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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.
ZrC coatings have been growth by electron-beam bombardment, (6) laser cladding, (7) pulsed laser ablation-deposition, (8) magnetron sputter deposition, (9) and chemical vapor deposition (CVD) (10-16) and Among these methods, CVD has advantages over the others in that it could be used to uniformly coat not only flat surfaces, but also complex-shaped components like particles and cutting tools.