Study on the Influence of Surface Texture on the Lubrication Performance of Tribopairs under High-Temperature Environments

Abstract

At high temperatures, there will be changes in the physical and chemical properties of the lubricating oil film, changes in the surface condition of the tribopair material, and instability at the interface due to thermal-mechanical coupling; thus, the lubrication performance will decrease or fail. Therefore, to solve the problem of lubrication conditions, an organised microscopic structure can be formed at the surface of the tribological interface by employing the technology of surface texture. The purpose of this paper is to systematically study the effect of surface roughness on the lubrication performance of tribopairs at high temperatures. First, we will specify that the field-coupling nature of lubrication failure due to high temperature is complex. Then, the Parameter Design Theory for Texture Geometry and a Substrate Stability Criterion Based on Thermodynamics are developed. Finally, we can conclude that the internal regulation mechanism of how a rough surface improves the high-temperature lubrication performance of oil is to change the distribution of pressure and temperature in the oil film, increase interfacial mass and heat transfer, and create a synergistic effect with the boundary lubrication film. Organise the theoretical basis for the development of high-performance surface texture design in harsh environments in this paper.