Formation peculiarities and tribo-physical properties of lubricating layers contacting with heated surface

摘要

Composition, physical-mechanical and friction properties of lubricating layers formed on steel by inactive and chemical-active lubricant components is studied by electrical probing methods and XPS analysis. Combined measurements of friction and contact conductivity both in static and dynamic point contact have shown the approach to be promising in separate studies of properties of physically adsorbed layer (A-layer) and chemosorbed layer of deposits (D-layer). The confirmation have been obtained that D-layers can be formed on metal surface at elevated temperatures by both active additives and inactive components of mineral oil. Lubricating layers with different physical-mechanical and frictional properties can be formed depending on chemical origin of the lubricating medium and temperature regime.