Air plasma spraying
Atmospheric plasma spraying is a versatile thermal spray process for the highest quality, reliability and durability. In a plasma torch, an electric arc is generated between the anode and the cathode with direct voltage. Through this current, the plasma torch gas or gas mixture passes through the arc and thereby ionizes. In the generated plasma jet, which usually has a supersonic speed, a powder is injected, which is melted by the high plasma temperature. The plasma jet entrains the powder particles and throws them onto the substrate to be coated. The gas molecules return to a stable state after a short time, so the plasma temperature drops again after a short distance. This extra energy is transferred to the powder particles.