Effect of LPPS on Mechanical Properties of Al₂O₃ Coatings and Examination of Optimum Spraying Conditions

Abstract

A special attention has been paid to the low pressure plasma-spraying (LPPS) to obtain dense and thick ceramic coatings on metal components. In this study, the effect of LPPS on mechanical properties of Al₂O₃ coatings was compared with that of atmospheric plasma-spraying (APPS). The LPPS method improved the density, Vickers hardness, adhesive strength and wear resistance remarkably. When the spraying distance was 300mm, optimum conditions of LPPS for dense coatings were 500-600A and 60-65V.