Abstract
Application of POM gears becomes widespread because of low manufacturing costs, light weight, and chemical stability However, POM gears cannot be operated in severe conditions due to tooth breakage and melting. In the present paper, deposition methods of DLC films for POM gears with UBM sputtering were investigated to improve tribological performance and endurance of POM gears. As a result, cleaning using organic solvents and deposition of Cr/C gradient interlayer enabled DLC films to be deposited on POM gear flanks However, deposited DLC films were not improve endurance of POM gears According to observations of tooth flanks, it was found that DLC films on tooth flanks were disappeared on contact area with sliding. To investigate deposition methods would permit the optimum ones to be found for a DLC film wear resistance of POM gears improving.
