Authors : V.P. Haridasan, A. Velayudham and R. Krishnamurthy
Abstract: Coating of ceramic material is a promising approach to modify the surface characteristics of low alloy steels. Detonation spraying is widely employed to coat alumina ceramic powder for wear resistance applications. To study the efficacy of the spraying it is essential to characterize the coating. This study elucidates the significance of standoff distance on character features of detonation sprayed alumina on unhardened EN19 steel. In this study, experimental results are presented in terms of micro hardness, coating thickness and XRD patterns of detonation sprayed alumina coatings as a function of standoff. The highest hardness value occurs at the spraying distance of 220 mm and corresponding SEM micrograph indicates denser microstructure. Presence of (γAl2 O3 in the coated surface in addition to α-Al2 O3 phase indicates tenacious nature of deposition.
V.P. Haridasan, A. Velayudham and R. Krishnamurthy, 2019. Significance of Standoff Distance on Character Features of Detonation Spray Alumina on Unhardened EN 19 Steel. Journal of Engineering and Applied Sciences, 14: 2309-2315.