Method for making metal powders

摘要

A metal powder is produced by atomizing molten metal in an electric arc spray gun and rapidly quenching the resulting droplets in a liquid cryogen to form fine, highly spherical, oxide-free particles. The rapid quenching yields particles with a very fine, uniform microstructure which melt rapidly and uniformly when later heated. The powder is especially well-suited for making solder paste for device fabrication in the electronics industry.