Characterization of Ni-base Matrix Composite Coating produced by Thermal Spray Technique

In this study, the thermally flame-sprayed of nickel coatings and incorporating ceramic particles (SiC and Al2O3) with different concentration and studied the  comparing the effects of their particles on microstructure, morphology, and Vickers of incorporating ceramic particles (SiC and Al2O3) and their concentration were deposited on low carbon steel substrate. The microstructure investigation of the deposited alloy was studied using the optical microscopic and scanning electron microscope (SEM). And other characterizations of the coatings are examined through x-ray diffraction and roughness test. Vickers microhardness test is run for the coatings’ hardness measurement. The results showed the homogenous distribution of particles by fully dispersing in the nickel matrix. The surface was dense and high adhesive and continuous with the best heterogonous codeposition mixture of ceramic particles (Ni-SiC with Al2O3). The surface roughness increased with the addition of composite powders (SiC and Al2O3). The surface hardness of the coatings has been enhanced as a result of the thermal flame-sprayed alloy coating.