Abstract
Porous magnesium (Mg) with different overall porosities (4.1 ± 0.5, 6.1 ± 1.3,12.9 ± 3.3, and 19.0 ± 6.2%) were manufactured by powder metallurgy using polystyrene (PS) as the space holder. The samples were either hot pressed or cold pressed. Two types of PS were used to study the effect of molecular weight (Mw) of polymer space holder on properties of porous Mg. Porous Mg contained small amount of MgO. The utilization of lower Mw PS as the space holder introduced less amount of MgO into porous Mg. Average pore size increased from 2.0 ± 0.03 to 7.9 ± 3.3 µm with overall porosity increasing from 4.1 ± 0.5 to 19.0 ± 6.2%. Hardness of porous Mg decreased with overall porosity increasing. Using PS as the space holder, porous Mg by hot pressing route exhibited higher hardness than that by cold pressing route.
Published Version
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