Predicting the wear rate of Alumina/MoS2 nanocomposite coating by development of a relation between lancaster coefficient & surface parameters

In this research, the Al2O3/MoS2 nanocomposite coating layer was applied on the surface of Ti-6Al-4 V alloy by hybrid method (combination of Electro-Spark Deposition (ESD) and oxidation methods). Atomic force microscopy (AFM) analysis and pin-on-disk wear test method were used to study the surface and the wear resistance of the samples, respectively to determine the relation between them. Results showed that by applying a nanocomposite coating, the wear rate was decreased by approximately 59.5%, with a roughness of 248 nm and hardness of 718 Vickers was 1.15 x 10-4 mm3/m. Considering the obtained results, the influence of surface parameters such as roughness, coating thickness, and hardness on the Lancaster coefficient was studied and an equation was proposed to calculate it.

Automated summary

In this research, the Al2O3/MoS2 nanocomposite coating layer was successfully applied on the surface of Ti-6Al-4 V alloy. The relation between the surface characteristics and wear resistance of the coating was studied using atomic force microscopy analysis and pin-on-disk wear test method. The results showed that the nanocomposite coating significantly reduced the wear rate and provided an equation to calculate the Lancaster coefficient.