Porous aluminum has a unique combination of properties.
Because of this he is a promising material for various applications. In many cases, a porous aluminum are superior to other porous materials – sintered bronze, sintered steel, porous ceramics.
Features a porous structure
Porous aluminum is manufactured through casting. The porous structure is formed after the extraction of the filler (salt) from the aluminum matrix. In the first step of salt particles fill the form for casting. Then, molten aluminum penetrates into the voids between the particles, and metal solidifies there. Liquid aluminum does not penetrate into the contact area between the salt particles. Therefore, each pore connected with all adjacent pores after salt dissolution. The filtered medium (gas or liquid) passes in any direction through these pores.
Model and photo of porous aluminum structure