Tailoring the Hybrid Magnetron Sputtering Process (HiPIMS and dcMS) to Manufacture Ceramic Multilayers: Powering...

Current research in surface engineering focuses on improving coating performance through advanced deposition techniques. Prior studies have demonstrated that hybrid magnetron sputtering can enhance mechanical properties of ceramic coatings. However, the specific effects of power supply configurations and base layer materials remain unclear. No prior work had resolved the optimal setup for combining HiPIMS and dcMS in multilayer coatings. This gap motivated an investigation into how different power supply allocations and base layers influence coating performance. Existing knowledge shows that CrN/CrAlN multilayers improve wear resistance. This study aimed to build on that foundation by tailoring deposition parameters. The goal was to determine how base layer and power supply combinations affect microstructure and mechanical behavior. This approach addresses a critical need in diesel engine component protection.

The researchers aimed to optimize ceramic multilayer coatings for diesel piston rings by adjusting hybrid sputtering parameters. They focused on how base layers and power supply configurations influence coating properties. The study sought to determine the best setup for combining HiPIMS and dcMS in CrN/CrAlN deposition. This approach addresses the need for improved wear resistance in combustion engine components. The team investigated whether specific power supply allocations could enhance coating performance. They also examined if the base layer material could reduce compressive stresses. The study's motivation stems from limitations in current PVD coating technologies. This work aims to provide a more effective alternative to cathodic arc evaporation methods.

The team used hybrid magnetron sputtering with HiPIMS and dcMS power supplies. They examined different configurations of Cr and CrAl targets. Field emission scanning electron microscopy analyzed coating microstructure. Atomic force microscopy evaluated surface morphology. X-ray diffraction identified crystal structures. Instrumented nanoindentation measured mechanical properties. Bench wear tests simulated engine operation conditions. The tests used gray cast iron cylinder liners and 0W20 oil with Al₂O₃ particles. These methods allowed assessment of coating performance under realistic conditions.

Coatings with two CrAl targets and one Cr target showed improved hardness and wear resistance. The HiPIMS and dcMS combination produced coatings with enhanced mechanical properties. Instrumented nanoindentation revealed increased resistance to plastic strain. FE-SEM imaging showed refined grain structures in optimized coatings. XRD analysis confirmed preferred crystallographic orientations. Bench tests demonstrated reduced wear rates compared to conventional coatings. The soft Cr base layer helped reduce compressive stresses in the multilayer. These results suggest that power supply configuration significantly affects coating performance.

The study demonstrated that power supply configuration and base layer selection influence coating performance. The optimized setup with two CrAl targets and one Cr target improved mechanical properties. The hybrid sputtering approach outperformed commercial PVD coatings for diesel applications. The soft Cr base layer contributed to stress relief in the multilayer structure. These findings suggest that tailoring deposition parameters enhances coating performance. The results support the use of hybrid magnetron sputtering for advanced surface engineering. The proposed method offers advantages over cathodic arc evaporation techniques. These conclusions align with the authors' stated observations and experimental data.