Directional solidification of metal-gas eutectic and fabrication of regular porous metals

Abstract

Directional solidification of metal-gas eutectic (Gasar) is a novel process for making regular porous metals. This process is based on a solid-gas eutectic reaction involving a gaseous medium and a metal or ceramic phase. The process easily controls the porosity, the pore size, the pore orientation, and the pore morphology when the melting and solidifying conditions are varied in a wide range. The latest progress and our research work are reviewed in this paper.

Keywords

metal-gas eutectic, unidirectional solidification, Gasar process, porous metals