Environmental effect on the load-dependent friction behavior of a diamond-like carbon film

Cui, Longchen; Lu, Zhibin; Wang, Liping

doi:10.1016/j.triboint.2014.10.014

Cited by 46 publications

(19 citation statements)

References 34 publications

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“…According to the above analysis in Figure 4, the amorphous carbon structure is initially formed on wear scar during sliding, with increasing the sliding time, the amorphous carbon is gradually transformed into graphene layers. The flush temperature rises as an important factor to moderate this transformation 16,17 . The flash temperature at contact area during friction processes could be estimated by the following equation 18 :

Δ T = \frac{μ F_{n} normalυ}{8 α K_{italicYG 8 italicball}},

where ΔT is the flash temperature friction induced between two contact areas, μ is the friction coefficient, F n is the applied load of 98 N in this study, υ is the sliding velocity and equals to 1.1 m/s, α is the contact radius of the real contact area, and K YG8 ball is thermal conductivities of YG8 ball of 75 W/m K 19 .…”

Section: Resultsmentioning

confidence: 99%

Is graphene formed on WC surface under glycerol lubrication? Yes

Chen

Zhang

et al. 2020

Surface & Interface Analysis

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Recently, most of the researchers focused on investigating the superlubricity of glycerol or glycerin/water solutions, yet all of them have no attempt to follow with performance about their lubricity under high load and fast rotational speed. In this article, the lubricity of glycerol was systematically investigated under 98 N and 1,450 rpm using a four‐ball wear machine. Interestingly, results showed that friction‐induced graphene layers were first discovered during sliding, meanwhile, friction‐induced graphene layers were closely related to the high flush temperature rise and catalysts. The synergy of graphene and glycerol elastohydrodynamic film on wear scar played an important role in obtaining low friction and wear‐less.

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Δ T = \frac{μ F_{n} normalυ}{8 α K_{italicYG 8 italicball}},

Section: Resultsmentioning

confidence: 99%

Is graphene formed on WC surface under glycerol lubrication? Yes

Chen

Zhang

et al. 2020

Surface & Interface Analysis

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“…Furthermore, the uniform velocity dependence also indicates that the friction and wear resistance of H-DLC film influenced by sliding velocity may be attributed to the same tribological mechanisms. Previously, three main friction mechanisms of DLC films have been widely recognized, including graphitization mechanism (i.e., graphitization of the DLC material beneath worn surface) [27][28][29], transfer layer mechanism (i.e., formation of a graphitized transfer layer at the sliding interface) [30][31][32], and passivation mechanism (i.e., saturation of dangling bonds of carbon atoms at the sliding interface with passivating species) [6,21,33]. Nonmonotonic variation of the friction and surface wear with the sliding velocity (Figures 2 and 4) implies that one of the above-mentioned mechanisms alone cannot explain the observed phenomenon.…”

Section: Test Methodsmentioning

confidence: 99%

“…According to the passivation mechanism [6,21,33], saturation of the dangling carbon bonds on the sliding interface with passivating species may result in a low friction coefficient. In the present study, the water molecules, nitrogen and other gases in air may influence the friction behavior of H-DLC film.…”

Section: Role Of Surface Passivation In the Velocity-dependencementioning

confidence: 99%

Perspectives of the Friction Mechanism of Hydrogenated Diamond-Like Carbon Film in Air by Varying Sliding Velocity

et al. 2018

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The purpose of the present work is to probe the friction mechanism of hydrogenated diamond-like carbon (H-DLC) film in air by varying sliding velocity (25-1000 mm/s). Friction tests of Al 2 O 3 ball against H-DLC film were conducted with a rotational ball-on-disk tribometer. As the sliding velocity increases, both the friction coefficient and the surface wear of H-DLC film decrease, reach the minimum values, and then increase in the high sliding velocity region. Based on the observed results, three main friction mechanisms of H-DLC film-namely graphitization mechanism, transfer layer mechanism, and passivation mechanism-are discussed. Raman analysis indicates that the graphitization of worn surface on the H-DLC film has a negligible contribution to the variation of the friction coefficient and the surface wear. The origin of the sliding velocity dependence is due to the synergistic interaction between the graphitized transfer layer formation and the surface passivation. The present study will not only enrich the understanding of friction mechanism of H-DLC films in air, but will also help to promote their practical engineering applications.

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“…However, the environment can have a profound impact on the friction and wear of the contacting material surfaces, as adsorbed contaminants can cause changes at the asperity level and so-called third bodies [3] are generated with different chemical compositions and morphologies [4]. Therefore, it is important to understand the environmental effects on friction and wear of different metallic materials, and to that end, several experiments have been carried out at both the microscale [5][6][7][8][9][10][11][12] and nanoscale [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Environment on Microstructure Evolution and Friction of Au–Ni Multilayers

et al. 2020

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We present results from a systematic investigation of environmental effects on the frictional behavior of Au-Ni multilayer films of varying interlayer spacing. The current results, sliding against ruby spheres in a dry N 2 atmosphere, are compared to prior work on the tribological behavior of these materials under ultra-high vacuum (UHV) (Cihan et al. in Sci Rep 9:1-10, 2019). Under both conditions, there is a regime of high friction when the interlayer spacing is large and a regime of low friction when the spacing is small. The low friction regime is associated with a critical grain size below which grain boundary sliding is expected to be the dominant mechanism of deformation. A shear-induced alloy formation (60-65 at.% Ni in Au) and a concomitant low friction coefficient was observed with multilayer spacings of 20 nm and lower under UHV. A distinct microstructure was found in dry N 2 , and is attributed to different interfacial characteristics due to adsorbed species; rather than mixing between Au and Ni layers, only the uppermost Au layers were affected by shearing. These observations are coupled with the friction and wear behavior of multilayer samples sliding under different environments.

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Environmental effect on the load-dependent friction behavior of a diamond-like carbon film

Cited by 46 publications

References 34 publications

Is graphene formed on WC surface under glycerol lubrication? Yes

Is graphene formed on WC surface under glycerol lubrication? Yes

Perspectives of the Friction Mechanism of Hydrogenated Diamond-Like Carbon Film in Air by Varying Sliding Velocity

Effect of Environment on Microstructure Evolution and Friction of Au–Ni Multilayers

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