Solid Particle Erosion Wear of Plasma Sprayed NiTi Alloy Used for Aerospace Applications

Abstract

Abstract In this investigation, NiTi coatings are applied by atmospheric plasma spraying. Surface and interface morphology of the as-deposited material is studied using scanning electron microscopy, the presence of the different phases are revealed by X-ray diffractometry, and microhardness is determined by Vickers hardness testing. The as-deposited coatings are exposed to air-borne particle erosion to investigate their wear properties while varying erodent impact pressure and angle. It was found that the plasma sprayed NiTi splats are well formed with significant amounts of intermetallic and oxide phases at the surface and interface, contributing to dense splat formation and higher hardness.