Rolling contact fatigue life of AISI 52100 steel balls with mineral and synthetic polyester lubricants with PTFE nanoparticle powder as an additive

Rico, E. Fernández; Minondo, I.; Cuervo, Diego García

doi:10.1016/j.wear.2008.08.020

Cited by 32 publications

(21 citation statements)

References 10 publications

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“…An additional study [69] by the same authors as the above reference reported rolling contact fatigue life of mineral oil and synthetic polyester oil with the addition of PTFE nanoparticles. Both oils had identical viscosities (9 cSt at 100 C) and contained no additives other than the PTFE.…”

Section: Literature Studies Of Low-viscosity Oil With Ptfe Additionmentioning

confidence: 90%

Applications of Fluorinated Additives for Lubricants

Ebnesajjad

Morgan²

2012

Fluoropolymer Additives

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Section: Literature Studies Of Low-viscosity Oil With Ptfe Additionmentioning

confidence: 90%

Applications of Fluorinated Additives for Lubricants

Ebnesajjad

Morgan²

2012

Fluoropolymer Additives

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“…Effects of different concentrations of nano‐Cu additives on contact fatigue properties of GCr 15 steel friction pairs were evaluated on ball‐rod contact fatigue tester and improvements fatigue life reported . Rolling contact fatigue life of AISI 52100 steel bearing balls with mineral and synthetic oil with and without PTFE nanoadditive was studied using Four‐ball tester and improvement in fatigue life reported . The rolling contact fatigue (RCF) performances of the steel‐to‐steel pairs lubricated by two‐phase liquid lubricants with nano‐grade powders of diamond studied and observed that L10 life increased 13.85 times with 3.0% and effect of viscosity on fatigue life reported…”

Section: Introductionmentioning

confidence: 99%

“…[26] Rolling contact fatigue life of AISI 52100 steel bearing balls with mineral and synthetic oil with and without PTFE nanoadditive was studied using Four-ball tester and improvement in fatigue life reported. [27] The rolling contact fatigue (RCF) performances of the steel-to-steel pairs lubricated by two-phase liquid lubricants with nano-grade powders of diamond studied and observed that L10 life increased 13.85 times with 3.0% and effect of viscosity on fatigue life reported. [28] On the basis of literature survey carried out, it is observed that people have studied tribological behavior of Cu nano-fluids extensively and reported Cu nano-particle having good anti-wear properties.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Rheological Parameters of Lubricants and Contact Fatigue Behavior of Steel in the Presence of Cu Nano‐Particles

Thapliyal

Kumar

Jain

2017

Macromolecular Symposia

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Rheological properties of lubricants determine their flow behavior. Rheological parameters like viscosity index (VI), dynamic viscosity, shear stress and strain rate are influenced by dispersing Cu nanoparticles in them. This not only enhances the rheological properties of the lubricants, influences the contact fatigue behavior of steel also due to improved adhesive properties. Synthesis of new materials and additives is a technological marvel of Modern Tribo Chemistry that helps enhance the physicochemical and rheological properties of the lubricants and also enhances the contact fatigue behavior of materials. In order to study the effect of Cu nanoparticles on the rheological properties of lubricants two commercially available blended lubricants were selected as base oils with synthetic engine oils of SAE grades 5W40. They were dispersed with 0.2% of nano‐Cu by weight. Physicochemical properties of oils were determined using standard ASTM and IS procedures. The experimental investigations were performed on four‐ball sliding contact geometry to assess the anti‐friction and anti‐wear behavior. Rheological parameters were evaluated using rheometerPhysica MCR 301 from Anton‐Paar Austria. Contact fatigue tests were also conducted on four ball fatigue tester using standard ASTM procedure. A significant reduction in friction and wear to the order of less than 13% has been observed for the 0.2 wt% of Cu nano‐particles showing enhanced tribological performance of the base oils. Cu nanofluids form boundary films on the metal surfaces which help enhance the tribo performance by reducing friction and wear as confirmed by The SEM and EDX analysis. Also the surface topography of the worn out of used test specimens revealed smooth sliding wear against the severe wear by the base oils. Rheological data reveal that tested Cu nano‐fluids behaved as non‐ Newtonian at low shear rates at all temperatures and at higher shear rates behaved as Newtonian fluids. On plotting the Weibull curves and survival probability curves it was observed that the nano lubricants showed much improved rolling contact fatigue life with an enhancement of L10 life from 16 to 61% and L90 life from 18 to 118%. Characteristic life also showed an improvement upto 117.6%. Moreover survival probability of rolling contacts also showed an improvement in the presence of nano‐Cu particles.

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“…These unique characteristics have made PTFE a candidate in many widespread applications, such as in electronics,8 mechanical engineering,9 fuel cells,10 aerospace,11 chemical industries,12 medical engineering,13 food industry,14 and so on 15–17. The newest industrial applications of PTFE are its use as a matrix for polymer composites with a range of fillers as material coating,18, 19 superhydrophobic electrosprayed nanomaterials,20 and electrolyte membranes 21. These all reveal the industrial applications of PTFE and the importance of the applicable methods for the synthesis of PTFE.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, nanometer‐sized PTFE particles have attracted much attention 20, 32. This is due to the unique physicochemical properties of PTFE nanoparticles 18, 32. Because the nanosize PTFE has some exceptional properties, such as excellent electrical resistance, chemical inertness, and mechanical and thermal stability, compared to bulky PTFE particles, PTFE nanoparticles play important roles in different parts of industry 20, 32.…”

Section: Introductionmentioning

confidence: 99%

Comparative investigation of the formation of polytetrafluoroethylene nanoparticles on different solid substrates through the adsorption of tetrafluoroethylene

Garshasbi

Doroodmand

Pooladi

et al. 2011

J of Applied Polymer Sci

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ABSTRACT:The effects of different solid substrates, including carbon nanofibers (CNFs), activated carbon, alumina, silica, molecular sieves, and poly(N-vinylpyrrolidione) (PVP), were compared for the high-pressure synthesis of polytetrafluoroethylene [PTFE or (CF 2 ) n ] nanoparticles via the adsorption of thermally synthesized tetrafluoroethylene (C 2 F 4 ) as the monomer. Scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis (TGA) were used for the characterization of the PTFE nanoparticles on different solid substrates. The results demonstrate that the average diameters of the PTFE nanoparticles were about 90 nm for the CNFs, 130 nm for PVP, 150 nm for alumina, and about 200 nm for silica. Also, TGA showed that the amounts of PTFE nanoparticles synthesized on each solid substrate were 3.53 6 0.09% for CNFs, 2.31 6 0.10% for PVP, 2.11 6 0.12% for silica, and 0.97 6 0.16% for alumina. Depending on the active surface area and the morphology of nanomaterials, such as CNFs, different capacities were evaluated for each solid support in the formation of the PTFE nanoparticles. The quantities and the size of the synthesized PTFE nanoparticles relied on the characteristics of the solid substrate.

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Rolling contact fatigue life of AISI 52100 steel balls with mineral and synthetic polyester lubricants with PTFE nanoparticle powder as an additive

Cited by 32 publications

References 10 publications

Applications of Fluorinated Additives for Lubricants

Applications of Fluorinated Additives for Lubricants

Investigation of Rheological Parameters of Lubricants and Contact Fatigue Behavior of Steel in the Presence of Cu Nano‐Particles

Comparative investigation of the formation of polytetrafluoroethylene nanoparticles on different solid substrates through the adsorption of tetrafluoroethylene

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