A New Solution to Save Production Costs in the Deposition of the Wear-Resistant Coating

Plasma spray processes are widely applied in industry. The inert gases are the monoatomic ones that provide the plasma stream at a high temperature but not too high enthalpy. The merit of the inert gas is the elimination of feedstock and the deposition from oxidation. Very few research publications have focused on the use of ordinary air for plasma generation. However, air is the most recommended plasma generation gas since its cost is competitive, and especially in spraying ceramic material, it has a definite advantage. To save on production costs, it is useful to find substitutes for expensive traditional powder materials and inert gases (e.g., argon and helium). They can be amorphous materials, especially Fe-based amorphous materials. This chapter focused on the updated achievements with air plasma spraying using the Fe-based amorphous coating to deposit a competitive wear resistance.