Tribological properties of PTFE/PI-PAI composite coatings filled by GO/ZrO₂ on the surfaces of different micro-textures

Three different PTFE/PI-PAI composite coatings filled by GO/ZrO2 were designed to improve the tribological properties of engine bearing. The pentagonal and triangular textures were prepared on the surface of copper alloy by laser processing. The designed coatings were prepared on the surfaces of textures and smooth substrates by liquid spraying. The results indicated that the coating with 0.25 wt% of GO and 4.75 wt% of ZrO2 has the best tribological properties at room temperature and 75 degree celsius. The coating has the better mechanical and tribological performances on the surface of the pentagonal textures. The mechanical simulation showed that the contact stress and deformation of the coating on the pentagonal texture is less than that of the triangular texture.