Combustion Spraying Systems

Abstract

The growth of combustion processes along the years was driven both by scientific and technical developments providing disruptive innovations and by the market requirements )(e.g., the development of HVOF spraying by Browning in 1983 was pushed forward by the need to produce WC-Co cermet coatings with superior properties). The different processes are presented with for each one the principle, the type of materials used (powder, liquid wire cord or rod), then materials sprayed, sprayed particle temperatures, velocities and oxidation, types of coatings obtained and finally the process modeling. Successively are presented flame spraying, High Velocity Oxy-Fuel (HVOF), and High Velocity Air-Fuel spraying and modified HVOF processes and finally Detonation gun (D-gun).