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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.
Consumables are the part of a plasma cutting system that will wear out due to use. The two that wear the most quickly are the electrode and the nozzle. The temperature of the plasma arc in the torch is roughly 25,000 degrees Fahrenheit. The nozzle is made of copper due to it's superior properties of heat transfer.