Plasma electrode-type plasma spray gun—effect of powder loading on the behavior of plasma jet

Abstract

A newly designed plasma electrode-type plasma spray gun, which can generate a high temperature and clean plasma jet and inject various materials into the center of the arc column, has been developed. In order to demonstrate the application feasibility of this new-type plasma spray gun for thermal plasma processing, the effects of powder loading on the stability and temperature of the plasma jet and on the electrode spot were studied. It was clarified that with powder loading, the plasma jet was very stable and not contaminated by electrode materials, i.e. clean, and the extent of the jet temperature decrease was a little, i.e. about 1000 K.