What is thermal spraying?
Thermal spray processes involve delivery of material usually within the size range of 5 to 200 microns at a high speed towards a surface. Historically this material took the form of liquid droplets that were heated by a flame and transported within a flame towards a surface where the splashing phenomena and subsequent solidification were able to create a holding strength for the deposited droplets and the resulting coating. Today, the size of material transported has reached the bottom limit of the particle size range and may not necessarily be in a molten state. Furthermore, the form of material fed into a thermal spray source may not necessarily only contain powder.
