A revised interpretation of the mechanisms governing low friction tribolayer formation in alloyed-TMD self-lubricating coatings

Yaqub, Talha Bin; Vuchkov, Todor; Bruyère, Stéphanie; Pierson, Jean-François; Cavaleiro, A.

doi:10.1016/j.apsusc.2021.151302

Cited by 12 publications

(7 citation statements)

References 34 publications

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“…As shown in Fig. 32, the new solid lubricating coatings have relative high wear resistance in 100,000 cycles (wear rate ~ 10 -7 mm 3 /(N•m)), and that of the counter steel ball is extremely low (wear rate ~ 10 -10 mm 3 /(N•m)) at the same time [383].…”

Section: Physical Modelling and Testingmentioning

confidence: 94%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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Section: Physical Modelling and Testingmentioning

confidence: 94%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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“…Transition Metal Dichalcogenide (TMD) coatings are highly regarded for their exceptional solid-lubricating properties. Research into TMD coatings has been ongoing for several decades, with a growing emphasis on exploring their properties [ 1 , 2 , 3 , 4 , 5 ]. The antifrictional (low-friction) properties of TMD coatings are attributed to their hexagonal crystal lattice structure, which features layered atomic packing.…”

Section: Introductionmentioning

confidence: 99%

“…The antifrictional (low-friction) properties of TMD coatings are attributed to their hexagonal crystal lattice structure, which features layered atomic packing. The weak shear resistance between the basal planes is widely considered the primary factor contributing to the solid-lubricating behavior of TMD-based coatings [ 5 , 6 , 7 , 8 , 9 ]. However, this view of the friction mechanism does not fully explain the tribological variability seen in TMD coatings of varying phases, their chemical composition, or architecture.…”

Section: Introductionmentioning

confidence: 99%

“…However, this view of the friction mechanism does not fully explain the tribological variability seen in TMD coatings of varying phases, their chemical composition, or architecture. As a result, there is continuing interest in investigating the ways to enhance the wear resistance of TMD coatings in a variety of conditions (such as medium composition and temperature) and to achieve ultralow friction [ 4 , 5 , 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Tribological Performance of Low-Friction Nanocomposite WSexSy/NP-W Coatings Prepared by Reactive PLD

Fominski

Демин

et al. 2023

Nanomaterials

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A novel laser-based method for producing nanocomposite coatings consisting of a tungsten sulfoselenide (WSexSy) matrix and W nanoparticles (NP-W) was developed. Pulsed laser ablation of WSe2 was carried out in H2S gas under appropriate laser fluence and reactive gas pressure. It was found that moderate sulfur doping (S/Se ~0.2–0.3) leads to significant improvement in the tribological properties of WSexSy/NP-W coatings at room temperature. Changes in the coatings during tribotesting depended on the load on the counter body. The lowest coefficient of friction (~0.02) with a high wear resistance was observed in a N2 environment at an increased load (5 N), resulting from certain structural and chemical changes in the coatings. A tribofilm with a layered atomic packing was observed in the surface layer of the coating. The incorporation of nanoparticles into the coating increased its hardness, which may have influenced the formation of the tribofilm. The initial matrix composition, which had a higher content of chalcogen atoms ((Se + S)/W~2.6–3.5), was altered in the tribofilm to a composition close to the stoichiometric one ((Se + S)/W~1.9). W nanoparticles were ground and retained under the tribofilm, which impacted the effective contact area with the counter body. Changes in the tribotesting conditions—lowering the temperature in a N2 environment—resulted in considerable deterioration of the tribological properties of these coatings. Only coating with a higher S content that was obtained at increased H2S pressure exhibited remarkable wear resistance and a low coefficient of friction, measuring 0.06, even under complicated conditions.

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“…Reactionary pulsed laser deposition (RPLD) makes it possible to flexibly control the composition and structure of coatings in the Mo−S−C system, as well as to implement hydrogen incorporation [8]. Mo−S−C−H coatings can differ significantly in properties from the currently actively studied coatings in Mo−S, Mo−S−C and a-C(H) systems created mainly by the method of ion-plasma deposition [9,10]. Thus, Mo−S−C−H coatings obtained in [8] overpassed in tribological properties the a-C(H) coatings when tested in humid air and inert gas at low temperatures.…”

mentioning

confidence: 99%

Mechanism of tribo-induced structure modification for nanocomposite Mo-S-C-H thin film coatings

V.Yu.

M.V.

D.V.

et al. 2022

Technical Physics Letters

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Comparative studies of the tribological properties of solid lubricant coatings of three main types (MoS2, a-C(H)) and Mo-S-C-H in an inert gas medium have been carried out. It has been established that the coefficient of friction for the Mo-S-C-H nanocomposite coating is somewhat higher than for the other two. And its wear resistance is comparable to a-C(H) and higher than that of MoS2. The friction coefficient of the Mo-S-C-H coating was determined by the nature of tribo-induced surface modification. It included the formation of a nanofilm with a thickness of 6 nm and layered atomic packing characteristic of the MoS2 phase and graphitization of the a-C(H) nanophase, which was accumulated in wear debris. Keywords: nanocomposites, molybdenum disulfide, amorphous carbon, solid lubricant coatings, tribological properties.

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A revised interpretation of the mechanisms governing low friction tribolayer formation in alloyed-TMD self-lubricating coatings

Cited by 12 publications

References 34 publications

A review of advances in tribology in 2020–2021

A review of advances in tribology in 2020–2021

Enhanced Tribological Performance of Low-Friction Nanocomposite WSexSy/NP-W Coatings Prepared by Reactive PLD

Mechanism of tribo-induced structure modification for nanocomposite Mo-S-C-H thin film coatings

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