Effects of annealing treatment on tribological behavior of tungsten-doped diamond-like carbon film under lubrication (Part 2): Tribological behavior under MoDTC lubrication

Abstract Molybdenum dialkyldithiocarbamate (MoDTC) is widely used as a friction modifier in engine lubricating oil. Under MoDTC lubrication, the and wear behaviors of tungsten-doped diamond-like carbon (W-DLC) films annealed at 100–400 °C were discussed evaluated using scanning electron microscopy (SEM), atomic force (AFM), Raman spectroscopy. (polymerized alpha olefin) PAO + coefficient all samples decreased, but rates W-DLC 300 increased significantly. By interacting with zinc dialkyldithiophosphate (ZDDP), different temperatures declined significantly owing to formation dense phosphate tribofilms on worn surfaces.