Laser Surface Texturing to Realize Micro-grids on DLC Coating: Effect of Marking Speed, Power, and Loop Cycle

Abstract In the present study, laser surface texturing was tested with aim of improving tribological properties a diamond-like carbon (DLC) coating. Two experimental campaigns were designed to realize different micro-grids, and study effect marking speed, power, loop cycle. The grid profiles obtained analyzed using digital microscope probe system measure track cross section. At end experiments, authors identified good-quality by imposing speed 300 mm/s, power 0.5 W, one For condition, presence defects (such as cracks) on both coated at substrate/coating interface analyzed. Furthermore, coating nanohardness, adhesion substrate, wear behavior in dry condition investigated. results underline how can improve DLC (wear tracks lower than 30%) without considerably affecting other properties.