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Plasma spray can be used to produce coatings. of virtually any metallic, cermet, or ceramic ma-. terial. The coatings are used for most of the types. of applications described in a subsequent section. The transferred plasma-arc process adds to. plasma spray the capability of substrate surface heat-. ing and melting. Figure 7 is a schematic repre-. sentation of the process.
There are two main options which can be used to coat steel, PVD and DLC coating. In short: PVD or Physical Vapor Deposition, is a process which vaporizes a number of metals, and then binds it on a surface, in layers, in a heated vaccuum. DLC or Diamond Like Carbon, is a different way to use the PVD process.