Effect of Air Plasma Spraying Parameters on the Quality of Coating

Year 2016, Volume: 2 Issue: 2, 1 - 5, 30.12.2016

Mokhtar Djendel Et Al.

Abstract

In this study, air
plasma spraying (APS) has been used to produce a cermet’s composite coating
based on powder of ceramic oxides (Al₂O₃-3%wtTiO₂)
reinforced by mineral powders as bonding material (Ni-20%wtCr6Al) at different
rates onto AISI 304 stainless steel substrates. Coating deposition by plasma
spraying involves a number of process variables such as powder flow rate,
electric current and standoff-distance., which participate in a large way to
the best quality of the coating. The obtained results showed that a higher
spraying power and a shorter spraying distance result in the higher deposition
efficiency, the better microstructure and the higher micro-hardness for the
coating. It is concluded that the spraying power and distance are important
factors influencing the deposition efficiency, microstructure and
micro-hardness of the plasma sprayed (Al₂O₃-3% wt TiO₂)
coating.

Keywords

Air Plasma Spraying (APS), Process Variables, coating, Microstructure

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