The Evolution of Tribomaterial During Sliding: A Brief Introduction

Rigney, D.A.; Karthikeyan, S.

doi:10.1007/s11249-009-9498-3

Cited by 159 publications

(85 citation statements)

References 20 publications

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“…We cannot answer these complex questions based on our experimental results; nevertheless, we can present a hypothesis based on a relatively simple model developed by Rigney et al [37]. They used molecular dynamics to simulate the sliding between two amorphous surfaces with different hardness and elastic moduli.…”

Section: Discussionmentioning

confidence: 95%

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: 95%

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

et al. 2012

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“…Nevertheless, a recent review indicated that deviations from Archard's law may take place owing to the large plane strains at the contact points and the adhesive transfer and mechanical mixing [7]. Several reports on the tribological behavior of copper [8][9][10] demonstrate the complex nature of wear; specifically, the wear rate may be a function of numerous parameters. Moreover, it was demonstrated very recently that significant grain refinement, and consequently, strengthening, may not lead to improved wear properties in commercial pure copper but rather to an increase in the steady-state wear rate with a consequent decrease in the electroconductivity [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing on wear resistance and electroconductivity of copper processed by high-pressure torsion

et al. 2013

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The influences of annealing temperature on the wear properties and electrical conductivity of Cu were studied after processing by high-pressure torsion (HPT). The annealing of Cu specimens processed by HPT leads to an increase in electroconductivity and a decrease in the wear rate. It is apparent that a nanotribolayer at the surface induced during wear sliding plays a more significant role than the ultrafine-grained structure. A slight increase was observed in the microhardness of HPT copper specimens upon annealing at a relatively low temperature (100°C), and this is most likely due to a change in texture. The annealing leads to an increase in the Taylor factor by *5 %, which is in good agreement with the increase in the microhardness level which is also by *5 %. It is apparent that low-temperature annealing of HPT copper may produce optimal properties of the specimens including high strength and electroconductivity with a lower wear rate.

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“…Targeting the materials response during running-in, Rigney et al investigated the involved mechanisms leading to changes in near-surface structure and to the introduction of foreign elements as result of intermixing processes [3,[5][6][7]. The third body is the prerequisite for ultra-low wear rates and small coefficients of friction.…”

Section: Introductionmentioning

confidence: 99%

Tribofilms Forming in Oil-Lubricated Contacts

2016

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Abstract:The subject of the present paper is the characterization of third bodies of run-in systems. By means of continuous friction and wear measurement, lubricated steel-steel and steel-aluminum contacts were evaluated. Microstructure, chemical composition and response of the materials to shear were analyzed by XPS/AES and focused ion beam technique. After a proper running-in, both systems developed a third body. The third body differs significantly from the base materials. In addition to adapted microstructure and near-surface chemistry, the third body exhibited a substructure characterized by a near-surface zone that accommodates shear and a second, deeper region that ensures strengthening.

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The Evolution of Tribomaterial During Sliding: A Brief Introduction

Cited by 159 publications

References 20 publications

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

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

Effect of annealing on wear resistance and electroconductivity of copper processed by high-pressure torsion

Tribofilms Forming in Oil-Lubricated Contacts

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