Thermal spray lab

High Velocity Oxygen Fuel Thermal Spraying Unit 

Specifications:

 A mixture of gaseous or liquid fuel and oxygen is fed into a combustion chamber, where they are ignited and combusted continuously. The resultant hot gas at a pressure close to 1 MPa emanates through a converging–diverging nozzle and travels through a straight section. The fuels can be gases (hydrogen, methane, propane, propylene, acetylene, natural gas, etc.) or liquids (kerosene, etc.). The jet velocity at the exit of the barrel ( 1000m/s) exceeds the speed of sound. A powder feed stock is injected into the gas stream, which accelerates the powder up to 800m/s. The stream of hot gas and powder is directed towards the surface to be coated. The powder partially melts in the stream, and deposits upon the substrate. The resulting coating has low porosity and high bond strength

Plasma Nitriding Unit

Applications:

• This technique involves extracting the accelerated ions from the plasma by applying a high voltage pulsed or pure DC power supply and targeting them into a suitable substrate or electrode with a semiconductor wafer placed over it. The electrode is a cathode for an electropositive plasma, while it is an anode for an electronegative plasma.