High velocity oxygen fuel coating

High-velocity oxygen-fuel spray (HVOF), CS and PTS methods are possible deposition methods to apply such coatings. PTS utilizes high heating and laige... 

Thermal spray processing A coating process where material (wire, rod, powder) is melted by a flame, plasma, electric arc, or some other means and the molten particles are propelled in a high velocity gas stream to the substrate surface, where they are splat cooled at a high quench rate. See also Arc-wire spray Detonation flame spraying Flame spray High velocity oxygen fuel (HVOF) spray Plasma spray. 

Li C J, Li W Y, Effect of sprayed powder particle size on the oxidation behavior of MCrAlY materials during high velocity oxygen-fuel deposition . Surf Coat Technol, 2003, 162(1), 31 1... 

High Velocity Oxy-Fuel Process (HVOF) Mixture of a combustible gas (such as propane) and oxygen ignited inside a combustion chamber to melt a coating material before it is accelerated via an inert carrier gas at high speeds toward a surfece, where the hot material forms a coating. Hydroxyapatite Naturally occurring mineral form of calcium apatite with the chemical formula Ca,o(PO,)e(OH),. 

For gas combustion processes, the lower-energy flame spray process uses oxyfuel combustible gas as a heat source to melt the coating material, which may be in the form of rod, wire, or powder. In the higher-energy, high-velocity oxyfuel combustion spray (HVOF) technique, internal combustion of oxygen and fuel gas occurs to produce a high-velocity plume... 

With HVOF, the coating is heated to near or above its melting point and accelerated in a high-velocity combustion gas stream. Continuous combustion of oxygen fuels typically occurs in a combustion chamber, which enables higher gas velocities (550 to 800 m/s). Typical fuels include propane, propylene, or hydrogen. 

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