Tribo-mechanical properties of graphite/talc modified polymer composite bearing balls

Rathaur, Anand Singh; Patel, Vinay Kumar; Katiyar, Jitendra Kumar

doi:10.1088/2053-1591/ab58db

Cited by 14 publications

(4 citation statements)

References 19 publications

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“…Gautam et al 21 studied the slurry erosion wear behavior of brass alloy and they observed that an increase in impact velocity increased the erosion rate. Rathaur et al 22 reported the tribo-mechanical behavior of Gr/talc/epoxy modified polymer composites and understood that the wear and COF were reduced when addition of 10 wt.% filler content. Ayyappadas et al 23 developed Cu-graphene composites through PM technique and reported that the friction coefficient (COF) reduces with increment of graphene content.…”

Section: Introductionmentioning

confidence: 99%

Optimization of tribological process parameters of titanium carbide reinforced copper matrix composites

Ravichandran¹,

Alagarsamy²,

Dinakaran³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Copper (Cu) matrix composites are developed by reinforcing Cu with Titanium Carbide (TiC) powder using the powder metallurgy (PM) method. Pin-on-disc tribo analysis is conducted to evaluate the tribological performance of the developed composites. Moreover, the influence of different parameters such as, concentration (wt.%) of TiC, applied load, sliding velocity and sliding distance on the wear rate and friction coefficient are studied using Taguchi L16 orthogonal array. The main effect plot reveals that the lowest wear rate is obtained at 12 wt.% of TiC, 10 N applied load, 4 m/s sliding velocity and 1750 m sliding distance. Similarly, the lowest friction coefficient is attained at 12 wt.% of TiC, 10 N applied load, 4 m/s sliding velocity and 750 m sliding distance. Analysis of variance (ANOVA) results shows that the wt.% of TiC powder is a more noteworthy parameter for obtaining the lowest wear rate and friction coefficient with a contribution of 94.54% and 94.17%, respectively. A regression model is also developed to predict the friction coefficient and wear rate for the developed composites.

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Section: Introductionmentioning

confidence: 99%

Optimization of tribological process parameters of titanium carbide reinforced copper matrix composites

Ravichandran¹,

Alagarsamy²,

Dinakaran³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Therefore, exploring the techniques to maintain the effective lubricating film formation at the contacts in ball bearings is extremely vital. In the past, researchers have attempted to improve the tribological and dynamic performance behaviours of concentrated contacts mainly employing the additives (powders of polymers, MoS 2 , WS 2 , hBN etc) in the lubricants [1][2][3][4][5][6][7][8][9][10][11], coatings on balls and races [12][13][14][15][16], lighter ball materials [17][18][19][20][21], different cage designs and/ or cage materials [22][23][24][25][26][27], and material design [28]. It is observed that above-mentioned techniques could not be much useful in terms of retaining the lubricating oil/ grease at the concentrated contacts.…”

Section: Introductionmentioning

confidence: 99%

Experimental exploration for the performance improvement of a thrust ball bearing using circumferential micro-grooved races

Bhardwaj¹,

Pandey²,

Agarwal³

2021

Surf. Topogr.: Metrol. Prop.

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This paper presents the findings of an experimental study performed for exploring and improving the tribodynamic performance behaviours of a thrust ball bearing employing circumferential microgrooves on the stationary upper race. Investigations were conducted using oil and grease lubricants and operating the bearings at light loads (in the vicinity of requisite minimum loads characterised by p H =0.4 and 0.6 GPa) and speeds varying in the range of 1.8-4.0 m s −1 at the ambient condition. The effects of micro-grooved stationary races on frictional torque, temperature rise and vibrations of the bearings were measured and have been discussed herein. The surface topographies of races and balls of used test bearings were examined after finishing the experiments for extracting the surface topographies based technical information. Significant reductions in the magnitudes of frictional torque (14%-21%), bulk temperature rise of race (14%-26%), vibrations (7%-34%) were found with micro-grooved bearings (pair of conventional moving lower races and micro-grooved upper stationary races) in comparison to the conventional bearings (pair of conventional races). Moreover, the oil lubricated micro-grooved bearings yielded substantial improvement in the tribo-dynamics as compared to grease lubricated case irrespective of the operating parameters i.e. loads and speeds.

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“…Many researches have studied its wear mechanism [12][13][14][15]. When the hybrid PTFE/aramid fabric composites are working, the PTFE fibers in the fabric forms a lubrication film on the contact surface of the friction pair through plastic deformation and 'cold flow'.…”

Section: Introductionmentioning

confidence: 99%

Effects of PTFE coating modification on tribological properties of PTFE/aramid self-lubricating fabric composite

Wang

Huang²,

Wei³

et al. 2022

Mater. Res. Express

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Polytetrafluoroethylene (PTFE)/aramid fabric composites are currently widely used as self-lubricating bearing liners. In this study, a PTFE composite coating was performed to improve the friction stability of the PTFE/aramid fabric composite in long-term friction. Effects of the surface modification on the composite tribological properties were studied using ball-on-disk friction tests. Results showed that under different sliding condition, the friction coefficient of the modified and unmodified fabric composite were similar after sliding of 240 min. However, the friction coefficient curves of the unmodified fabric composite increased first, then decreased, and then increased, while that of the modified fabric composite increased first and then stabilized. At a sliding speed of 4.5 m/min and load of 50 N, the unmodified fabric composite worn out at ~200 min, but the modified fabric composite was still stable after 240 min. SEM results confirmed that the PTFE composite coating had a good film forming property, which improved the wear resistance and friction stability of the composite in long-term friction especially under high sliding speed. These results give a reference for the development of self-lubricating plain bearing liners with long lifespans.

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Tribo-mechanical properties of graphite/talc modified polymer composite bearing balls

Cited by 14 publications

References 19 publications

Optimization of tribological process parameters of titanium carbide reinforced copper matrix composites

Optimization of tribological process parameters of titanium carbide reinforced copper matrix composites

Experimental exploration for the performance improvement of a thrust ball bearing using circumferential micro-grooved races

Effects of PTFE coating modification on tribological properties of PTFE/aramid self-lubricating fabric composite

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