Tribological Properties of Spherical Plain Bearings with Self-Lubricating PTFE Woven Liners

The friction and wear behaviors of three kinds of spherical plain bearings with PTFE fabric composite liners were investigated by a high oscillating frequency and heavy load tribo-tester. Dry sliding tests were carried out at different oscillating frequencies. With the help of SEM and EDS, the differences of worn surfaces of the three spherical bearings were investigated. The results indicate that the fiber woven with PTFE effects the friction and wear characteristics of bearing, the tribological properties of bearing with Kevlar/PTFE fiber woven liner is the best in the three kinds of bearing. The abrasive wear are appeared on the surface of wore liners of bearingⅠ,while bearingⅡappeared normal wear, bearing III showed serious adhesive wear and abrasive wear.

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Friction and Wear Characteristics of 18Ni(300) Maraging Steel under High-Speed Dry Sliding Conditions

Materials ◽

10.3390/ma13071485 ◽

2020 ◽

Vol 13 (7) ◽

pp. 1485

Author(s):

Kun Sun ◽

Weixiang Peng ◽

Binghui Wei ◽

Longlong Yang ◽

Liang Fang

Keyword(s):

Maraging Steel ◽

High Speed ◽

Friction And Wear ◽

Adhesive Wear ◽

Dry Sliding ◽

X Ray Diffraction ◽

X Ray ◽

Friction And Wear Characteristics ◽

Increasing Load ◽

Worn Surfaces

18Ni(300) maraging steel, which has exceptional strength and toughness, is used in the field of aviation and aerospace. In this paper, using a high-speed tribo-tester, tribological behaviors of 18Ni(300) maraging steel were investigated under high-speed dry sliding conditions. Morphology of the worn surfaces and the debris was analyzed by scanning electron microscope, and the oxides of worn surfaces caused by friction heat were detected by X-ray diffraction. The experiment results reveal that the friction coefficient of frictional pairs declines with increasing load and speed. With the speed and load increasing, oxides of the worn surfaces of 18Ni(300) maraging steel change from FeO to Fe3O4 and the wear mechanism converts from adhesive wear into severe oxidative or extrusion wear.

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Friction and Wear Characteristics of Spherical Plain Bearings with PTFE Woven Liners

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.199-200.763 ◽

2011 ◽

Vol 199-200 ◽

pp. 763-766 ◽

Cited By ~ 1

Author(s):

Ming Qiu ◽

Zhi Lun Gao ◽

Guo Feng Wang ◽

Long Chen

Keyword(s):

Friction And Wear ◽

Dry Sliding ◽

Wear Depth ◽

Heavy Load ◽

Comprehensive Performance ◽

Increasing Trend ◽

Friction Temperature ◽

Spherical Plain Bearing ◽

Friction And Wear Characteristics

The friction and wear behaviors of three kinds of spherical plain bearings with PTFE woven liners were investigated by a high oscillating frequency and heavy load tribo-tester. Dry sliding tests were carried out at an oscillating frequency of 1.2Hz and four different loads. With the help of SEM and EDS, the differences of worn surfaces of the three kinds were investigated. The results indicate that the wear depth and friction temperature for the three kinds of bearings show increasing trend with the increasing of load, while the friction coefficient is the opposite. The comprehensive performance of bearing II is the best in the whole course of experiment, while the bearing III is the worst. The adhesive and abrasive wear mechanisms are appeared on the surface of liners. The quality of boning influences the tribological property of the spherical plain bearing.

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Friction and Wear Characteristics of UD Thermoplastic Tape Based Nanocomposites with Fullerene Soot

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.822.215 ◽

2019 ◽

Vol 822 ◽

pp. 215-223

Author(s):

Ilya Kobykhno ◽

Dmytro Honcharenko ◽

Hong Yu Li ◽

Alexey Leonidovich Steshenkov ◽

Jin Bao Xu ◽

...

Keyword(s):

Mechanical Properties ◽

Wear Rate ◽

Carbon Fibers ◽

Tribological Properties ◽

Friction And Wear ◽

Plate Test ◽

Wear Characteristics ◽

Fullerene Soot ◽

Friction And Wear Characteristics

A series of unidirectional thermoplastic tapes (UD tapes) specimens based on carbon fibers and polyamide filled with fullerene soot in a concentration of up to 4 wt. % was made. A study of the tribological properties by the 3 Ball on Plate test and Ring on Plate test and was made. Shown that the introduction of fullerene soot up to 2 wt. % decreases scatter of CoF in both ranges of load and velocity. Also, this concentration decreases wear rate almost 2.5 times compare to unfilled specimen. Mechanism of friction and wear was suggested. The obtained tribological results are well consistent with mechanical properties, and agree with previously suggested theory of the effect of fullerene soot on adhesion between polymer and fibers.

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