A comparative study of tribological and mechanical properties of composite polymer coatings on bearing steel

Rathaur, Anand Singh; Katiyar, Jitendra Kumar; Patel, Vinay Kumar; Bhaumik, Shubrajit; Sharma, Anuj Kumar

doi:10.1504/ijsurfse.2018.096744

Cited by 11 publications

(5 citation statements)

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“…Epoxy resin (EP) was known for its high adhesion on the metal substrate [1], corrosion resistance [2], however, low load bearing capacity [3] and low thermal stability [4] were the biggest challenges for its long-term application in wear and friction. Filler modification was a usual method to enhance the tribological properties of epoxy resin coatings [4][5][6][7][8]. The filler could increase the load carrying capacity of EP coatings so that the anti-wear performance of the coatings is significantly improved [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Shape influence on the tribological properties of hexagonal boron nitride nanoplates and nanospheres reinforced epoxy coating

Wu¹,

Zhao²,

Ci³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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Hexagonal boron nitride was known for its excellent lubricating capacity, however, the shape influence on the tribological properties of hexagonal boron nitride modified epoxy composite coatings was still a challenging requirement. Herein, the boron nitride nanoplates (BNNP) and nanospheres (BNNS) were modified by polydopamine to improve their dispersion in epoxy coatings and the shape influence of two nanoparticles on the tribological property was proved by the micro-morphologies of wear debris. When the mass content of polydopamine-modified BNNS was 0.25 wt. %, the friction-reduction and anti-wear effects were the best, and the coefficient of friction and wear rate was reduced by 13.75% and 60.77%, respectively, compared with the pure epoxy coating. The “ball effect” of BNNS provided rolling friction and the layer-structured debris exhibited good lubricating properties. The enhanced wear mechanism of BNNS provided wider potential application in the mechanical industry, automotive, aerospace, and infrastructure fields.

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Section: Introductionmentioning

confidence: 99%

Shape influence on the tribological properties of hexagonal boron nitride nanoplates and nanospheres reinforced epoxy coating

Wu¹,

Zhao²,

Ci³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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“…For all polymeric materials, SU-8 is a promising material for next generation 3D fabrication. It can also be used as a coating material in different applications, such as bearing steel [3]. Currently, silicon wafers are used for the fabrication of MEMS devices; however, they have several disadvantages, such as a low thermal stability, difficulty in 3D fabrication, and non-biocompatibility.…”

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical and tribological properties of SU-8/h-BN composite with SN150/perfluoropolyether filler

2019

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In this study, SU-8 and its composites are fabricated by blending 10 wt.% hexagonal boron nitride (h-BN) fillers with/without lubricants, such as 10 wt.% base oil (SN150) and 20 wt.% perfluoropolyether (PFPE). The thickness of SU-8 and its composites coating is fabricated in the range ~100-105 μm. Further, SU-8 and its composites are characterized by a 3D optical profilometer, atomic force microscopy, scanning electron microscopy, a thermal gravimetric analyzer, a goniometer, a hardness tester, and an optical microscope. Under a tribology test performed at different normal loads of 2, 4, and 6 N and at a constant sliding speed of 0.28 m/s, the reduction in the initial and steady-state coefficient of friction is obtained to be ~0.08 and ~0.098, respectively, in comparison to SU-8 (~0.42 and ~0.75), and the wear resistance is enhanced by more than 103 times that of pure SU-8. Moreover, the thermal stability is improved by ~80-120 °C , and the hardness and elastic modulus by ~3 and ~2 times that of pure SU-8, respectively. The SU-8 composite reinforced with 10 wt.% h-BN and 20 wt.% PFPE demonstrated the best thermo-mechanical and tribological properties with a nano-textured surface of high hydrophobicity.

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“…Hence, the researchers have shifted their attention towards some alternate methods so that consumption of lubricant can be reduced. The researchers fabricated a polymer composite coating using solid friction modifier or additives which possessed lower friction coefficient because of self-lubricating property of coating [4]. Now a days various polymers are available in market such as epoxy, PMMA, PTFE etc; out of them, the epoxy resin is selected for present investigation because of its better mechanical, thermal and tribological property over other polymers [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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

Rathaur

Patel

Katiyar

2019

Mater. Res. Express

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In this study, epoxy resin blended with graphite/talc micro fillers are used to fabricate the composite bearing balls of uniform diameter of 12.7 mm. These bearing balls were tested in four ball test rig for investigation of friction and wear. The fabricated composite bearing ball of composition graphite (10 wt%) /talc (10 wt%)/epoxy demonstrated a significant reduction by ∼63% in coefficient of friction and a moderate increment by ∼34% in wear resistance as compared to pure epoxy bearing ball under dry condition. Further, the compressive strength and hardness test were carried out on the composite bearing balls which revealed a reduction in compressive strength after adding the fillers but approximately similar compressive strength and a marginal improvement in hardness by ∼5% was exhibited by graphite (10 wt%)/talc (10 wt%) /epoxy composite bearing ball with respect to pure epoxy bearing ball. Hence, the fabricated polymer composite bearing balls can be implemented for low to moderate load bearing application with enough capability to eliminate the bulk lubrication requirements as in case of conventional metallic bearing balls.

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A comparative study of tribological and mechanical properties of composite polymer coatings on bearing steel

Cited by 11 publications

References 0 publications

Shape influence on the tribological properties of hexagonal boron nitride nanoplates and nanospheres reinforced epoxy coating

Shape influence on the tribological properties of hexagonal boron nitride nanoplates and nanospheres reinforced epoxy coating

Thermo-mechanical and tribological properties of SU-8/h-BN composite with SN150/perfluoropolyether filler

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

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