Tribological behaviour of laser textured Ti6Al4V alloy coated with MoS2 and graphene

Arenas, M.A.; Ahuir-Torres, J.I.; Garcia, Idelmo Rangel; Carvajal, H.; Damborenea, J. de

doi:10.1016/j.triboint.2018.07.031

Cited by 64 publications

(39 citation statements)

References 31 publications

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“…The graphene flakes of nanosheets (Avanzare Innovacion Tecnologica S.L., Navarrete (La Rioja), Spain) with an average size of 250 nm were used. A detailed characterization of these nanosheets can be found elsewhere [21].…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, graphene is a prospective solid lubricant due to its ability to form a tribofilm that prevents the direct contact of the asperities of the surfaces in relative motion and, consequently, reducing friction and wear rate [19][20][21]. Literature has also reported the positive influence on steel, epoxy and ceramic tribo-contacts of the addition of graphene or graphene oxide, either mono or multilayer, into ionic liquid lubricants, i.e., different alkyl imidazolium ILs with trifluoromethylsulfonyl or fluoroborate anions [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants

et al. 2019

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Deep eutectic ionic liquids (DES) possess similar properties to conventional ionic liquids (ILs). However, ILs cannot be considered as environmentally friendly compounds due to both its processing and synthesis, which could have significant polluting effects. On the contrary, deep eutectic solvents (DESs) can be biodegradable, non-toxic, and have a lower price than most ILs, making them potentially useful in a wide variety of advanced technological applications, such as tribology. On the other hand, graphene has recently been proposed as an extremely promising lubricant due to its combination of mechanical properties and chemical stability as well as its “green” character. In the present paper, graphene flakes (≈250 nm) have been used as an additive to DES composed of choline chloride (ChCl)-urea, ChCl-ethylene glycol, and ChCl-malic acid. According to the results, the addition of 1 wt% graphene reduces friction coefficient (COF) and, notably, prevents adhesive wear, reducing wear rate on steel-steel sliding contacts.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants

et al. 2019

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“…The control and prediction of friction and wear has become increasingly important with the need for more efficient machines and more advanced manufacturing strategies. Over the last two decades, laser surface texturing has been intensively explored as a means for improving tribological properties [1][2][3] and has been shown to reduce friction and wear [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Influence of dimple shape on tribofilm formation and tribological properties of textured surfaces under full and starved lubrication

Zheng

Abuflaha

et al. 2019

Tribology International

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Lubrication conditions have significant influences on the formation of tribofilms and then affect tribological behavior. In this work, the influence of tribofilm formation on the tribological behavior of textured surfaces with oval shapes was measured using a pin-on-plate tribometer. The results show that, under full lubrication, the adsorbed oil film controlled the friction and wear behavior of steel/steel tribopairs but under starved lubrication, the formation of a tribofilm significantly influenced the tribological behavior. The appropriate textured surfaces with oval-shaped dimples contributes to obtaining excellent antifriction and antiwear behavior. However, excessively high ratios of the major to the minor axis of the oval can result in high contact stresses which can destroy the tribofilm.

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“…There are several reported works on nano/micro-texturing of different materials such as the improvement of cell adhesion in metallic bio-implants or tribological properties of mechanical components, self-cleaning, corrosion protection, and other applications [25,26]. The lasers used were short-pulse lasers [27][28][29][30][31][32] as well as ultra-short pulses [31,[33][34][35][36]. However, the application of laser texturing to modify the wettability of stones is scarce or even nonexistent [37,38].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Laser Surface Texturing: A Sustainable Tool to Modify Wettability Properties of Marble

et al. 2019

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Conservation strategies to reduce the degradation of stone caused by the action of water are focusing on increasing the hydrophobicity of the surface by imitating existing solutions in nature (lotus leafs and others). These are mainly based on the existence of hierarchical roughness with micro- and nanoscale structures. In the case of marble, research has focused on protective coatings that sometimes are dangerous for the health and the environment, and with undesirable effects such as color changes or reduction of water vapor permeability of the stone. Laser texturing, however, is an environmentally friendly technique, because no chemicals or toxic waste are added and, moreover, it can process nearly all types of materials. It has been used to change the surface texture of metals and other materials on a micro or even nanometric scale, to meet a specific functional requirement, such as hydrophobicity. The objective of this work was to analyze the feasibility of this technique to provide hydrophobic properties to a marble surface without appreciable changes in its appearance. Therefore, an analysis of the irradiation parameters with ultra-short-pulse laser was performed. Preliminary results demonstrate the ability of this technique to provide hydrophobic character the marble (contact angles well above 90 ∘ ). Besides, the analysis of the treated surfaces in terms of roughness, color and gloss indicates that changes in the appearance of the surface are minimal when properly selecting the process parameters.

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Tribological behaviour of laser textured Ti6Al4V alloy coated with MoS2 and graphene

Cited by 64 publications

References 31 publications

Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants

Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants

Influence of dimple shape on tribofilm formation and tribological properties of textured surfaces under full and starved lubrication

Ultrafast Laser Surface Texturing: A Sustainable Tool to Modify Wettability Properties of Marble

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