Effect of the type, size and concentration of solid lubricants on the tribological properties of the polymer PEEK

Zalaznik, M.; Kalin, Mitjan; Novak, Saša; Jakša, Gregor

doi:10.1016/j.wear.2016.06.013

Cited by 95 publications

(52 citation statements)

References 31 publications

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“…The PI and PEEK composites were prepared by means of hot‐press molding following the procedure given in refs. and . The designations and chemical compositions of these composites were listed in Table 1 .…”

Section: Methodsmentioning

confidence: 99%

“…It has been generally recognized that a high‐performance tribofilm can separate the direct rubbing of friction pairs and therefore reduce the friction and wear of polymeric materials. With respect to the sliding of polymer composites, tribofilm formation is a complex process governed by both tribophysical and chemical actions . Harris et al recently reported that when polytetrafluoroethylene (PTFE)/nano‐Al 2 O 3 composites was slid against 304 stainless steel, broken PTFE chains chelated to both the metal counterface and the alumina nanoparticles, which was deemed important for the generation of a stable lubricating tribofilm .…”

Section: Introductionmentioning

confidence: 99%

“…With respect to the tribofilms of the nano‐SiO 2 /SCF/EP composites, a glassy tribofilm consisting of silica, iron oxide and carbon (C)‐material was identified . It was inferred that tribosintering of wear products, i.e., released nanoparticles, tribo‐oxidation product, and remnant C‐material from the matrix, dominated the tribofilm formation . Zhang et al proposed that a possible easy‐to‐shear characteristic of the tribofilm could be responsible for the high tribological performance especially under high pv conditions .…”

Section: Introductionmentioning

confidence: 99%

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Ultralow Friction and Wear of Polymer Composites under Extreme Unlubricated Sliding Conditions

Zhang

Chang

et al. 2017

Adv Materials Inter

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Dependence of the tribological behaviors of polyimide‐ and polyetheretherketone‐based composites on pv (pressure × speed) factors is investigated in air ambience. It is demonstrated that the hybrid composites filled with nanosilica/carbon fibers/graphite exhibit ultralow friction and wear under extreme conditions. In particular, the friction coefficients of the hybrid nanocomposites at 40 MPa m s−1 are in the range of 0.03–0.04, which are even lower than those obtained with poly alpha olefin lubrication. Moreover, the friction coefficients are lower than those of carbon fibers reinforced polymer composites ever reported in literatures. In order to reveal the underlying mechanisms of ultralow friction and wear, tribochemistry and tribofilms' nanostructures are comprehensively analyzed. It is identified that chelation of polymeric molecular radicals with steel counterface occurs enhancing tribofilm's bonding strength. Striking orientation of the molecules of remnant polymer in tribofilm is indicative that the film exhibits an easy‐to‐shear characteristic under extreme pv conditions. Nanosilica released onto sliding interface and iron oxide particles abraded from the counterface are thereafter tribosintered into a compact layer, which accounts for the high load‐carrying capability of the tribofilm.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ultralow Friction and Wear of Polymer Composites under Extreme Unlubricated Sliding Conditions

Zhang

Chang

et al. 2017

Adv Materials Inter

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“…While there are many attempts to improve the tribological performance of PEEK from the material side, as in the case of PEEK composites with specific fillers [24][25][26][27][28][29], fluid lubrication has the potential to further reduce friction and wear of PEEK. Zhang et al [30] reported lubrication with diesel fuel decreased friction and wear of PEEK in a PEEK plate/steel ring sliding contact while observing the transfer film on steel counterparts.…”

Section: Introductionmentioning

confidence: 99%

Effect of Lubrication on Friction and Wear Properties of PEEK with Steel Counterparts

et al. 2019

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Poly-Ether-Ether-Ketone (PEEK) has been widely used for tribological applications with steel counterparts because of its superior mechanical and self-lubricating properties. Fluid lubrication has the potential to further improve the performance of PEEK/steel contacts but its effect has been shown to depend on the operating conditions. To elucidate these aspects and establish the mechanism of fluid lubrication, the friction and wear properties of the PEEK/steel contacts in both dry and poly-α-olefin (PAO) lubricated conditions were investigated by tribological tests and surface analytical techniques. The nanoindentation measurements showed that lubrication with PAO had a softening effect on the wear track of PEEK, but no correlation was established with the wear of PEEK. The tribological behavior, for both dry and lubricated contacts, was correlated with the thickness of PEEK transfer films on the steel counterparts. The thickness of these films, as determined by Electron Probe Micro Analysis (EPMA) and X-ray Photoelectron Spectroscopy (XPS), was controlled by the rates of their formation and removal and depended on the operating conditions. Moreover, lubrication with PAO inhibited not only the formation but also the removal of PEEK transfer films. This study thus sheds light on the mechanism of fluid lubrication of the PEEK/steel contacts.

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“…Even though the above research has made breakthrough progress to a certain extent, there is a very little attention given to finding the effect of solid lubricants with different hardness on the MRF friction performance. In the 1980s, friction workers have already used nano-particles as lubricant additives in oil to improve the anti-wear ability, and those methods have been verified in friction tester as well as engine bench testing machine [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of different hardness nanoparticles on friction properties of magnetorheological fluids

Zhao¹,

Zhang²,

Yao³

2017

AIP Conference Proceedings

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Effect of the type, size and concentration of solid lubricants on the tribological properties of the polymer PEEK

Cited by 95 publications

References 31 publications

Ultralow Friction and Wear of Polymer Composites under Extreme Unlubricated Sliding Conditions

Ultralow Friction and Wear of Polymer Composites under Extreme Unlubricated Sliding Conditions

Effect of Lubrication on Friction and Wear Properties of PEEK with Steel Counterparts

Effect of different hardness nanoparticles on friction properties of magnetorheological fluids

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