Abstract
A new gas-atomization method was developed to produce metallic powders at ultralow atomizing pressures. The working gas speeds up into a venturi nozzle and aspirates the molten metal resulting in a dynamic mix and breakup of the melt into fine metallic powder. Aluminium was atomized through the flow of carbon dioxide at various pressures and the produced powders were characterized in terms of surface and volume properties to assess their purity and industrial applicability. The current nozzle configuration allowed the production of Aluminium powder with average diameter of d50=139 μm at an atomizing pressure as low as 0.5 bar. Aluminium powder production, Powder characterization, Venturi nozzle
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