Wear properties of textured lubricant films filled with graphite and polytetrafluoroethylene (PTFE) via laser surface texturing (LST)

Wang, Hai; Sun, Annan; Qi, Xiaowen; Dong, Yu; Fan, Bin

doi:10.1016/j.triboint.2021.107414

Cited by 15 publications

(8 citation statements)

References 52 publications

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“…The results in Figure 5b show that the COF of the specimen filled with MoS 2 trended upwards in all three time periods, whereas that of the specimen filled with MoS 2 @ DA was relatively stable. Wang and Fu et al [5, 28] reported that the anti‐friction performance of a solid lubricant depends on the amount of solid lubrication retained in the surface microtexture. When the amount of retained solid lubricant is insufficient, it is difficult to form a solid film with sufficient thickness to isolate the sliding surface contacts.…”

Section: Resultsmentioning

confidence: 99%

Tribological characteristics of dimpled surfaces filled with dopamine‐modified MoS₂

Qin,

Yu,

Zhao

et al. 2023

Biosurface and Biotribology

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To improve the tribological characteristics of dimples on the surface of 45 steel, the dimples were filled with MoS2 and MoS2 modified by dopamine (MoS2 @ DA), and ball‐disk friction and wear tests were conducted. Specifically, the dimple filling gap, abrasion depth, and surface cross‐sectional area of 45 steel were measured. The wear morphology of the friction ball and exfoliation of MoS2 in the dimples and the bending characteristics of the specimens were studied. The surface friction coefficient of MoS2 @ DA‐filled specimen was 17.9% lower than MoS2‐filled specimen, and the dimple filling gap was 70.1% lower, the surface abrasion depth was 5.8% lower, and the abrasion cross‐sectional area was 17.7% smaller. Moreover, the bending strength of the MoS2 @ DA specimen was 3.27 times greater than that of the MoS2 specimen, and the exfoliation of MoS2 was slowed by filling with the MoS2 @ DA. Finally, the tribological characteristics were also superior for the specimens prepared with MoS2 @ DA.

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Section: Resultsmentioning

confidence: 99%

Tribological characteristics of dimpled surfaces filled with dopamine‐modified MoS₂

Qin,

Yu,

Zhao

et al. 2023

Biosurface and Biotribology

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“…The phosphating film, characterized by its special crystal grain structure, possesses a porous and rough surface morphology that contributes to the formation of a high-quality transfer film. This transfer film effectively reduces wear losses (Wang et al , 2022a, 2022b). Its formation primarily depends on the agglomeration of solid lubricant materials under the influence of three forces: friction force, van der Waals force and electrostatic force.…”

Section: Discussionmentioning

confidence: 99%

Effect of composite solid lubricant coatings on the tribological performance of thrust cylindrical roller bearings

Xu,

Zhang

2023

ILT

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Purpose This study aims to form composite solid lubricant coatings on the surface of bearing steel, which can significantly improve the tribological properties of thrust cylindrical roller bearings (TCRBs). Phosphating films possess microscopic porosity that typically needs to be sealed with oil, grease or wax. Due to its unique crystal structure, the phosphating film itself also exhibits a certain degree of lubricity. In this study, solid lubricants are used to fill the pores of the phosphating film. By combining the phosphating film with solid lubricants, lubrication and wear reduction can be achieved. Design/methodology/approach In this study, the surfaces of the shaft washer (WS) and seat washer (GS) were treated with zinc-phosphating. Subsequently, a solid lubricant solution (polytetrafluoroethylene [PTFE], MoS2 and graphite) was sprayed onto the phosphated samples at concentrations of 1 , 2 and 3 g/L. The porous and adsorptive nature of the phosphating film was used to embed the solid lubricant particles into the film, thus forming a composite lubrication layer containing solid lubricants on the surface of the bearing steel. Findings The addition of solid lubricant materials has shown significant potential in reducing wear losses compared with phosphated samples without such additives. Increasing the amount of solid lubricant added can facilitate the formation of a transfer film, which further enhances the protective properties. However, it is important to note that excessive amounts of solid lubricant material can contribute to seizure, leading to increased wear losses of the cage and a higher average coefficient of friction (ACOF).By spraying a PTFE solution with a concentration of 2 g/L, the lowest ACOF and cage wear loss were achieved, resulting in reductions of 60.5% for the ACOF and 89.4% for the cage wear loss. Similarly, when spraying a graphite solution with a concentration of 3 g/L, the lowest wear losses for GS and WS were observed, with reductions of 51.7% for GS wear loss and 38.9% for WS wear loss. Originality/value The combination of the phosphating film and solid lubricants aims to achieve lubrication and wear reduction, providing a new approach to wear-resistant technology for TCRBs. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2023-0231/

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“…By lling with PTFE and graphite as lubricants in LST microconcavities, the tribological performance of the friction pair was enhanced signicantly. 10,11 Additionally, the textile structures, weave density, we density, and yarn twist of fabric liners are important factors affecting the tribological performance of fabric liners and have also been extensively studied. [12][13][14] Results indicated a fabric liner with a satin 8/5 structure demonstrated the best antifriction and wear resistance due to the large PTFE proportions on the friction surface.…”

Section: Introductionmentioning

confidence: 99%

“…By filling with PTFE and graphite as lubricants in LST microconcavities, the tribological performance of the friction pair was enhanced significantly. 10,11…”

Section: Introductionmentioning

confidence: 99%

Influence of sliding orientation on tribological properties of hybrid PTFE/Kevlar fabric composites

et al. 2023

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Wear properties of textured lubricant films filled with graphite and polytetrafluoroethylene (PTFE) via laser surface texturing (LST)

Cited by 15 publications

References 52 publications

Tribological characteristics of dimpled surfaces filled with dopamine‐modified MoS₂

Tribological characteristics of dimpled surfaces filled with dopamine‐modified MoS₂

Effect of composite solid lubricant coatings on the tribological performance of thrust cylindrical roller bearings

Influence of sliding orientation on tribological properties of hybrid PTFE/Kevlar fabric composites

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Wear properties of textured lubricant films filled with graphite and polytetrafluoroethylene (PTFE) via laser surface texturing (LST)

Cited by 15 publications

References 52 publications

Tribological characteristics of dimpled surfaces filled with dopamine‐modified MoS2

Tribological characteristics of dimpled surfaces filled with dopamine‐modified MoS2

Effect of composite solid lubricant coatings on the tribological performance of thrust cylindrical roller bearings

Influence of sliding orientation on tribological properties of hybrid PTFE/Kevlar fabric composites

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Tribological characteristics of dimpled surfaces filled with dopamine‐modified MoS₂

Tribological characteristics of dimpled surfaces filled with dopamine‐modified MoS₂