Characterization of Ni-Based Composite Coating HVOF Process

In the present study, the NiCrBSi composite coating was done on 304 Stainless steel by a High-velocity oxyfuel process. Oxygen flow rate, LPG flow rate, coating powder feed rate, and spray distance constant process parameters have been chosen because they have a greater impact on the finished condition of the coating. The composition and structural properties of the feedstock powder and coated substrate were studied using X-ray diffraction (XRD). The XRD results confirmed the crystalline nature of the composite coating powder and coated substrate. Further, scanning electron microscopy (SEM) was also performed to study the morphology of both feedstock powder and coated substrate. SEM micrograph shows that the NiCrBSi are somewhat sphere-like morphology and they were interlinked with each other. FESEM micrograph images confirmed the coating is done smoothly.