Friction and Wear Behaviors of Kevlar/Polytetrafluoroethylene Braided Composite in Oscillatory Contacts

Liu, Jian; Lu, Fei; Du, Shanyi; Pang, Xianjuan; Zhang, Yongzhen

doi:10.1007/s11665-020-04759-0

Cited by 16 publications

(10 citation statements)

References 18 publications

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“…Nomex/PTFE fiber reinforced composite is used as the ideal self-lubricating material in spherical plain bearing used in aviation and high-speed rail, etc, due to its high strength, low friction coefficient and stable lubrication properties [1][2][3][4][5][6]. For the material, the friction and wear performance and serving life directly determine the performance and service life of the spherical plain bearing [7,8].…”

Section: Introductionmentioning

confidence: 99%

Wear mechanism of Nomex/PTFE fiber reinforced composites

Jian

Tiantian

et al. 2022

Mater. Res. Express

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This paper is aimed at the problems of abnormal tribological damage and fluctuation of tribological performance in the self-lubricating composite serving in heavy load spherical plain bearing in aerospace field. The Nomex/PTFE fiber reinforced composite was used to carry out a reciprocating block on ring tribological test, investigating the tribological performance of the material and its wear evolution. Results show that the influence of oscillating frequency on material wear is obviously higher than that of load under high load condition (more than 90 MPa or 180 kN). Under a certain load and frequency condition, friction temperature is a key factor to affect wear behavior of the material. Friction heat plays a dominant role in the process of worn out failure of the material. Too high friction temperature greatly weakens the friction and wear performance, resulting in material failure in a short time. Thermal fatigue is the main tribological damage mode of the material under the high load and high frequency condition, with local worn out occurred. This finding was also verified by SEM analysis of the worn surface and wear debris.

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Section: Introductionmentioning

confidence: 99%

Wear mechanism of Nomex/PTFE fiber reinforced composites

Jian

Tiantian

et al. 2022

Mater. Res. Express

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“…Aramid, glass, or carbon fibers are usually woven with PTFE fibers as reinforcement to fabricate hybrid fabric composites [4,5]. Recently, hybrid PTFE/ aramid fabric composites, which are prepared with PTFE fibers, aramid fibers and matrix resin, are one of the most popularly selflubricating bearing liner materials in industries such as electric power, aerospace, and etc [6][7][8][9].…”

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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“…Hybrid PTFE fabric composites are commonly used materials for self-lubricating joint bearings and are widely applicable in various industries, including electrical power and aerospace (Myshkin and Kovalev, 2018;Evans, 1981). Aramid fibers have excellent mechanical properties, such as tensile strength, bending strength and impact resistance, and are usually woven with PTFE fibers as reinforcement or adhesion to improve the wear resistance of fabric composites (Liu et al, 2020;Gu et al, 2018;Li et al, 2016;Gu et al, 2016). The insolubility of the phenyl groups reduces the bonding performance of aramid fibers and their composites.…”

Section: Introductionmentioning

confidence: 99%

Tribological behavior and film-forming mechanism of a polytetrafluoroethylene/polyester fabric composite

Wang

Huang²,

Wang³

et al. 2022

ILT

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Purpose The purpose of this study is to determine the tribological behavior and wear mechanism of a polytetrafluoroethylene (PTFE)/polyester (PET) fabric composite for application as a self-lubricating liner suitable for high-speed and low-load friction conditions. Design/methodology/approach The effects of different loads and sliding speeds on the friction coefficients and wear characteristics of the composite were studied using reciprocating friction tests. Scanning electron microscopy, extended depth-of-field microscopy, and energy-dispersive X-ray spectrometry was used to analyze the worn surface morphology, wear depth and elemental content of the lubrication films, respectively. Findings The friction coefficient curves of the composites presented a long-term steady wear stage under different sliding conditions. With increasing sliding speed, the friction coefficient and wear depth of the composite slowly increased. The film-forming mechanism of the composite revealed that the PTFE/PET ply yarn on the composite surface formed complete PTFE lubrication films at the initial sliding stage. Originality/value The PTFE/PET fabric composite maintained good friction stability and high-speed adaptability, which demonstrates that the composite has broad application prospects as a highly reliable self-lubricating bearing liner with a long lifespan.

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Friction and Wear Behaviors of Kevlar/Polytetrafluoroethylene Braided Composite in Oscillatory Contacts

Cited by 16 publications

References 18 publications

Wear mechanism of Nomex/PTFE fiber reinforced composites

Wear mechanism of Nomex/PTFE fiber reinforced composites

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

Tribological behavior and film-forming mechanism of a polytetrafluoroethylene/polyester fabric composite

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