METHOD FOR CREATING POROUS STRUCTURES BY PARTICLE EXPANSION

摘要

A process for producing a metal foam. The process includes mechanically working a metallic powder such that oxide particles are finely dispersed within a metallic matrix of the metallic particles that make up the metallic powder. The mechanically worked metallic powder is then annealed in a reducing atmosphere, which in turn reduces the oxide particles within the metallic particles such that H2O gas molecules (steam) are formed within the metallic matrix and intraparticle porosity is produced.

主权项

1. A process for producing a metal foam comprising:
mechanically working a metallic powder such that oxide particles are finely dispersed within a metallic matrix; and annealing the mechanically worked metallic powder in a reducing atmosphere, the annealed metallic powder having intraparticle porosity formed by chemical conversion of the oxide particles into steam.