A strong electric arc is generated between a positively charged pole (anode) and a negatively charged pole (cathode). This ionizes the flowing process gases into the plasma state. Powdered feedstock material is injected into the plasma jet, melting the powder particles and propelling them to the surface of the workpiece.

Process Basics

Heat Source	Plasma Arc
Material	Powder (ceramics, plastics, metal)
Arc Temperature	approx 16'000 °C
Particle Velocity	200 to 400 m/s
Spray Performance	35 to 100 g/min
Schematic Diagram

Process Features

• Most flexible of all the thermal spray processes, with sufficient energy to melt any material
• Excellent control of coating thickness and surface characteristics such as porosity and hardness

Typical Applications

Combustion chamber	Blades and vanes	Hip ladle