The particle properties sprayed by APS of different steels composition during the flight

Thermally sprayed coatings are employed for a huge range of purposes and the coating performance depends of its morphology and lamellae properties. Lamellae are made from the impact of molten material droplets against to the substrate and their solidification. To arc spray process, the heat source is the arc electric obtained from the difference of potential between two consumable metallic wires and the transportation gas is the compressed air. The Kinect, dimensional and thermal characteristics of the droplets are responsible for the lamella geometric aspect, which can be irregular, splashing the material, or circular, and this last is called pankaque. The velocity, temperature and size of different sprayed materials - 309L, 410NiMo, E70S-6 and an experimental alloy, Fe-Mn-Cr-Si-Ni – were measured in different distances from the ASP gun. All of those had similar behavior tendencies during the flight, except the experimental alloy, which increased the droplets temperature during the travel.