Characterization of an Axial-Injection Plasma Spray Torch

Abstract The Axial III™ torch is a multiple-arc plasma generator with set of three single cathode–anode units, which still significant importance, especially in the field suspension spraying. division into spatially separated systems allows for central feedstock injection improved deposition rates and efficiencies. In this work, several diagnostic methods were applied to characterize jet an spray further understanding system. One important result was that temperature exhibits triple distribution straight lobes arranged around axis. As every torch, total power subject fast temporal variations. Power variations clearly seen even though it could have been anticipated characteristics natural fluctuations arcs generated by units would be less pronounced after merging streams. Unaffected nevertheless likely axially injected particles are caged effectively core jet. Hence, electrical uniformity unit’s powers must monitored realize possible degradation asymmetries distribution, may influence parameters.