Boride-Carbon Hybrid Technology for Ultra-Wear and Corrosive Conditions

Baule, Nina; Kim, Young S.; Zeuner, A.; Haubold, Lars; Kühne, Robert; Eryilmaz, O. L.; Erdemir, Ali; Hu, Zhong; Zimmermann, Martina; Schuelke, Thomas; Fan, Qihua

doi:10.3390/coatings11040475

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…Many studies have been conducted on different wear mechanisms based on deformation states 1 such as adhesive, 2,3 abrasive, 4,5 fatigue, 6,7 and corrosive wear. 8,9 However, understanding the corresponding differences, which rely more on empirical observations and microscopic studies, are yet remained unclear. 10 This goal has not been achieved via an available physical model 11 and calls for a more accurate and fundamental look.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the adhesive and abrasive wear mechanisms at the atomic scale using molecular dynamic simulations

Joneidi

Shamshirsaz

Taghvaeipour

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this study, the effect of adhesion on material removal is numerically investigated at the nanoscale level. In this regard, Molecular Dynamics (MD) simulations are conducted to distinguish the contribution of adhesive and abrasive wear mechanisms during a scratching process in terms of the degree of interfacial adhesion and scratching depth. The numerical model simulates the scratching of a flat workpiece made of a single crystalline aluminum using a rigid conical indenter with a blunted spherical tip at four different indentation depths (i.e. 0, 3, 7, and 10 Å). The classical Leonard-Jones interatomic potential is used to mimic the degree of adhesion by varying the adhesion parameter between 5–70% of the aluminum bonding energy. It is shown that, at shallow scratching depths, the contribution of adhesive work to the frictional work is much larger than the ploughing work. On the contrary, the ratio of adhesive to ploughing work reduces by increasing the scratching depth.

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Section: Introductionmentioning

confidence: 99%

Investigation of the adhesive and abrasive wear mechanisms at the atomic scale using molecular dynamic simulations

Joneidi

Shamshirsaz

Taghvaeipour

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…They are used to harden the surface of parts and structural materials in the field of mechanical engineering [2]. They are characterized by high hardness, resistance to wear [3], corrosion [4], and high thermal stability [5]. For example, wurtzite boron nitride has comparable hardness to natural diamond [6].…”

Section: Introductionmentioning

confidence: 99%

Electron-Beam Synthesis and Modification and Properties of Boron Coatings on Alloy Surfaces

et al. 2022

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In this study, fore-vacuum plasma electron beam sources were used to deposit a few micron-thick boron coatings on A284 and ZrNb1 alloys and modify their surfaces. The coating deposition rate with a continuous 1 kW electron beam that evaporated the boron target at a distance of 10 cm was 0.5 µm/min, and the boron coating density was 2.2 g/cm3. Based on the comparison of data on the mass-to-charge composition, beam plasma density, and coating parameters, the contribution of the plasma phase of the evaporated material to the growth of coatings was greater than that of the vapor phase. Using the scanning electron and atomic force microscopy techniques, surface modification by repeated electron beam pulses with electron energies of 8 and 6 keV and a beam power per pulse of 2 J/cm2 and 2.25 J/cm2, respectively, transformed a relatively smooth coating surface into a hilly structure. Based on a structural phase analysis of coatings using synchrotron radiation, it was concluded that the formation of the hilly coating structure was due to surface melting under the repeated action of electron beam pulses. The microhardness, adhesion, and wear resistance of coatings were measured, and their corrosion tests are presented herein. The pure boron coatings obtained and studied are expected to be of use in various applications.

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Nitrogen-incorporated tetrahedral amorphous carbon optically transparent thin film electrode

Baule,

Haubold,

Schuelke

2024

Journal of Vacuum Science &Amp; Technology A

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Nitrogen-incorporated tetrahedral amorphous carbon (ta-C:N) has electrochemical properties that are comparable to boron-doped diamond (BDD), but can be deposited at low temperatures, and is scalable across substrate areas substantially exceeding what is currently possible for BDD. Most published studies of ta-C:N electrodes focus on films deposited on conductive substrates due to the relatively high resistivity of ta-C:N compared to other carbon and metal-based electrodes. However, some of the most compelling applications of electrochemistry, for example, optically transparent spectroelectrochemical devices, require insulating substrates such as fused silica glass (FSG) or polymers. In this study, we deposited 50 nm of ta-C:N by laser controlled pulsed cathodic vacuum arc (Laser-Arc) onto insulating FSG to investigate the electrochemical response compared to conductive silicon (c-Si) substrates. No oxidation or reduction of potassium ferrocyanide during cyclic voltammetry (CV) could be observed at the FSG electrode. To address this, we introduced a 5 nm chromium (Cr) interlayer deposited by magnetron sputtering between ta-C:N and FSG. This electrode configuration led to clear cathodic and anodic CV peaks of potassium ferro/ferricyanide but with an increased peak separation compared to the c-Si electrode. However, the peak separation could be reduced to values comparable to ta-C:N deposited on c-Si by optimizing Cr sputtering conditions and introducing an argon plasma pretreatment of the FSG surface. Atomic force microscopy revealed that these changes improved the Cr growth homogeneity, which in turn increased the electrical conductivity of the Cr interlayer as determined by 4-point probe measurements.

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Boride-Carbon Hybrid Technology for Ultra-Wear and Corrosive Conditions

Cited by 4 publications

References 41 publications

Investigation of the adhesive and abrasive wear mechanisms at the atomic scale using molecular dynamic simulations

Investigation of the adhesive and abrasive wear mechanisms at the atomic scale using molecular dynamic simulations

Electron-Beam Synthesis and Modification and Properties of Boron Coatings on Alloy Surfaces

Nitrogen-incorporated tetrahedral amorphous carbon optically transparent thin film electrode

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