“…Likewise, the composite coatings incorporating a variety of nanoparticles made up of nano-sized Alumina oxide [10][11][12], Zirconium oxide [13][14][15], Titanium oxide [16], Iron (III) oxide Fe 2 O 3 [17], Cerium Oxide CeO 2 [18] and carbides such as Silicon Carbide [19,20] and Tungsten Carbide WC [21] have enhanced anti-wear, anti-friction, anti-corrosion and mechanical properties. In addition, in composite coatings/materials the concentration of reinforcement content of nanoparticles is an important factor to obtain optimum tribological properties.…”