Fabrication of Porous and Nanoporous Aluminum via Selective Dissolution of Al-Zn Alloys
Figure 7
Al-25 at.% Zn alloy quenched into liquid nitrogen and electrochemically corroded in HNO3. (a) Typical microstructure morphology after selective dissolution. (b) Roughness observed in walls suggests presence of secondary porosity. (c) Resulting morphology of dendrite walls. (d) Higher magnification of image. (c) An interconnected ligament network with nanosized pores can be observed.
