Fabrication Process of Hybrid Porous Structured Aluminum

Abstract

Porous materials can be applied to products with variolls functions such as energy absorption systems, light we ight structures, and air/watel fiItration systems. Especially, the filtration system using the metallic membrane should have good permeability and excellent filtration efficiency. ln this study, a hybrid porous structure was created by styrofoam for macropore network and surface modification for nanoporous surface. A mixture of AI powder, styrofoam and PVP solution was formed in an Al tube and then was dried in oven at 60oC for 1 hour. Styrofoam and binder were removed at 450oC for 2 hours and were subsequent1y heated up to over 600oC. The fabricated macroporous AI body was surface - modified in dilute alkali solution with different concentrations The optical microscopy and scanning electron microscopy were employed to investigate the microstructure. The characteristics of pores were confirmed through the porosimeter and Brunaller-Emmett-Teller method