[T1] Powder Production

[15C-T1-09] High Efficient Industrial Laser Methods for Producing Powders

*Y. Chivel¹ (1.Merphotonics, France)

キーワード：laser, atomization, nano, micro, powders.

A process for obtaining a spherical powder in a wide size range of 50 nm - 100 μm, using conical laser beams and a continuous near-surface optical discharge with a temperature of 20 kK into which the material is introduced in the form of a wire or a powder flow has been designed. Particle condensation is strongly and rapidly quenched by the inert gas flow, resulting in high supersaturation. The efficiency of the proposed laser methods for producing powders is up to 0.5 kg/kWh.The new process of laser centrifugal atomization has been elaborated. Melting or evaporation of the end of a rotating hollow cylinder by a laser system ensures a highly efficient process for obtaining spherical powder in the nano and micro size range with productivity up to 500 kg/h at laser power 160 kW.