Tribological Properties of SiO2@Cu and SiO2@MoS2 Core–Shell Microspheres as Lubricant Additives

Herein, core–shell structural SiO2@Cu and SiO2@MoS2 microspheres were prepared using SiO2 as hard core, Cu MoS2 shell. As lubricant additives introduced into base oil (PAO 40), their friction reduction wear resistance investigated in detail. Comparing with onefold additive (SiO2, MoS2), such can improve the tribological behaviors at Hertz contact stress range of 1.26–2.72 GPa (SiO2@Cu reduces up to 32.47% 67.86% 2.72 GPa, respectively). Besides, properties are superior that (the volume was reduced by 48.45% GPa). The excellent be ascribed its advantage, synergistic effect core rolling SiO2, easy-shearing self-repairing shell offer a lubrication function form dense protection film, thereby contributing optimal performance.