METHOD FOR PREPARING MICROMETER AND NANOMETER COMPOSITE METALLIC SPHERICAL POWDER HAVING CORE-SHELL STRUCTURE

摘要

A method for preparing micrometer and nanometer composite metallic spherical powder having a core-shell structure, comprising the following steps: (1) preparing a composite metallic powder precursor; (2) preparing the powder uniformly mixed with the composite metallic powder precursor and carbon material powder or ceramic material powder; (3) melting one of the metals in the composite metallic precursor via a heat treatment at high temperature, and forming a composite metallic ball having the core-shell structure after solidification; (4) removing the carbon material powder or the ceramic material powder to obtain the micrometer and the nanometer composite metallic spherical powder having the core-shell structure.