Abstract

Atmospheric plasma sprayed carbide cermet coatings have more porosity, lower hardness and bond strength compared with HVOF(High Velosity Oxy-Fuel) sprayed coatings. This paper described hybrid technique combined with plasma spraying and metal diffusion treatment in order to get improved denser, harder and higher bond strength coatings. In this study, a pure chromium carbide layer, perfomed on the top of the coating area, was evaluated by cross sectional SEM image, X-ray diffraction analyis, microhardness tests. This perfomed layer showed extremely high density with outstanding hardness values in terms of plasma sprayed carbide coatings has been achieved.

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