Abstract :
A number of electroheat processes operate through the formation of an ionised state primarily in the form of a glow or an arc discharge. The author looks at normal glow discharges; the energy source for the CO 2 laser, plasma chemistry and surface treatment; abnormal glow discharges: carburising and nitriding surface treatments; and arc discharges; the energy source for Nd:YAG and ruby lasers, plasma chemistry, plasma arc for cutting, welding or spraying, plasma furnaces, arc furnace for metal melting, and arc welding
