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Nozzle for Fine Particle Production

Ames Laboratory

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Technology Marketing Summary

Researchers at Iowa State University and Ames Laboratory have developed an improved high pressure gas atomizing nozzle that can be used for the production of metal powders.


High pressure gas atomizing (HPGA) nozzles have shown promise for applications such as the production of very fine metal and alloy powders.  ISU scientists have now developed an improved HPGA nozzle that enables increased gas kinetic energy to be delivered to the molten material being atomized.  Through its configuration of multiple gas microdischarge openings or passages, the improved HPGA nozzle is able to generate supersonic atomizing gas velocity at lower gas manifold pressure compared to other systems.  As a result, the yield and efficiency of ultra-fine metal powders produced by gas atomization is enhanced.  Finer particle distribution is also achieved since the deviation of the particle size produced is reduced when this nozzle is used.

• Efficient (the ISU HPGA nozzle is better at generating supersonic gas with higher kinetic energy than other HPGA nozzles)
• Effective (particle size distribution is narrow)
Applications and Industries

Production of ultra-fine metal powder

More Information

ISURF Direct Link:

Publication(s):  “Progress Towards Gas Atomization Processing with Increased Uniformity and Control”, Iver E. Anderson and Robert L. Terpstra, 2002, Mat. Sci. and Eng. A236:101-109.

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Patent 6,142,382
Atomizing nozzle and method
A high pressure close-coupled gas atomizing nozzle includes multiple discrete gas jet discharge orifices having aerodynamically designed convergent-divergent geometry with an first converging section communicated to a gas supply manifold and to a diverging section by a constricted throat section to increase atomizing gas velocity. The gas jet orifices are oriented at gas jet apex angle selected relative to the melt supply tip apex angle to establish a melt aspiration condition at the melt supply tip.
Ames Laboratory 11/07/2000
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated

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To: Craig Forney<>