Effect of MOS₂-Based Composite Coatings on Tribological Behavior and Efficiency of Gear

MoS₂-based Ti composite coatings were deposited on the AISI 4118 alloy and gears using an RF magnetron sputtering (RFMS) system. While MoS₂ coating had been coated on the silicon substrate. The coatings structures were compared to each other to find the effect of Ti. The composite coatings have been performed by a ball-on-disk tribometer to investigate tribological behavior at various conditions. The structure of the coatings has been extensively studied by a variety of techniques, including X-ray diffraction (XRD) and scanning electron microscopy (SEM), etc, respectively. The composite coatings were also applied the gears of a reduction gearbox. The efficiencies of uncoated and coated gear with MoS₂ based Ti coatings were measured and compared at various input rotating speed under absorption oil film condition. It was found that the efficiency of gear had significantly improved after MoS₂-based Ti composite coatings deposition.