Abstract
Slurry erosion is one of the primary reasons for performance decrement of hydropower turbines; Therefore, the present study investigates the slurry erosion performance of high velocity flame sprayed (HVFS) nickel matrix base coating compositions in which multi-dimensional sized (submicron, and nanostructured) TiO2, and Al2O3 ceramic particles were added as reinforcement. The experiments were carried out using a non-recirculating jet type slurry erosion test rig. The potential effect of influential parameters such as impact velocity, slurry concentration, and average particle size were also estimated under different erosive conditions. The results showed that the as-sprayed Ni-40TiO2 coating exhibited the highest slurry erosion resistance than Ni-20TiO2-20Al2O3 coating and uncoated steel specimens. Further, the eroded surface of uncoated steel and Ni-40TiO2 coating showed mixed behaviour (ductile and brittle) and Ni-20TiO2-20Al2O3 coating exhibited brittle behaviour as the mechanism of material removal.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
