Deposition of titanium nitrides composite ceramic coating by reactive plasma spraying method

Titanium nitrides composite ceramic coatings are a material which possesses high mechanical properties, being often used in order to protect the substrate thus increasing their lifetime and also working in harsh environments.In this study, the paper presents the experimental results on deposition of titanium nitrides composite ceramic coatings by reactive plasma spraying. In this way the advantages of the method is achieving high high hardness, obtaining improving quality coatings in the same time getting high productivity. Commercially pure titanium feedstock was used. The microstructure of the coating investigated both by optical and scanning electron microscopy shows that the coatings are dense and obvious lamellae structure. Surface roughness of the coating is about 3.259[tm.Vickers microhardness of the coating presents average values of 1444.1 Hv(0.1).