Journal
JOURNAL OF MATERIALS RESEARCH
Volume 23, Issue 3, Pages 849-855Publisher
MATERIALS RESEARCH SOC
DOI: 10.1557/JMR.2008.0105
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Porous magnesium with directional cylindrical pores (or lotus-type porous magnesium) was fabricated through the use of hydrogen decomposed from MgH2 powders during unidirectional solidification. Liquid magnesium was cast into a mold in which MgH2 powders were placed and was unidirectionally solidified, which achieved growth of pores elongated along the direction of solidification. The effect of the amount of the MgH2 powders on the pore structure (porosity, diameter, and number density of pores) and the change in the pore structure along the pore growth direction were clarified. The porosity and number density of pores increase with increasing amount of MgH2 powder, and the average diameter of pores decreases with increasing amount of MgH2 powder. The pore structure changes with the growth of pores along the solidification direction.
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