxidized state reduce the COF because adhesive forces and oxidation abilities between sliding bodies are successfully suppressed by the chemical composition of the MAL 20 .…”

Section: Introductionmentioning

confidence: 99%

Towards eliminating friction and wear in plain bearings operating without lubrication

Kharanzhevskiy,

Ipatov,

Makarov

et al. 2023

Sci Rep

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Plain bearings, renowned for their versatility and simplicity, are extensively utilized in engineering design across various industries involving moving parts. Lubrication is vital to the functioning of these bearings, yet their usage is inhibited under dynamic load conditions, or at elevated or reduced temperatures due to this dependency on lubrication. This study introduces an innovative method to significantly mitigate friction and wear in plain bearings operating without lubrication. The plain bearings were constructed from steel–bronze pairs, where the steel shafts were alloyed with bismuth oxide via short-pulse laser treatment. MnO2 was utilized as a carrier to incorporate the bismuth oxide into the surface layers of the steel. Insights from transmission electron microscopy and X-ray photoelectron spectroscopy revealed a highly non-equilibrium state of matter, unattainable through conventional engineering methods. The tribological performance of the modified steel disks was assessed via a block-on-ring sliding test, demonstrating superior wear and friction performance without lubrication, as well as an ultra-low coefficient of friction. Remarkably, the modified friction pairs remained functional after 200 km of linear sliding at a load of 250 N (12.5 MPa) and a sliding speed of 9 m/s. To substantiate the technique’s viability, we tested the performance of an internal combustion engine turbocharger fitted with a modified steel shaft. The turbocharger’s performance validated the long-term effectiveness of the steel–bronze coupling operating without lubrication at 75,000 rpm. The simplicity and resilience of this technique for modifying steel–bronze pairs offer a ground-breaking and promising approach for a wide range of applications.

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Effect of oxygen in surface layers formed during sliding wear of Ni–ZrO2 coatings

Cited by 13 publications

References 45 publications

Theoretical prerequisites for substantiating the parameters of a rotary ripper for interrow potato cultivation

Theoretical prerequisites for substantiating the parameters of a rotary ripper for interrow potato cultivation

Effect of Energy Density on the Microstructure and Wear Resistance of Nickel-Based WC Coatings by Laser Cladding of Preset Zr702 Alloy Plates

Towards eliminating friction and wear in plain bearings operating without lubrication

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