Alloying MoS2 with Al and Au: structure and tribological performance

Holbery, James D.; Pflueger, E.; Savan, Alan; Gerbig, Y.; Luo, Quanshun; Lewis, D.B.; Münz, W.‐D.

doi:10.1016/s0257-8972(03)00203-2

Cited by 47 publications

(12 citation statements)

References 8 publications

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“…There are several reports dealing with thin films based on TMD alloyed with metals, such as (Ti [6,7,27], Al [28], Au [29,30], Pb [31], Ni [32,33], Cr [34,35]); the effects of doping metal on the coating structure, density, or mechanical properties are well studied. However, the role of doping metal in the tribological contact remains reactions of the metals with residual atmosphere in the deposition chamber, particularly with oxygen.…”

Section: Discussionmentioning

confidence: 99%

Complex frictional analysis of self-lubricant W-S-C/Cr coating

et al. 2012

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Transition metal dichalcogenides belong to one of the most developed class of materials for solid lubrication. However, one of the main drawbacks of most of the self-lubricating coatings is their low load-bearing capacity, particularly in terrestrial atmospheres. In our previous works, alloying thin films based on tungsten disulfide with non-metallic interstitial elements, such as carbon or nitrogen, has been studied in order to improve tribological performance in different environments.Excellent results were reached with the deposited coatings hardness, in some cases, more than one order of magnitude higher than single W-S films. 2In this work, W-S-C films were deposited with increasing Cr contents by co-sputtering chromium and composite WS 2 -C and targets. Two films were prepared with approx. 7 and 13 at.% of Cr.Alloying with chromium led to dense films with amorphous microstructure; the hardness and adhesion was improved. Sliding tests were carried out in dry and humid air using pin-on-disc with 100Cr6 steel ball as a counterpart. To analyse the sliding process, the surfaces in the contact were investigated by X-ray photoelectron spectroscopy (bonding), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy (TEM). Surface and sub-surface structural modification of the coating and composition of the transferred tribolayer are discussed in detail. High friction in humid air was attributed to the absence of well-ordered WS 2 sliding interface. On the other hand, the existence of such interface explained a very low friction observed in dry air.

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Section: Discussionmentioning

confidence: 99%

Complex frictional analysis of self-lubricant W-S-C/Cr coating

et al. 2012

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“…We presume that they are domains of Au (higher friction) and MoS 2 (lower friction). In similar composite coatings, it has been found that metals do not undergo bulk chemical reaction with MoS 2 [9], but exist as uniformly distributed particles [10].…”

Section: Resultsmentioning

confidence: 99%

“…For these applications, it is critical to maintain low interfacial friction, wear, and electrical resistance over an extended period of operation. Tribological and structural properties of various MoS 2 -based coatings have been studied for many years [1][2][3][4][5][6][7][8][9][10] using macro-and microscale techniques, including tribometry, x-ray diffraction (XRD), micro-Raman spectroscopy, and extended x-ray absorption fine structure (EXAFS). Lubricating properties of these coatings have been attributed to several interfacial phenomena, including transfer film formation [5], crystal structure [3,6,7], and orientation [8] of MoS 2 crystallites at the sliding interface.…”

Section: Introductionmentioning

confidence: 99%

Direct visualization of sliding-induced tribofilm on Au/MoS2 nanocomposite coatings by c-AFM

Kim

Lince

2006

Tribol Lett

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The nanoscale lubrication mechanism of nanocomposite Au/MoS 2 solid lubricant coatings has been studied by conductive atomic force microscopy (c-AFM). A direct visualization of the lubricating process suggests tribomechanical formation of a MoS 2 tribofilm to be a key mechanism. The sliding-induced tribofilm formation was visualized by a reduction in local friction and conductivity in nanoscale AFM images. The tribofilm was found to possess considerable crystallinity and orientation, which was not observed in the as-deposited coatings. The observed mechanism is broadly applicable to a range of nanocomposite metal/MoS 2 coatings.

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“…20,24,25 In addition, it is an effective way to improve the tribological property of MoS 2 coating by doping elements in MoS 2 coating. The doped elements [27][28][29][30][31] (including Au, Ag, Cu, Ti, Cr, W) and non-metallic elements [32][33][34][35] (including C, Si and N) could effectively enhance the mechanical and tribological properties of MoS 2 coating if properly conducted.…”

Section: Introductionmentioning

confidence: 99%

A study on the tribological property of MoS₂/Ti–MoS₂/Si multilayer nanocomposite coating deposited by magnetron sputtering

Kong

Wei

et al. 2020

RSC Adv.

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Alloying MoS2 with Al and Au: structure and tribological performance

Cited by 47 publications

References 8 publications

Complex frictional analysis of self-lubricant W-S-C/Cr coating

Complex frictional analysis of self-lubricant W-S-C/Cr coating

Direct visualization of sliding-induced tribofilm on Au/MoS2 nanocomposite coatings by c-AFM

A study on the tribological property of MoS₂/Ti–MoS₂/Si multilayer nanocomposite coating deposited by magnetron sputtering

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Alloying MoS2 with Al and Au: structure and tribological performance

Cited by 47 publications

References 8 publications

Complex frictional analysis of self-lubricant W-S-C/Cr coating

Complex frictional analysis of self-lubricant W-S-C/Cr coating

Direct visualization of sliding-induced tribofilm on Au/MoS2 nanocomposite coatings by c-AFM

A study on the tribological property of MoS2/Ti–MoS2/Si multilayer nanocomposite coating deposited by magnetron sputtering

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A study on the tribological property of MoS₂/Ti–MoS₂/Si multilayer nanocomposite coating deposited by magnetron sputtering