ZrO2 and ZrO2 -Y2 O3 coatings deposited by double pulsed plasma arc

A novel surface technique has been developed to produce ZrO₂ and ZrO₂-Y₂O₃ coatings on the surface of alloys by using double pulsed plasma arc to react with a solution film containing nano-oxide particles. These coatings exhibit smooth surface and excellent adhesion with substrate. The morphologies of the ceramic coatings and phases were analyzed. It was shown that the oxidation resistance of 18-8 stainless steel was markedly improved by applying ZrO₂ and ZrO₂-Y₂O₃ coatings.