Analysis of Nanoscale Wear Particles from Lubricated Steel–Steel Contacts

Wäsche, Rolf; Härtelt, M.; Hodoroabă, Vasile-Dan

doi:10.1007/s11249-015-0534-1

Cited by 14 publications

(8 citation statements)

References 15 publications

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“…The thickness was found to be not more than 30 nm. Wasche et al [23] also analyzed wear particles formed in reciprocating lubricated steel-steel contact. As the lubricant, fully formulated and base oil were used.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Wear Particles Formed in Boundary-Lubricated Sliding Contacts

et al. 2016

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The wear process in a sliding contact results in generation of wear debris, which affects the system life. The impact depends on the wear particle properties, such as size, shape and number. In this paper, the wear particles formed during a cylinder-on-disk wear test were examined. PAO additive-free oil, steel-brass and steel-steel contact pairs were employed. A particle isolation procedure was applied, and SEM/EDS analysis was used to validate it. DLS measurements indicated the wear particles radius to be in the range from 230 to 260 nm for both materials under applied nominal pressures from 87 to 175 MPa. AFM data revealed the wear particles size to be in the range from 133 to 175 nm. A slight increase in particles size with load was observed by AFM for both materials and confirmed by DLS for steel samples. AFM measurements were taken to determine thickness, length and width distributions of the wear particles. The number of wear particles per sliding distance and per unit load was estimated to be in the range from 150 to 750 particles mm N for steel and approximately particles mm N for brass.

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Section: Introductionmentioning

confidence: 99%

Analysis of Wear Particles Formed in Boundary-Lubricated Sliding Contacts

et al. 2016

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“…The rolling mechanism of the nanoparticles between mating surfaces occurs only when harder nanoparticles passed over the embedded nanoparticles . Wäsche et al also reported that during sliding, secondary tiny particles are generated from the self‐wear of the top surface of the nanoparticles by micro‐shearing, which directly help in surface mending to achieve improved tribo‐performance.…”

Section: Resultsmentioning

confidence: 99%

Tribological evaluation of calcium‐copper‐titanate/cerium oxide‐based nanolubricants in sliding contact

Gupta

Harsha

2018

Lubrication Science

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In the present work, calcium-copper-titanate (≈85 nm) and cerium oxide (≈90 nm) nanoparticles were blended in paraffin oil (PO) as an additive by varying the concentration from 0.1 to 1.0% w/v, and tribo-performance was evaluated with four-ball tester. The concentration 0.25% w/v of the nanoparticles in PO was found to be optimum in antiwear and antifriction property tests for both types of nanolubricants. At this particular concentration, the maximum reductions in the wear scar diameter were 38.4 and 26.1% for calciumcopper-titanate and cerium oxide-based nanolubricants, respectively. Also, the mean coefficient of friction was reduced by 17.3 and 29.6% at this optimum concentration for both types of lubricants. For extreme-pressure test, the loadcarrying capacity of the nanolubricants was improved from 126 to 160 kgf as compared with base PO. The worn surfaces were examined with scanning electron microscope, energy-dispersive spectroscopy, and atomic force microscope to study the physical phenomena that occurred during the sliding.

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“…6 Wäsche et al. 34 reported that during sliding, in-situ micro-shearing of the top surface of the nano-additive layer takes place. This process produces secondary particles (wear debris and/or secondary nanoparticles) relatively smaller in size.…”

Section: Resultsmentioning

confidence: 99%

Antiwear and extreme pressure performance of castor oil with nano-additives

Gupta

Harsha

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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The aim of the present study is to examine the antiwear, antifriction, and extreme pressure performance of castor oil with nano-additives by using a four-ball tester. CeO2 (≈90 nm) and polytetrafluroethylene (≈150 nm) nanoparticles were used as an additive in castor oil with four different concentrations in the range of 0.1–1.0% w/v. The suspension stability of the nanoparticles was improved by using sodium dodecyl sulfate as a dispersant. Different analytical tools were used to characterize the nanoparticles parameter (i.e. shape and size) as well as the worn surfaces. The additive concentration was optimized on the basis of tribological performance. The test results of antiwear and extreme pressure property have been reported on the basis of wear scar diameter and weld load, respectively. For the antiwear test, it was observed that the maximum reduction in the wear scar diameter was 37.4 and 35.3% at an optimum concentration of CeO2 and polytetrafluroethylene additive, respectively. Also, antifriction and load carrying properties of castor oil were significantly improved with the addition of nanoparticles as an additive in a small amount. The mechanism for such improvement in the tribological behavior has also been discussed.

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Analysis of Nanoscale Wear Particles from Lubricated Steel–Steel Contacts

Cited by 14 publications

References 15 publications

Analysis of Wear Particles Formed in Boundary-Lubricated Sliding Contacts

Analysis of Wear Particles Formed in Boundary-Lubricated Sliding Contacts

Tribological evaluation of calcium‐copper‐titanate/cerium oxide‐based nanolubricants in sliding contact

Antiwear and extreme pressure performance of castor oil with nano-additives

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