Tribological Behavior of Nano-ZrO2 Reinforced PTFE-PPS Composites

Cao, Wei; Gong, Jinwu; Qi, Yuan; Yang, Dongya; Gao, Guanzhen; Wang, Honggang; Ren, Jin; Chen, Shengsheng

doi:10.1007/s11595-019-2083-1

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…The details of its parameters can be found in Ref. [26]. The material used for the O-ring was nitrile rubber, and according to Rivlin's phenomenological theory of rubber elasticity, a rubber material can be modeled as an isotropic and incompressible hyperelastic material.…”

Section: Materials Modelmentioning

confidence: 99%

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Investigation into the Influence of Parallel Offset Wear on Stirling Engine Piston Rod Oil-Free Lubrication Seal

et al. 2022

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The oil-free lubrication seal of a piston rod plays an important role in the application of a Stirling engine. Parallel offset in a piston rod ruins the symmetry of the seal and affects the sealing performance when the seal is worn. In this paper, based on a motion analysis and the finite element method, a three-dimensional model of the Cap-seal was established, and its performance was numerically and experimentally investigated. The results show that parallel offset of the piston rod increases the possibility of seal damage and has no obvious effect on leakage. Under high pressures and low pre-compression ratios, the Cap-seal shows a good sealing capability and exhibits a higher propensity for mechanical damage. A good agreement was obtained between the numerical and experimental results. This study offers guidelines regarding the design and application of oil-free lubrication seals for a Stirling piston rod.

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Section: Materials Modelmentioning

confidence: 99%

“…The wear coefficient values of nano-ZrO 2 -filled polytetrafluoroethylene used in this study were set between 4.2 × 10 −6 mm 3 /Nm and 11.2 × 10 −6 mm 3 /Nm, as shown in Ref. [26].…”

Section: Wear Analysismentioning

confidence: 99%

Investigation into the Influence of Parallel Offset Wear on Stirling Engine Piston Rod Oil-Free Lubrication Seal

et al. 2022

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“…Tribological investigations in the published literature have focused on the effects of various types of reinforcement, fiber orientation, low friction additives, degree of crystallinity, sliding speed, load and counter surface materials. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] The friction coefficient and wear rate are commonly presented, however often without any information about the underlying mechanisms or how these are affected by different fillers/loads/temperatures, and so on. In order to create a good understanding of the active wear mechanisms, one should strive towards utilizing suitable analysis techniques to their full potential.…”

Section: Introductionmentioning

confidence: 99%

Strategies for revealing deformation and wear mechanisms of polymer composites by combining scanning electron microscopy, energy dispersive x‐ray spectroscopy and cross‐section techniques—Exemplified by glass fiber reinforced poly‐phenylene‐sulphide

Holmgren,

Heinrichs Lindgren,

Kassman Rudolphi

et al. 2023

J of Applied Polymer Sci

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Polymers and polymer composites are frequently used in tribological applications. However, their use is often limited by excessive wear or plastic deformation, therefore research and development aiming to improve the materials is ongoing. Tribological evaluations of polymer composites often study the friction coefficient and wear rate for different types, sizes and amounts of fillers. But rarely are any mechanisms presented. Although polymer materials differ from metals, the techniques typically used for metal components, for example, scanning electron microscopy (SEM) and energy dispersive x‐ray spectroscopy (EDS), can be adapted to polymer materials, to achieve more informative SEM micrographs and EDS analyses. The aim of this article is to present useful analysis strategies, from sample preparation and selection of viewing angles, to selection of instrument settings and detector types. The strategies are exemplified by analysis of poly‐phenylene‐sulphide filled with glass fiber, evaluated against steel in a reciprocating ball‐on‐flat test set‐up. This article takes its starting point with the worn surfaces, and subsequently analyze them using SEM and EDS. A selection of cross section preparation techniques, analysis parameters and microscopy settings are presented and discussed. By combining these techniques and settings, the observation of a strongly modified surface layer, as well as sub‐surface plastic deformation and imbedded wear particles, is facilitated.

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“…Among them, multi-component inorganic nano-fillers are often used to improve the softening resistance of PTFE. ZrO 2 and Au nano-particles served as friction modifiers to reinforce the friction and wear properties of PTFE [11,12]. Recently, hexagonal boron nitride (h-BN) has also been a reliable candidate to be an inorganic filler with superior comprehensive performance for high-temperature applications [13].…”

Section: Introductionmentioning

confidence: 99%

Design of Novel POB/h-BN Co-Filled PTFE Composites with Enhanced Thermal–Mechanical Properties

et al. 2021

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Polytetrafluoroethylene (PTFE) is provided with excellent self-lubricating properties and corrosion resistance. However, the lower thermal resistance greatly limits its high-temperature applications. In the present work, two types of fillers with rigid organic polymers and submicron-sized inorganic hexagonal boron nitride (h-BN) were added to the PTFE matrix. The microstructure and thermal–mechanical properties of PTFE-based composites with different filler types or ratios were comparatively investigated. The results suggested that the polyphenyl ester (POB)/h-BN co-filled PTFE composites exhibited excellent thermal–mechanical properties compared with the polyimide (PI)/h-BN/PTFE materials at high temperature. The optimal ratios of POB and h-BN were 25 wt.% and 5 wt.%, respectively. The Vicat softening temperature of 25 wt.% POB/5 wt.% PI/PTFE composite increased by 41.3% compared to that of pure PTFE, which was due to the cross-linked reticulation structure with regularly distributed pores and higher crystallization degree. The storage modulus increased from 51.99 MPa to 685.76 MPa at 260 °C and reached 187.82 MPa at 320 °C. The uniform distribution of anisotropic orientation of the h-BN flakes showed an obvious pinning effect, and further improved the thermal–mechanical stability of POB/h-BN/PTFE composites.

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Tribological Behavior of Nano-ZrO2 Reinforced PTFE-PPS Composites

Cited by 7 publications

References 22 publications

Investigation into the Influence of Parallel Offset Wear on Stirling Engine Piston Rod Oil-Free Lubrication Seal

Investigation into the Influence of Parallel Offset Wear on Stirling Engine Piston Rod Oil-Free Lubrication Seal

Strategies for revealing deformation and wear mechanisms of polymer composites by combining scanning electron microscopy, energy dispersive x‐ray spectroscopy and cross‐section techniques—Exemplified by glass fiber reinforced poly‐phenylene‐sulphide

Design of Novel POB/h-BN Co-Filled PTFE Composites with Enhanced Thermal–Mechanical Properties

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