Plasma-sprayed coatings, invented by Praxair Surface Technologies, are created by heating and accelerating powder material in a high-temperature plasma stream and projecting it against the surface. Standard production coatings include pure metals and metallic alloys such as nickel or ni-chrome and ceramics such as alumina, chromium oxide or alumina-titania, and cermets.
Low-Pressure Plasma Spray (LPPS)
LPPS is plasma spraying under low-pressure conditions. It offers all the advantages of plasma spray while delivering the inert environment to produce very dense coatings with ultra-low oxide content.
Shrouded Plasma Spray
Mixing the plasma stream with surrounding air causes oxidation of metallic powders during spraying. Our proprietary shrouded plasma spray technology provides an inert atmosphere surrounding the stream and is capable of producing low oxide content in metallic coatings equivalent to LPPS.
Suspension Plasma Spray
A modified version of air plasma spray, SPS utilizes liquid suspension of particles in place of dry powder feedstock. SPS provides for feeding of finer particle sizes (nanometer scale) that are very difficult to flow in dry powder form. This process is capable of unique coating microstructures.