Friction and Wear of Porous Sliding Bearings at High Temperature. Influence of MoS2 Nanoparticle Solid Lubricant

Wiśniewska-Weinert, H.

doi:10.1007/s11106-013-9543-5

Cited by 1 publication

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stribeck curves were calculated as a friction coefficient dependence on the Sommerfeld number (S). For this purpose, the applied normal load was step by step increased by 50 N (every 900 revolutions) starting from 220 N and ending with 970 N. Sommerfeld number was calculated [4] on the basis of from the following formula: where: p = P/L, L -a sleeve width, η is powder lubricant viscosity (0.69cP [3]), and u is the entraining velocity of the bearing surface, ε -clearance.…”

Section: Friction Testsmentioning

confidence: 99%

“…5b). The platelet shape WS2 nanoparticles formed due to special rolling cleavage technique [4] have sizes about 20 nm and thickness about 2-3 nm. The presence of nanoparticles at the sliding contacts after sliding about 6000 m proves the effectiveness of the sliding interface sealing which allows to preserve flow of the solid lubricant particles out of sliding interface.…”

Section: Sliding Bearing Design and Materials Structurementioning

confidence: 99%

“…The nanopowder lubricants [3] have recently demonstrated excellent lubrication capabilities during sliding at extreme temperatures in the case of use of porous nitrided stainless steel sliding bearings [4]. As shown by Heshmat [2], there are huge technological gains that can be achieved due to characterization of the powder lubricant behavior in high temperature sliding bearings and other friction units.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Surface Modification Of The High Temperature Porous Sliding Bearings With Solid Lubricant Nanoparticles

Wiśniewska-Weinert¹

2015

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

A surface modification of stainless steel bearing sleeves is developed to improve the tribology characteristics at high temperature. Solid lubricant nano-and microparticles are applied for this purpose. To create the quasi-hydrodynamic lubrication regimes, the solid lubricant powder layer is made by developed pressure impregnation technique. Porous sliding bearing sleeve prototypes were made by powder metallurgy technique. The purpose of the paper is to define the friction and wear characteristics of the sleeves and to determine the influence of sealing of the sliding interface on these characteristics. It is found that application of WS 2 sold lubricant nano-and micro-particles and preservation of a particle leakage out of interface allows to achieve at the high temperature the friction coefficients comparable to those at ambient temperature.Keywords: bearing sleeves, solid lubricant, powder layer, powder metallurgy, nano-and micro-particles Opracowano modyfikację powierzchni bieżni łożysk wykonanych ze stali nierdzewnej w celu poprawy charakterystyki tribologicznej w podwyższonej temperaturze poprzez zastosowanie stałego czynnika smarnego w postaci nano-i mikro-cząstek. W celu wytworzenia warunków kwasi-hydrodynamicznego smarowania, wytworzono warstwę z proszku smarnego na drodze infiltracji ciśnieniowej. Celem pracy było wyznaczenie charakterystyki ściernej i zużyciowej bieżni oraz określenie wpływu uszczelnienia ślizgających się powierzchni na te charakterystyki. Stwierdzono, że zastosowanie WS 2 jako stałego smaru w postaci nano-i mikro-cząstek oraz zabezpieczenie wypływu z granicy fazowej pozwala uzyskać wartość współczynnika tarcia porówny-walną z otrzymywaną dla temperatury otoczenia.

show abstract

Section: Friction Testsmentioning

confidence: 99%

Section: Sliding Bearing Design and Materials Structurementioning

confidence: 99%