(10-26-2011, 05:36 PM)fahad03092 Wrote: For Plasma spray, if we increase powder feed rate should we need to increase or decrease carrier gas flow rate?
Increasing powder feed rate usually requires an increase of carrier gas to inject greater volume of powder into the 'sweet spot' of the plasma. The thermal dynamics of the spray stream need to be optimised in order to obtain desired coating qualities and stability of process. Too low a carrier can result in wasted material, unmelts and build up on injector/ powder port, etc. Too high and overheated, cooled particles and poor quality coating, etc can occur.
(10-26-2011, 05:36 PM)fahad03092 Wrote: Is carrier gas flow rate has any effect on powder feed rate?
Depends on the powder feed system used - what system?