Effect of Third-Particle Material and Contact Mode on Tribology Contact Characteristics at Interface

A moving pair with two-body contact is the ideal situation assumed in previous analyses. However, all pairs are a three-body state at start of operation or immediately after operation, such as bearings, ball-screws, gears and engines. This work studies influence wear particles (SUJ2), environmental (SiO2 Al2O3) nano-additives (CuO) on tribological characteristics under different particle concentrations, sizes, surface roughnesses modes. The microcontact analysis revealed that differences real area, area separation four-particle materials s–s p–s modes rather small. Under hybrid mode, difference relatively large sequence value obtained due to elastic modulus for material this interface Al2O3 > SUJ2 CuO SiO2. order other two reversed. increases size concentration increases. critical load required transform three kinds SiO2 Al2O3. On nearly initial plastic ratio first then decreases because original spot number increase load. At same time, elasto-plastic low Among four third-particle materials, experimental results theoretical predictions show particles, Al2O3, cause maximum friction observed interface.