Influence of Improved Plasma Gun on the Particle in-Flight Properties

SprayWatch-2i System designed for process control and monitoring, was used to research the properties of ZrO₂ particle in plasma sprayings with an improved plasma gun using different nozzles. The influence of spray parameters on particle velocity in plasma spraying with the improved plasma gun was studied. the results show that the particle velocity increases and exceeds the velocity of sound when using the improved plasma gun during the plasma spraying, and decreasing the aperture of the nozzle can increase the particle velocity but with the decrease of the particle temperature.