Atmospheric plasma spraying:

In atmospheric plasma spraying a high current arc is used to generate a thermal plasma jet. The arc is started by high frequency high voltage ignition and maintained by atmospheric electrical power supply. Inert gases passing the gap between the electrodes are heated up by the arc. Thereby monoatomic gases like argon or helium are partially ionized and molecular gases like hydrogen or nitrogen are dissociated prior to ionization. During recombination of ions and electrons and re-formation of molecules energy is set free and results in temperatures of the plasma jet up to 10,000 K in the core at the gun exit. Due to the extreme increase in temperature there is strong acceleration of plasma gases inside the plasma torch.

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