Publikacje

Abstract:

The article presents research on the influence of single-mode and multi-mode fiber lasers on the micromachining effects of a diamond-like carbon (DLC) coating surface. DLC coatings are a form of amorphous carbon consisting of sp2 bonds characteristic of graphene and sp3 bonds found in diamond. Depending on the proportion of these bonds, DLC coatings exhibit different tribological properties. These coatings are commonly used to reduce wear on parts. It has been proven that the texture applied to the surface of these coatings improves their tribological properties under lubrication conditions. The changes in the geometric profile of the obtained groove on the coating surface were analyzed using various parameters of the laser process. A comprehensive characterization of the obtained effects was carried out, namely microstructure, hardness, wear resistance and adhesion of the layer with the substrate. The experimental results showed significant differences depending on the laser beam parameters, indicating that the properties of the DLC layer can be precisely controlled by adjusting the processing parameters. The tests were carried out on DLC a-C:H coatings obtained by PVD magnetron sputtering deposition on stainless steel 1.4034. This research may contribute to the development of a laser surface treatment method to improve wear resistance and durability in applications where DLC layers play a key role, such as in the automotive, tooling, and medical industries.

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The effect of micro-machining with a single-mode and multi-mode fiber laser on the surface of DLC coatings