MANUFACTURING METHOD OF POWDER OF METAL WITH HIGH MELTING POINT FOR THREE DIMENSIONAL PRINTING USING POWDER COMPLEXATION PROCESS AND THREE DIMENSIONAL PRINTING METHOD USING SAME

摘要

The present invention relates to a manufacturing method of powder of a metal with a high melting point for three dimensional printing using a powder complexation process, and a three dimensional printing method using the same. According to the present invention, powder of a metal with a high melting point for three dimensional printing having a two-stage structure where fine primary metal nanoparticles exist in large particles can be effectively manufactured by using a powder complexation process of spraying a suspension including one or more types of metallic precursor salts or metal particles to form liquid droplets, then spray-drying and heat-treating or spray-pyrolyzing the liquid droplets to manufacture mixed granules, and sintering the manufactured mixed granules. The powder for three dimensional printing has a structure of granules including metal nanoparticles therein. Primary metal nanoparticles of a nanoparticle size are granularized as single powder to include the fine primary metal nanoparticles to improve a sintering property. An appearance surface area of the powder is reduced to increase an overall flow of the powder. Since the strength and density of the powder are excellent by sintering the granularized powder, a property of a manufactured formed material can be improved when using the powder for three dimensional printing manufactured by the method.;COPYRIGHT KIPO 2018