S1106-1-5 Transition of Friction Behavior with Decreasing Sliding Velocity in Boundary Lubrication under Low Contacting Pressure Condition

Abstract

This paper describes the transition phenomenon of boundary friction in ultimately low speed condition under low contacting pressure condition. When lubricant containing the oleyl acid phosphate is used under the low contacting pressure condition, strong increase tendency in friction with sliding speed diminishes at less than 0.1μm/s of sliding speed. From the experimental results, it is found that boundary lubricant behaves as Bingham plastic material. Consequently this transition phenomenon of friction might be associated with structural force effect.