Hello, i think you can use mechanical methods, for example: grinding, milling

see this patent --> attach 

Electric explosion of wire is suitable for making nanopowders of alloys

thank you arezoo sh.dadkhah.

I think that Ms. Dadkhah has a point. There might be many methods to produce micro-scale powder, while the most practical methods would be mechanical ones. Nonetheless, grinding is not suitable because the resulted powder will be contaminated by the grinder’s material, e.g. if you use SiC sand paper to chip off the powder, there is high probability that the produced powder has some SiC particles.

I suggest that you use machining – turning – to produce macro-scale chips. Then, carefully wash the macro-scale chips by ethanol or acetone. Use high energy milling methods – high speed ball milling – to produce the powder as fine as you want.

Note: Although improbable, if the produced powder is attached, cold welded, to the milling vessel, you may want to add up to 5 %wt. stearic acid to the milling materials.

Dear Amir,

Use Polyvinyl Alcohol (PVA) to improve oxidation resistance of the bronze powders during milling process and Hexane can be added to powder as a surfactant to limit cold welding (6 to 6.5 ml)

This powder is typically water atomized. See for instance the books of R.M. German on powder metallurgy.