Tribological Behavior of Polytetrafluoroethylene under Unidirectional Rotation, Reciprocating Sliding, and Torsion Motion

Cao, Bo; Gao, Shang; Yao, Zhihua; Chen, Jieping; Chen, Feng; Chen, Hong jun

doi:10.1080/10402004.2016.1191102

Cited by 9 publications

(4 citation statements)

References 28 publications

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“…However, the transfer layer can hardly exist under RSM due to the reciprocating shear, resulting in a high COF and wear rate. On the basis of 3D profiles, 2D cross-sectional curves, and optical microscope images of these matrices and balls analyzed, it could be concluded that the main wear mechanism under RSM is slight abrasive wear and delamination, while that under USM is abrasive wear [22].…”

Section: Friction and Wear Of Dlc Coating And Ptfe Bulk Materialsmentioning

confidence: 98%

“…It is obvious that most of the research has only focused on the tribological performance of materials under a single RSM or USM. Whereas only a few researchers noticed the influence of the RSM and URM on friction and wear [19][20][21][22][23]. Although some researches have been carried out on the difference of RSM and USM, the investigations regard to the tribological difference of typical tribo-pairs under RSM and URM is seldom mentioned.…”

Section: Introductionmentioning

confidence: 99%

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A comparison of wear between unidirectional and reciprocating sliding motions under different applied loads and lubricants

Liu,

Li,

et al. 2023

Phys. Scr.

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Exploring the wear mechanisms of tribo-pairs is essential to reducing friction and wear. Although it has been known that the wear mechanisms between reciprocating sliding motion (RSM) and unidirectional sliding motion (USM) are different, the differences are seldom reported, which causes trouble for many researchers in selecting proper tribo-pairs or wear test methods. Herein, we systematically explore the effect of RSM and USM on the wear mechanism for several typical friction and lubricant materials, such as alloys, liquids, and solid lubricants. It is found that tribo-pairs suffer unstable sliding under RSM, and sliding speed as well as sliding direction change frequently, which makes it difficult to form a transfer layer or tribo-chemical reaction film, leading to high friction and abrasive wear for hard alloys and DLC coating. Additionally, the quasi-static stage under RSM, when lubricated with polyalphaolefin (PAO) 40, does not facilitate elastohydrodynamic (EHD) lubrication, which typically prevents wear. However, stable sliding under USM could lead to adhesive wear, increasing the friction coefficient for soft TC4 alloys. Although wear under RSM is generally higher than that under USM, increasing the applied load could diminish the wear difference for hard metals.

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Section: Friction and Wear Of Dlc Coating And Ptfe Bulk Materialsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A comparison of wear between unidirectional and reciprocating sliding motions under different applied loads and lubricants

Liu,

Li,

et al. 2023

Phys. Scr.

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“…Tribological behavior of a material is different in unidirectional sliding and reciprocating sliding [24][25][26]. Sudden transition in friction regime doesn't occur in case of unidirectional sliding whereas in case of reciprocating sliding, transition in friction regime takes place at the beginning of each stroke [25].…”

Section: Introductionmentioning

confidence: 99%

Self and Complementary Mating Of Carbon-Carbon and Carbon-Carbon-Silicon Carbide Composites in Reciprocating Tribo-Interactions

Kumar¹,

Srivastava²,

Kumar³

et al. 2022

Tribol. Ind.

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The counter-surface (CS) material during tribological interactions significantly affects the prevalent wear and friction mechanisms, and correspondingly tribological behaviour. Although disparate uni-phase (i.e., single constituent) counter-surface materials exhibit contrast tribological phenomena, the presence of multi-phase (i.e., multiple constituents) CS may further complex the tribological analysis. The complexity of tribo-system further increases in the presence of two multi-phase materials rubbing against each other. Thus, the present article aims to investigate the reciprocating sliding of carbon-carbon (C/C) and carbon-carbon-silicon carbide (C/C-SiC) composites in self and complementary mated pairs with variation of laminate orientation (i.e., normal and parallel orientation of laminates) and normal load. The results indicate that C

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“…In an actual system, the method used to evaluate the friction properties, sliding/rolling motion state, point/line/area contact state, reciprocation/rotation state, and other states, can be changed based on the state of the contact [19,20,21]. In most studies, experimental methods depend on contact conditions in situations similar to actual applications.…”

Section: Introductionmentioning

confidence: 99%

Design of a Tribotester Based on Non-Contact Displacement Measurements

Kim

Sung

2019

Micromachines

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A tribotester with an integrated load sensor based on a strain gauge is typically used to measure the friction coefficient generated by the contact-related sliding motion of two objects. Since the friction coefficient is obtained by dividing the measured friction force by the applied normal force, the normal and friction forces must be measured for accurate analysis. In this study, a tribotester was used to measure the displacement of a cantilever tip using the fiberoptic sensor in a non-contact method. The friction coefficient measurement using the fiberoptic sensor was proven to be valid by calibrating the tip displacement due to normal/friction forces after designing a basic structural cantilever tip based on experiments and simulation analyses. The results obtained by using the fiberoptic sensor-cantilever tip-based tribotester were compared with those obtained using commercial and/or custom-built tribotesters under the same conditions. By designing various shapes of cantilever tips and using simulation analysis, the calibrations of the normal/friction forces and tip displacement could be verified and the coupling effect was evaluated. The performance and reliability of the fiberoptic sensor-cantilever tip-based tribotester, which can be used to determine the normal/friction forces by non-contact displacement measurements without a strain gauge, were verified.

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Tribological Behavior of Polytetrafluoroethylene under Unidirectional Rotation, Reciprocating Sliding, and Torsion Motion

Cited by 9 publications

References 28 publications

A comparison of wear between unidirectional and reciprocating sliding motions under different applied loads and lubricants

A comparison of wear between unidirectional and reciprocating sliding motions under different applied loads and lubricants

Self and Complementary Mating Of Carbon-Carbon and Carbon-Carbon-Silicon Carbide Composites in Reciprocating Tribo-Interactions

Design of a Tribotester Based on Non-Contact Displacement Measurements

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