High Velocity Oxygen Fuel (HVOF) Thermal Spray Systems
High-Velocity Oxygen Fuel (HVOF) is a high velocity, low temperature thermal spray process used for the production of metallic and hard facing coatings.
This thermal spray process utilises the combustion of gases such as hydrogen, methane, propane, propylene, acetylene, natural gas or liquid fuels such as ethanol or kerosene. Fuel and oxygen atomise and mix within the combustion area. This mixture is ignited at controlled temperatures and pressures resulting in a flame with supersonic velocity. Material is injected into the flame and propelled towards the substrate to form the coating.
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Atmospheric Plasma Spray (APS) Systems
The plasma spray process is commonly referred to as air or Atmospheric Plasma Spray (APS). Plasma is an electrically conductive gas containing electrically charged particles, ions and electrons. The ionized gases heat up to temperatures approaching 15,000°C and expand to reach supersonic gas exit velocities.
Plasma thermal spray is the most versatile and flexible thermal spray process due to its ability to spray a wide range of materials such as most metals, ceramics and alloys onto many different substrate materials such as plastics, glass, metals, ceramics and composite materials. Also, a broad range of powder particle sizes can be used. Benefits of APS applied coatings include resistance against oxidation, wear from abrasion and erosion, corrosion protection, clearance control, temperature management as well as electrical resistivity and conductivity. Thus APS coatings can be used for a wide range of applications across industries.
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