Study on Solid Particle Erosion Studies of Super Co-605

Abstract

The present research investigates the feasibility of using HVOF sprayed cermet coating Stellite-6 on gas turbine material SuperCo-605. The coating is tested for its resistance to erosion under high temperature conditions at 750°C. Solid particle erosion studies were conducted using alumina sand as the eroding agent. Erosion studies were conducted with impact angles of 30°, 60° and 90°. The oxide and carbide coating performs better under sand erosion conditions. Stellite 6 coatings are damaged by the brittleness mode. The erosion behavior of the substrate materials is ductile and more resistant than the coating material. SEM microstructures were used for scars produced by the erodent at 30, 60, and 90degree impact angles. This also indicates that the material damage was due to the ploughing and trapping of alumina particles.