▎ 摘　　要

The effect of the addition of reduced graphene oxide (rGO) in atmospheric plasma-sprayed nanostructured Al2O3-13wt.%TiO2 and WC-25wt.%Co coatings was studied by varying the percentage weight proportion of rGO as 0.5, 1, and 1.5wt.%. The reason for adding rGO is that some critical issues such as brittleness, cracking can limit the applications of plasma sprayed coatings. Graphene being one of the allotropes of carbon, it has attracted great interest in recent times as a reinforcement for composite coatings due to its exceptional strength. To overcome the problems associated with plasma-sprayed coatings, the addition of reduced graphene oxide (rGO) as an additive is considered one of the best solutions to improve the characteristics and properties of these coatings. After the coatings were deposited and characterized, it was observed that the percentage of porosity in the coatings gradually decreases with increasing proportion of rGO. In addition, it was also noticed that the presence of rGO in the microstructure of the coatings increases the resistance to crack propagation due to the formation of a bridge between the bond coat and the top coat, thus improving the fracture resistance of the coatings.