TY  - JOUR
T1  - Significance of Standoff Distance on Character Features of Detonation
Spray Alumina on Unhardened EN 19 Steel
AU - Velayudham, A. AU - Haridasan, V.P. AU - Krishnamurthy, R. 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 7
SP  - 2309
EP  - 2315
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.2309.2315
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.2309.2315
KW  - Detonation spray
KW  -EN19 steel
KW  -standoff
KW  -XRD
KW  -microhardness
KW  -SEM
AB  - 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 (&gamma;Al<Sup>2</Sup> O<Sup>3</Sup> in the coated surface in addition to &alpha;-Al<Sup>2</Sup> O<Sup>3</Sup> phase indicates tenacious 
nature of deposition.
ER  -