Tribological performance of boron-based superhard coatings sliding against different materials

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

doi:10.1016/j.wear.2021.203835

Cited by 14 publications

(9 citation statements)

References 9 publications

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“…Test samples were manufactured with varying concentrations of bismuth oxide, dispersed as nanoparticles in the surface layers. A distinctive methodology known as "high-energy, short-pulse laser melting" [13,14] was employed to integrate bismuth oxide into the steel matrix as nanoparticles. A distinguishing characteristic of this technology is the ultra-high rates of thermal cycling, capable of generating highly non-equilibrium states of materials, such as amorphous or nanocrystalline phases [25,26].…”

Section: Methodsmentioning

confidence: 99%

“…An exceptional feature of the technique is a high level of adhesion between the substrate and ceramic coatings [13,14].…”

Section: Methodsmentioning

confidence: 99%

“…For instance, coatings based on boron carbides exhibit a transition to low friction only under high normal loads and high sliding rates when temperatures exceed 160°C. In this case, the low coe cient of friction (COF) is linked to the formation of B-O-H bonds, resulting from the interaction of boron carbide in the coating with oxygen and moisture in the ambient air [13,14]. In another example, during the wear tests of nickel-zirconia coatings, intense sliding friction aids the creation of a third body via mutual mass transport from both surfaces in contact.…”

Section: Introductionmentioning

confidence: 99%

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Towards eliminating friction and wear in plain bearings operating without lubrication

Kharanzhevskiy,

Ipatov,

Makarov

et al. 2023

Preprint

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Plain bearings, owing to their versatility and simplicity, are extensively utilized in engineering design across a variety of industries involving moving parts. Lubrication is vital to the functioning of these bearings so 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. To incorporate the bismuth oxide into the surface layers of the steel, MnO2 was utilized as a carrier. Insights from transmission electron microscopy and X-ray photoelectron spectroscopy exposed a highly non-equilibrium state of matter, which is 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, and 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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Section: Methodsmentioning

confidence: 99%

“…An exceptional feature of the technique is a high level of adhesion between the substrate and ceramic coatings [13,14].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Towards eliminating friction and wear in plain bearings operating without lubrication

Kharanzhevskiy,

Ipatov,

Makarov

et al. 2023

Preprint

Self Cite

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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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“…The cubic form (c-BN) has the sphalerite (Zinc-Blende) crystal structure and hexagonal boron nitride (h-BN) has a layered structure similar to graphite. The transformation from h-BN into c-BN can occur only at high temperatures and pressures obtained during laser annealing or similar techniques like intensive energetic beam treatment of surfaces [27,29,30].…”

Section: Introductionmentioning

confidence: 99%

Structure diagram and dynamics of formation of hexagonal boron nitride in phase-field crystal model

Ankudinov

Galenko

2022

Phil. Trans. R. Soc. A.

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The phase-field crystal (PFC-model) is a powerful tool for modelling of the crystallization in colloidal and metallic systems. In the present work, the modified hyperbolic phase-field crystal model for binary systems is presented. This model takes into account slow and fast dynamics of moving interfaces for both concentration and relative atomic number density (which were taken as order parameters). The model also includes specific mobilities for each dynamical field and correlated noise terms. The dynamics of chemical segregation with origination of mixed pseudo-hexagonal binary phase (the so-called ‘triangle phase’) is used as a benchmark in two spatial dimensions for the developing model. Using the free energy functional and specific lattice vectors for hexagonal crystal, the structure diagram of co-existence of liquid and three-dimensional hexagonal phase for the binary PFC-model was carried out. Parameters of the crystal lattice correspond to the hexagonal boron nitride (BN) crystal, the values of which have been taken from the literature. The paper shows the qualitative agreement between the developed structure diagram of the PFC model and the previously known equilibrium diagram for BN constructed using thermodynamic functions. This article is part of the theme issue ‘Transport phenomena in complex systems (part 2)’.

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Tribological performance of boron-based superhard coatings sliding against different materials

Cited by 14 publications

References 9 publications

Towards eliminating friction and wear in plain bearings operating without lubrication

Towards eliminating friction and wear in plain bearings operating without lubrication

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

Structure diagram and dynamics of formation of hexagonal boron nitride in phase-field crystal model

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