Novel utilization of liquid feedstock in high velocity air fuel (HVAF) spraying to deposit solid lubricant reinforced wear resistant coatings

The ability to axially inject liquid feedstock has encouraged the thermal spray research community explore this concept deposit coatings for various next generation functional applications. current study explores utilization of in high velocity air fuel (HVAF) spraying solid lubricant reinforced wear resistant first time. successfully demonstrates use a powder-suspension hybrid processing approach incorporate Boron Nitride (as suspension) Cr3C2–NiCr powder) cermet matrix. Coatings were characterized using Scanning Electron Microscopy and Raman Spectroscopy analyze their microstructure phase constitution. results show that tribological performance hexagonal boron nitride (hBN)-incorporated composite coating was significantly better than traditional powder-derived coating. Such hBN-incorporated are needed improve mechanical properties enhance overall metallic components used applications, especially at temperature such as cylinder bore, pistons, deformation tools, etc. limitations based lubricants motivates hBN it can form protective lubrication tribo-film. concludes emerging HVAF technology accommodate be utilized create multi length scale microstructures which attractive combining different attributes same system.