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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 has one of the lowest coefficients of friction against any solid. PTFE is used as a non-stick coating for pans and other cookware. It is very non-reactive, partly because of the strength of carbonâfluorine bonds and so it is often used in containers and pipework for reactive and corrosive chemicals.ore-Tex is a material incorporating a fluoropolymer membrane with micropores. The roof of the Hubert H. Humphrey Metrodome in * Minneapolis, US, was one of the largest applications of PTFE coatings. 20 acres (81,000 m 2) of the material was used in the creation of the white double-layered PTFE-coated fiberglass dome.