Aluminium Foam: A New Friend of Environment

Metal foam is a highly porous isotropic material with cellular structure. Metal foams are light in weight and have recycling possibility, hence these are environment friendly materials. The pores of metal foam occupy more than 70% of the total volume. Metallic foams exhibit properties like good impact absorption, sound absorption and damping property due to its cellular structure. Metal foams can be prepared by many routes including casting, powder metallurgy etc. For future industrial applications it offers the combination of apparently concurrent properties in one homogeneous material, thus saving material, energy and environment. The aim of this paper is to describe various production techniques of aluminium foams along with their properties