Improving the wear resistance of PTFE-based friction material used in ultrasonic motors by laser surface texturing

Zeng, Shuaishuai; Li, Jinbang; Zhou, Ningning; Zhang, Jiyang; Yu, Aibing; He, Huabo

doi:10.1016/j.triboint.2019.105910

Cited by 34 publications

(14 citation statements)

References 35 publications

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“…In addition to the observed effect on wear, textures rubbing against PTFE counter-bodies may also lower the COF (reduction on the order of 10%) [183,184] and improve the energy efficiency in ultrasonic motors (improvement by about 30%) [185,186]. These improvements were explained by the storage of lubricious wear debris in textures, thus reducing abrasion and adhesion due to the discontinuous contact area.…”

Section: Ptfe and Surface Texturesmentioning

confidence: 96%

“…Most of these employed hard textured substrates such as stainless steel [179][180][181][182][183], bronze [184][185][186], silicon [187] or laminated ceramics [188,189], which were rubbing against an untextured PTFE nano-composite. Surface textures were mainly produced by LST using lasers with pulse durations ranging from micro- [179,181,[184][185][186] and nano- [188,189] to pico- [182] and femtoseconds [180,187]. Regarding the geometry of the textures, research effort has focused on dimples [179, 181-183, 185, 186, 188, 189], unidirectional grooves [180], grid-like textures, and circumferentially or radially aligned grooves [184].…”

Section: Ptfe and Surface Texturesmentioning

confidence: 99%

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Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

Rosenkranz

Costa

Baykara

et al. 2021

Tribology International

314

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Surface texturing and solid lubricants have demonstrated the ability to substantially reduce friction and wear under dry conditions. In recent decades, these two technologies have been combined to leverage the advantages of both for superior tribological performance. This review article first summarizes the state-of-the-art regarding surface texturing and solid lubricants, including soft metals, polytetrafluoroethylene, diamond-like carbon and 2D layered materials. Then, the synergy between surface textures and solid lubricants is discussed, with particular emphasis on the underlying mechanisms. Finally, gaps in the existing understanding of these synergies are identified and opportunities for future research are suggested.

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Section: Ptfe and Surface Texturesmentioning

confidence: 96%

Section: Ptfe and Surface Texturesmentioning

confidence: 99%

Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

Rosenkranz

Costa

Baykara

et al. 2021

Tribology International

314

View full text Add to dashboard Cite

show abstract

“…In the friction process, mechanical energy can be converted into a part of friction heat and dissipated in the air through friction 38 . As the temperature increases, the composites surface deforms, which increases the friction coefficient and the friction force between the composites and the stainless steel.…”

Section: Resultsmentioning

confidence: 99%

Effect of nano fillers on the properties of polytetrafluoroethylene composites: Experimental and theoretical simulations

Xiao

2021

J of Applied Polymer Sci

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Polytetrafluoroethylene (PTFE) has excellent corrosion resistance and a low coefficient of friction; however, its high wear rate and low hardness severely limit its use. In the work, nano particles were used as fillers for PTFE. The composites were prepared by the homogeneous mixing of PTFE and other fillers and sintered at high temperatures. The work aimed to investigate the effect of various nano fillers (nanocarbon powders, graphene, fullerene, nano graphite powders, and nano copper powders) on the mechanical, thermal, and frictional properties of composites. The results of the experiments showed that the addition of graphene could improve the stress and strain values of the composites, and all the nano fillers could improve the thermal conductivity of the PTFE composites. The friction experiments showed that fullerenes could significantly improve the wear resistance of PTFE composites. In the theoretical simulation, the thermal conductivity of PTFE composites was predicted using ANSYS software, with the changes in the temperature and friction force in the friction process. The theoretical simulation results matched with the experimental values, which proved the accuracy of the theoretical simulations.

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“…Therefore, structures with parallel or cross-hatched grooves [7][8][9][10] were created. Textured surfaces with isolated dimples are also used [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Various fabrication techniques were used for surface texturing [33]. Laser texturing is the most widely used, because this method seems to be the most flexible and efficient [1,11,[13][14][15][34][35][36]. Abrasive jet machining can be an alternative to laser texturing [28,[37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Friction Reduction in Unidirectional Lubricated Sliding Due to Disc Surface Texturing

et al. 2020

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Surface texturing is an option of surface engineering resulting in reduction of friction due to the creation of isolated dimples or grooves on sliding surfaces. The purpose of this work is to find the effect of the groove bottom profiles on the reduction of the friction force. Investigations were conducted using an Optimol SRV5 tribotester equipped with a pin-on-disc module. A disc made of 42CrMo4 steel, with a 100 mm diameter acted as a sample. A counter-sample was made of the same material, however, its diameter was 20 mm. The sliding conditions were selected to be similar to those of a sliding crankpin bearing pad operating in a high-performance internal combustion engine. Surface texturing was found to be beneficial for a reduction in the friction coefficient up to 55% in comparison to the untextured disc. Tribological performances of discs with spiral groove patterns were better than those with a radial layout. In most cases the convergent profile of the groove bottom was superior to the dam shape.

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Improving the wear resistance of PTFE-based friction material used in ultrasonic motors by laser surface texturing

Cited by 34 publications

References 35 publications

Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

Effect of nano fillers on the properties of polytetrafluoroethylene composites: Experimental and theoretical simulations

Friction Reduction in Unidirectional Lubricated Sliding Due to Disc Surface Texturing

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