Splat analysis of plasma sprayed (Al + Ni + h(BN)) homogenized mixture for improvement of abradable resistance on aero-engine inner casing surface

Abstract

In the past few years, there is a global need for engine manufacturers to give high performance and long durable engines by using good quality of materials. Previously, engine manufacturers have applied protective coatings to increase the life and performance of the aero engine. Today, a wide variety of parameters in environmental and material design challenges together with the component design of engines demanded towards the economic protective coating processes. In an aero engine, the protection against wear inside the inner surface casing is a great challenge. Present work is focused on the study of improvement of abradable resistance on aero-engine inner case materials by using a plasma spraying technique. Different wt% of (Al + Ni+(h)BN) homogenized powder mixture and sodium silicate as an inorganic binder is used for spraying. The surface property analysis of plasma sprayed coating has been characterized using, optical microscopy, scanning electron microscopy, X-Ray diffraction and Vicker hardness tester. It was found that the coating using (Al + Ni+(h)BN) homogenized powder is successful in finding optimum stand-off distance which can increase the life span of the aero-engine casing.