HVOF (High Velocity Oxygen Fuel) Thermal Spray Coatings are produced by first mixing a fuel gas and oxygen within a chamber. The resulting mixture exits the chamber through the nozzle and ignites. The powder feedstock is then fed via carrier gas, axially, into the ignited gases and is propelled uniformly to the substrate.
Using both kinetic and thermal energy, the molten particles impact the substrate producing a coating with characteristics unachievable with the Plasma Spray Coating Method. The HVOF process creates extremely dense coatings with bond strengths in excess of 10,000 PSI. A distinct advantage of the HVOF process includes the ability to produce very low surface roughness. This frequently results in easier and faster finishing- many times eliminating it completely. Further, HVOF coatings produce a very accurate and homogeneous chemistry.
HVOF Coatings include:
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