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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.
Since air is composed of approximately 70% nitrogen and 30% oxygen, it is often used to perform plasma treatments as a less expensive, yet still very effective method. Argon Plasma. .. is one type of plasma that is used for surface modification in our plasma technology systems ..