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Fabrication of porous magnesium with directional pores through use of hydrogen thermally decomposed from MgH2 powders during unidirectional solidification

Published online by Cambridge University Press:  31 January 2011

Masakazu Tane  and
Hideo Nakajima
Masakazu Tane*
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
Hideo Nakajima
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
*
a)Address all correspondence to this author. e-mail: mtane@sanken.osaka-u.ac.jp
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Abstract

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.

Keywords

PorosityMgCellular (material type)
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 3 , March 2008 , pp. 849 - 855
Copyright
Copyright © Materials Research Society 2008

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References

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