An approach to characterisation of producibility and lubricity of reacted films under boundary lubrication

Abstract Boundary oil films can be transformed into reacted films during an extremely short period of time under certain conditions of reactive dynamics. A comprehensive index R is introduced to characterise the producibility and lubricity of the reacted films. Index R, which is calculated using maximum and minimum friction coefficients in the formation process of the reacted films as well as from the reacting and maintaining periods of the films, is correlated to conditions of reactive dynamics, such as temperature, pressure, and velocity.