Effect of ZnO on tribological properties of MoS2 dry film lubrication coatings

Abstract

Abstract As a key component of the high-speed railway brake system, high-speed railway brake disc bolts are often lubricated with MoS2 lubrication coating, and the friction performance of the coating is a key factor in ensuring the operation of the equipment. The friction performance of the coating is a key factor to ensure the operation of the equipment. In this paper, the effect of ZnO on the friction performance of MoS2 dry film lubrication coating and the performance of MoS2 dry film lubrication coating were studied. SEM and EDS were used to characterize the coating morphology and abrasion marks, SEM and EDS were used to characterize the coating morphology and abrasion marks, and a friction and wear tester was used to study the effect of ZnO addition, particle size, and working temperature on the friction performance of the coating. It was found that the mechanism of ZnO is to harden and support the film-forming structure of the coating to ensure the integrity of the lubricant film and enhance the anti-wear performance of the coating. The optimal amount of ZnO is 5%, the optimal particle size is 30 nm, and the optimal operating temperature is 100°C. The results of this paper provide a theoretical basis for further optimizing the preparation and performance of MoS2 dry film. The results of this paper provide a theoretical basis for further optimizing the preparation and performance of MoS2 dry film lubrication coatings.