Wear of hybrid radial bearings (PEEK ring-PTFE retainer and alumina balls) under dry rolling contact

Koike, Hitonobu; Kida, Katsuyuki; Mizobe, Koshiro; Shi, Xiaochen; Oyama, Shunsuke; Kashima, Yuji

doi:10.1016/j.triboint.2015.04.007

Cited by 40 publications

(24 citation statements)

References 18 publications

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“…The results of the dry-sliding tribological tests, hardness measurements, and X-ray diffraction (XRD) analyses show that the processing temperature greatly influences the hardness and the crystallinity of PEEK, which in turn affects the tribological behavior. Koike et al [14] investigated the wear of the PEEK radial ball bearing composed of a PEEK ring, a PTFE composite retainer, and alumina balls. They found that the PEEK-PTFE adhesion film dramatically improved the wear and rotational performance of the bearing.…”

Section: Introductionmentioning

confidence: 99%

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

et al. 2017

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Polyether-ether-ketone (PEEK) and polyimide (PI) are two kinds of engineering polymer materials widely used as roller bearing cages and rings under extreme environment because of their noise reduction and corrosion resistance properties. The Si 3 N 4 ceramic is the most common ball bearing material. Many current engineering applications of ball bearings require aqueous lubrication. Therefore, this study presents the aqueous lubrication of tribopairs formed by PEEK and PI material sliding against Si 3 N 4 ceramic. Experimental results show that two tribopairs exhibited the similar tribological properties under the dry condition. Water as a lubricant for the PI-Si 3 N 4 tribopair pairs effectively reduces both friction coefficients by 35.5% and wear rates by 32%. The water absorption of PI induces better tribological properties by changing the tribopair surface properties. In addition, the dimples appearing on the PI tribopair surface under water generate additional hydrodynamic lubrication and further improve the friction properties of surface. The PEEK-Si 3 N 4 tribopair shows similar friction coefficients under two kinds of environments. The wear rates under water are approximately more than two times of that under dry sliding. However, water inhibits the appearance of the crush phenomenon and enhances the carrying capacity of the tribopair. Energy dispersive spectroscopy and X-ray diffraction spectra demonstrate no chemical corrosion. The 3D profiler and SEM morphologies illustrate that the transfer film would be formed from the surface of PEEK under water but hindered under dry friction. Overall, the PI-Si 3 N 4 tribopair exhibits better properties than PEEK under water and is promising for future applications in the bearing industry.

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Section: Introductionmentioning

confidence: 99%

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

et al. 2017

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“…The test conditions of radial load and rotation speed were 90-360 N and 1200 rpm, respectively. They were the same as our previous works [9,14]. This is because the present tests were done in order to focus on the details of the fatigue fracture origin/propagation of the one-point RCF test.…”

Section: One-point Rolling Contact Fatigue Testmentioning

confidence: 99%

Flaking of PEEK under one-point rolling contact fatigue using Al₂O₃ ball

et al. 2019

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The growth of flaking as tribological fatigue failure in PEEK was investigated through the one-point type rolling contact fatigue test between a machined PEEK polymer shaft and an alumina bearing's ball. Due to Hertzian contact of cyclic compressive stress, the subsurface fatigue cracks in the PEEK shaft propagated in rolling and axial directions. When the rolling fatigue life of the PEEK shaft reached 106 fatigue cycles, many narrow angled cracks occurred in the near-surface of the rolling track without flaking. On the other hand, when the flaking ocuurred on the PEEK shaft before 106 fatigue cycles, semicircular surface and subsurface crack propagations were observed. From these observations, it was found that micro-flaking occurred due to the linkages between subsurface and surface cracks. Flakingdeveloped due to the accumulation of these micro-flakings.

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“…The RCF tests of PEEK-PTFE radial bearings were done using the RCF test machine which was developed by Kida's group [1][2][3][4]6]. Figure 3 shows a schematic illustration of the RCF testing machine.…”

Section: Rolling Contact Fatigue (Rcf) Testmentioning

confidence: 99%

“…PEEK (Poly-Ether-Ether-Ketone) and PTFE (Poly-Tetra-Fluoro-Ethylene) have good mechanical features such as heat and corrosion resistance. In our previous studies on PEEK radial bearings [1][2][3][4], the effect of radial load on bearing life in dry conditions was investigated. Mizobe et al found that the wear resistance of the PEEK hybrid thrust bearing with a PTFE retainer was superior to that without the PTFE retainer [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of groove shape on rolling contact fatigue of PEEK-PTFE hybrid radial bearings in dry conditions

et al. 2019

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In this study, rolling contact fatigue (RCF) tests were performed in order to investigate the effect of groove radius on the life of PEEK-PTFE hybrid radial bearings. Furthermore, solid state NMR spectroscopy was performed in order to investigate the molecular structure of PEEK. It was found that groove radius shape was related to limitations of the bearings, and the molecular structure of the PEEK was not changed by the temperature rise in this test. Furthermore, thermal failure of the PEEK was not affected by oxidation during RCF test.

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Wear of hybrid radial bearings (PEEK ring-PTFE retainer and alumina balls) under dry rolling contact

Cited by 40 publications

References 18 publications

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

Flaking of PEEK under one-point rolling contact fatigue using Al₂O₃ ball

Influence of groove shape on rolling contact fatigue of PEEK-PTFE hybrid radial bearings in dry conditions

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Wear of hybrid radial bearings (PEEK ring-PTFE retainer and alumina balls) under dry rolling contact

Cited by 40 publications

References 18 publications

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

Flaking of PEEK under one-point rolling contact fatigue using Al2O3 ball

Influence of groove shape on rolling contact fatigue of PEEK-PTFE hybrid radial bearings in dry conditions

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Flaking of PEEK under one-point rolling contact fatigue using Al₂O₃ ball