Thermal spray

A group of processes in which finely divided metallic or non-metallic materials, usually in the form of powder, are deposited in a semi molten state to a substrate to form a thermal spray coating.

Metals, alloys, ceramics and composites can all be thermally sprayed, providing varying coating thicknesses from a few micrometres to millimetres thick.

See also plasma spray, arc spray, flame spray, HVOF, cold gas dynamic spray.