Mechanical and Surface Wettability Analysis of Rare Earth Modified Composite Coating Developed Using Metal Spraying

The high pressure-high velocity oxy fuel (HP-HVOF) process is a thermal spraying process (TSP) for developing the high melting point powder ceramic coating over the surface. The mixture of used rare earth, the erbium oxide is an untouched rare earth oxide in the field of metal spraying and the likes of metal spraying such as the HP-HVOF process is a recently industrial opted process; which is the modified form of the HVOF process. This paper articulates the effects of rare earth (La2O3/CeO2/Er2O3-0.4 wt% each) addition on tungsten carbide coatings developed using high pressure-high velocity oxy fuel process on Martensitic steel having grade SS410. These effects have been analyzed using surface (like scanning electron microscope (SEM), porosity, surface roughness, wettability, and energy dispersive spectroscopy (EDS) test) and mechanical (such as tensile, flexural, and hardness test) characterization has been carried out on coated and uncoated samples. The porosity level of the coating was less than one percent, and the static water contact angle for coated sample (& AP;130o) was higher than the substrate (& AP;63o). This shows that fabricated coating is hydrophobic in nature. Moreover; the identification of doped elements has been done using EDS. The comparisons between the substrate and the coated samples have been done and the result shows that the coated sample possess enhanced surface and mechanical properties.