De-alloying of rapidly solidified amorphous and crystalline alloys

▶ Porous Au of sub-micron size obtained by de-alloying of a glassy alloy. ▶ Role of the critical potential and surface roughness in de-alloying. ▶ Porous Fe by selective removal of a phase from rapidly solidified Fe-C eutectics. ▶ Pore size can be tailored by controlling the grain size.