Tribological Properties of Nano-ZrO2 and PEEK Reinforced PTFE Composites Based on Molecular Dynamics

Qi, Yuan; Sun, Bugong; Zhang, Yang; Gao, Guanzhen; Zhang, Peng; Zheng, Xiaobao

doi:10.3390/lubricants11050194

Cited by 7 publications

(5 citation statements)

References 32 publications

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“…This material is also widely used as a base material for the production of composite materials [54][55][56]. However, a series of studies aimed at analyzing the influence of the percentages of the base and reinforcing elements on the final properties of the materials are necessary to produce high-quality composites.…”

Section: Discussionmentioning

confidence: 99%

“…However, a series of studies aimed at analyzing the influence of the percentages of the base and reinforcing elements on the final properties of the materials are necessary to produce high-quality composites. Thus, experiments are conducted to identify specific changes in the behavior of the composite at different concentrations of the PTFE base [54,56] and other materials [41]. PTFE is formed in different ways to obtain composites with different degrees of stiffness [55].…”

Section: Discussionmentioning

confidence: 99%

“…The concentration of moisture and oxygen in the air can affect the deformation behavior and, consequently, the friction and wear [60]. So, a study on friction properties was carried out by [56], where an attempt was made to increase the wear resistance of PTFE with the help of various modifications. However, the use of PTFE as a protective covering shows an increase in strength and other characteristics [53].…”

Section: Discussionmentioning

confidence: 99%

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The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Bogdanova,

Kamenskikh,

Nosov

2023

Designs

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Polymers have gained a foothold in the international market and are actively utilized at a large scale in various industries. They are used as sliding layers in various types of friction units. However, there is a lack of research on their deformation behavior under different design conditions. This work is focused on studying the influence of the geometrical design of lubrication recesses in a polymer sliding layer operating under conditions of frictional contact interaction. The article investigated an element of bridge-bearing steel plate with recesses for lubrication. Two geometrical configurations of recesses are studied: the annular groove and spherical well in the engineering software package ANSYS Mechanical APDL. Polytetrafluoroethylene (PTFE) is considered an elastic-plastic sliding layer. A comparative analysis of two models with different geometrical configurations of cutouts for lubrication, with/without taking into account its volume in the recess, has been conducted. The article establishes that in the absence of lubrication in the recesses, large deformations of the polymer sliding layer occur. This effect negatively affects the structure as a whole. Changing the geometry of the recess for lubrication has the greatest effect on the intensity of plastic deformations. Its maximum level is lowered by almost ~60% when spherical notches are used for lubrication instead of grooves. The friction coefficient of the polymer has a great influence on the contact tangential stress. At the experimental coefficient of friction, it is lowered on average by ~85%. The friction coefficient of the lubricant has almost no effect on the deformation of the cell (<1%).

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Bogdanova,

Kamenskikh,

Nosov

2023

Designs

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“…Furthermore, a comparison between Figure 8a,c reveals that a flat GNS is more conducive to reducing the local pressure [66]. Similarly, the relative concentration distribution (i.e., number density distribution) is a method of analyzing the distribution of atoms/molecules in space; based on this analysis, it is straightforward to recognize the interaction of atoms/molecules between friction interfaces [67][68][69][70]. Qu et al simulated the friction process of PTFE before and after thermal-oxidative aging.…”

Section: Direct Observation Of Frictional Interfacesmentioning

confidence: 99%

Molecular Dynamics Simulation on Polymer Tribology: A Review

Yin,

Wang,

Guo

et al. 2024

Lubricants

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A profound comprehension of friction and wear mechanisms is essential for the design and development of high-performance polymeric materials for tribological application. However, it is difficult to deeply investigate the polymer friction process in situ at the micro/mesoscopic scale by traditional research methods. In recent years, molecular dynamics (MD) simulation, as an emerging research method, has attracted more and more attention in the field of polymer tribology due to its ability to show the physicochemical evolution between the contact interfaces at the atomic scale. Herein, we review the applications of MD in recent studies of polymer tribology and their research focuses (e.g., tribological properties, distribution and conformation of polymer chains, interfacial interaction, frictional heat, and tribochemical reactions) across three perspectives: all-atom MD, reactive MD, and coarse-grained MD. Additionally, we summarize the current challenges encountered by MD simulation in polymer tribology research and present recommendations accordingly, aiming to provide several insights for researchers in related fields.

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“…In terms of filling modification, researchers have conducted a lot of exploratory works, wherein they are mostly filled and modified with organic particles, inorganic particles, polymer, etc. [7][8][9][10][11]. Krick et al [12] demonstrate that the addition of iron-cobalt (FeCo) microparticles could increase the wear resistance of PTFE composites due to their tribochemical mechanisms as compared to the elemental Fe-or Co-filled composites.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Friction and Wear Behavior of PTFE/MoS2 Composites

et al. 2023

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High performance polymer matrix composites with low friction and wear rate are of urgent requirement in sliding bearings and gaskets. In this study, the PTFE/MoS2 composites were prepared and the effect of testing temperature on the tribological properties were investigated. Results show that the friction coefficient and wear rate are approximately (0.14–0.19) and (4.18–13.38 × 10−4 mm3/Nm) at testing temperatures from 25 to 250 °C, respectively. At testing temperatures above 200 °C, the coefficient of friction of the composite with the addition of MoS2 is lower than that of pure PTFE, while the wear rate of the composite material with the addition of 2 wt.% and 5 wt.% MoS2 is lower than that of pure PTFE at temperatures above 150 °C. At low testing temperatures (25–100 °C), the main wear mechanism is that of slight abrasive wear, while from 150 °C to 250 °C, the main wear mechanism transformed to fatigue and severe abrasive wear.

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Tribological Properties of Nano-ZrO2 and PEEK Reinforced PTFE Composites Based on Molecular Dynamics

Cited by 7 publications

References 32 publications

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

The Geometric Configuration of Lubricant Recesses of the Polymer Sliding Layer of the Bearing

Molecular Dynamics Simulation on Polymer Tribology: A Review

High Temperature Friction and Wear Behavior of PTFE/MoS2 Composites

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