text: Several variations of thermal spraying are distinguished:
  *Plasma spraying
  *Detonation spraying
  *Wire arc spraying
  *Flame spraying
  *High velocity oxy-fuel coating spraying (HVOF)
  *High velocity air fuel (HVAF)
  *Warm spraying
  *Cold spraying
  *Spray and Fuse
  In classical (developed between 1910 and 1920) but still widely used processes such as flame spraying and wire arc spraying, the particle velocities are generally low (< 150 m/s), and raw materials must be molten to be deposited. Plasma spraying, developed in the 1970s, uses
  a high-temperature plasma jet generated by arc discharge
  with typical temperatures >15,000 K, which makes it
  possible to spray refractory materials such as oxides, molybdenum, etc.