HVOF
The High Velocity Oxygen Fuel (HVOF)
spray process efficiently combusts oxygen and a gaseous or liquid
fuel to produce high kinetic energy while controlling the heat
input. In this process, the coating material, which is in powder
form, is introduced into the hot gas stream and uniformly heated
until it reaches a molten or semi-molten condition.
The
combination of high particle velocities, uniform heating, and low
dwell time results in coatings that are dense and tightly bonded to
the substrate. This process ensures more predictable coating
chemistries and creates coatings with fine, homogeneous
microstructures.
Photo Courtesy of Westaim Ambeon
Characteristics
Flame Temperature:
Approximately 5,000°F (2,760°C)
Fuel Gases:
Propylene or Propane or Hydrogen
Particle Speed:
Up to 4,500 ft/s (1,400 m/s)