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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.
PTFE (PolyTetraFluoroEthylene) (also known as Teflon) is a fluorocarbon-based conformal coating. PTFE coatings can provide a low co-efficient of friction or slipperiness, corrosion and chemical resistance, heat resistance, dielectric stability, and chemical inertness to the circuit assembly.ikipedia definition: Conformal coating material is applied to electronic circuitry to act as protection against moisture, dust, chemicals, and temperature extremes that, if uncoated (non-protected), could result in damage or failure of the electronics to function.