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Speed‐ and topography‐dependent boundary friction characteristics of steel
Author(s) -
Aoki Saiko,
Suzuki Akihito,
Masuko Masabumi
Publication year - 2010
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.114
Subject(s) - tribometer , lubrication , adsorption , materials science , boundary lubrication , tribology , layer (electronics) , base oil , stearic acid , friction modifier , composite material , transverse plane , chemistry , scanning electron microscope , lubricant , structural engineering , engineering , organic chemistry
A novel tribometer that undergoes significant changes at ultra‐slow (>5.0 µm s −1 ) to moderate (<20 cm s −1 ) sliding speeds was developed in order to study the friction‐speed characteristics of steel lubricated with oil. Three different surface topographies were applied to the specimens, and the friction characteristics with an additive‐free base oil (MO91) and a stearic acid‐formulated oil (StA/MO91) were studied to understand the effects of surface textures on the lubrication performance of an adsorbed molecular layer formed by StA. Friction reduction behaviour of the adsorbed layer observed in the transverse direction was attributed to microscopic hydrodynamic action that maintained the load‐carrying performance of the adsorbed layer. Copyright © 2010 John Wiley & Sons, Ltd.