Metal spraying process that is used to apply a hard surfacing to a softer material to add wear resistance while still retaining their original characteristic. This process uses an electric arc between an electrode and a nozzle, through which an ionized gas flows to melt the coating and to spray it onto the material in question.
Plasma spraying, one of the thermal spraying family, is a materials processing technique for producing coatings and free-standing parts using a plasma jet. Deposits having thickness from micrometers to several millimeters can be produced from a variety of materials - metals, ceramics, polymers and composites.