On tribological behaviour and application of TiN and MoS2-Ti composite coating for enhancing performance of monolayer cBN grinding wheel

Bhaduri, Debajyoti; Kumar, R. Suresh; Jain, Atul; Chattopadhyay, A.K.

doi:10.1016/j.wear.2010.01.013

Cited by 39 publications

(7 citation statements)

References 27 publications

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“…1,7,11,13,17 Recently two dimensional materials graphene and its analogous such as molybdenum disulfide (MoS2) have drawn great attention as promising candidate Pt catalyst support due to extremely high surface area and superior chemical stability. 13,14,[18][19][20][21][22] As a prototype compound of a two-dimensional layered transition-metal dichalcogenides (TMDs), 19 MoS2 has received great attention due to its many interesting properties and thus application in the fields of lubrications, [23][24][25][26] transistors, [27][28][29] catalysis and batteries. [30][31][32][33][34] Especially, nanostructured MoS2, has been intensified to be employed as HER electrocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS₂ Porous Thin Films for Enhancing Electrochemical Performance

Lee

Zhou

et al. 2019

Chem. Mater.

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A hybrid catalyst -Pt nanocrystals deposited on the surface of MoS2 vertically standing nanoplatelets is synthesized via chemical vapor deposition (CVD) and subsequent thermal annealing (TA) of Pt precursor.The hybrid material shows promising results as an electrocatalyst for the hydrogen evolution reaction (HER). By varying Pt synthesis condition -precursor loading and TA temperature -the deposition sites, size and morphology of Pt nanostructure can be controlled. The size effect of Pt nanoparticle on catalytic activity and sintering resistance is discussed. Results show that higher Pt loading yields better HER performance despite of smaller specific surface area; higher TA temperature delivers larger average particle size of Pt crystals and lower HER activity. Larger average size leads to fast sintering and thus poor durability of the catalyst. Based on the correlation between HER performance and growth behaviors of Pt on MoS2 surfaces, optimization route for a highly active and stable co-catalyst can be established.The optimized Pt-MoS2 catalyst (400 °C, 11 wt%) reported in this study possesses superior overpotential of 9 mV (close to zero), Tafel slope of 44mV/dec and moderate exchange current density of 373 µA/cm 2 ; 2 it exhibits activity degradation of 140 mV @ 20mA/cm 2 after 10,000 cycles. The Tafel slope indicates the combination of Volmer-Heyrovsky steps as HER mechanism in this particular hybrid catalyst system. The outstanding HER activity attributes to highly-dispersed Pt nanoparticles grown on MoS2 basal surfaces, large MoS2 edge density and Pt -S bonding effect induced activity improvement of MoS2 as well as 3D porous network assisted superaerophobic surface.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS₂ Porous Thin Films for Enhancing Electrochemical Performance

Lee

Zhou

et al. 2019

Chem. Mater.

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“…A grinding wheel's surface microgeometry belongs to the most important features influencing interactions between any grinding wheel and a work-piece during grinding. It decides, among other things, the magnitude of such parameters associated with the grinding process as grinding force, energy, and grinding temperature [1][2][3]. Thereby, a grinding wheel's geometry influences the grinding process flow and its effects, as well as the quality of the manufactured surface.…”

Section: Introductionmentioning

confidence: 99%

Determination of Selected Texture Features on a Single-Layer Grinding Wheel Active Surface for Tracking Their Changes as a Result of Wear

et al. 2020

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Measurements of the active surface microgeometry of the grinding wheel by contact and optical methods are commonly used to obtain a cloud of points representing the surface of the examined tool. Parameters that can be determined on the basis of the above-mentioned measurements can be universal parameters, which are commonly used to assess the geometric structure of a surface or parameters taking into account specific properties of the grinding wheel active surface (GWAS) structure. This article proposes a methodology for determining the average level of binder, which allows the definition the cut-off level required to separate from the measurement data: (i) the areas representing grains, (ii) the areas of gumming up of the grinding wheel, and (iii) deep cavities in approximately the same places on the investigated grinding wheel, regardless of the degree of its wear. This, in turn, allows one to track changes in characteristic parameters computed from measurements of texture in the above-mentioned areas due to different GWAS wear processes. The research was based on the analysis of data obtained from measurements of single-layer grinding wheels using the replica technique. The adopted measurement methodology enables measurement of approximately the same (94% coverage) areas of the GWAS at four stages of grinding wheel operation. Errors that were computed related to the determination of the volume of abrasive on the GWAS at various stages of wear using the developed methodology were lower, on average, by 48% compared to the automatic recognition of islands made with a commercial software.

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“…In order to enhance the tribological properties of pure MoS 2 coating, an appropriate amount of metal has been added into the sulfide matrix. Because of the addition of metal, the MoS 2 -metal lubricating coatings, such as MoS 2 -Ti [23][24][25], MoS 2 -Cr [26,27], MoS 2 -W [28], MoS 2 -Zr [29][30][31][32][33], MoS 2 -Ni [34] and MoS 2 -Pb [35], exhibit better properties in surface hardness and wear resistance, and have been successfully used in the machining field, such as drilling and turning.…”

Section: Introductionmentioning

confidence: 99%

Effect of Zr Target Current on the Mechanical and Tribological Performance of MoS2–Zr Composite Lubricating Coatings

et al. 2020

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To improve the tribological properties of pure MoS2 coating, the MoS2–Zr composite lubricating coatings were prepared on the WC/TiC/Co carbide surface utilizing radio frequency magnetron sputtering method combining with multiple arc ion plating technology. The effects of different Zr target currents on the surface morphologies, roughness, Zr content, adhesive force, thickness, microhardness and tribological behaviors of the composite coatings were systematically investigated. Results showed that the properties of MoS2 coating can be remarkably enhanced through co-deposition of a certain amount of Zr. As the Zr target current increased, the Zr content, surface roughness, thickness, and micro-hardness gradually increased, while the adhesive force of coatings increased first and then decreased. The friction behaviors and wear modes of the composite coatings both varied obviously with the increase of Zr current. The mechanism was mainly attributed to the different components and mechanical properties of the coatings caused by various Zr current.

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On tribological behaviour and application of TiN and MoS2-Ti composite coating for enhancing performance of monolayer cBN grinding wheel

Cited by 39 publications

References 27 publications

Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS₂ Porous Thin Films for Enhancing Electrochemical Performance

Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS₂ Porous Thin Films for Enhancing Electrochemical Performance

Determination of Selected Texture Features on a Single-Layer Grinding Wheel Active Surface for Tracking Their Changes as a Result of Wear

Effect of Zr Target Current on the Mechanical and Tribological Performance of MoS2–Zr Composite Lubricating Coatings

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On tribological behaviour and application of TiN and MoS2-Ti composite coating for enhancing performance of monolayer cBN grinding wheel

Cited by 39 publications

References 27 publications

Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS2 Porous Thin Films for Enhancing Electrochemical Performance

Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS2 Porous Thin Films for Enhancing Electrochemical Performance

Determination of Selected Texture Features on a Single-Layer Grinding Wheel Active Surface for Tracking Their Changes as a Result of Wear

Effect of Zr Target Current on the Mechanical and Tribological Performance of MoS2–Zr Composite Lubricating Coatings

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Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS₂ Porous Thin Films for Enhancing Electrochemical Performance

Synthesis of Surface Grown Pt Nanoparticles on Edge-Enriched MoS₂ Porous Thin Films for Enhancing Electrochemical Performance