TY - JOUR
T1 - Fabrication of titanium scaffolds with porosity and pore size gradients by sequential freeze casting
AU - Jung, Hyun Do
AU - Yook, Se Won
AU - Kim, Hyoun Ee
AU - Koh, Young Hag
N1 - Funding Information:
This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea.
PY - 2009/7/15
Y1 - 2009/7/15
N2 - This paper reports a novel method for producing porous Ti scaffolds with a gradient in porosity and pore size using the freeze casting method, in which TiH2/camphene slurries with various TiH2 contents (40, 25, and 10 vol.%) were cast sequentially into a mold, followed by freeze drying and heat-treatment in a vacuum at 1300 °C for 3 h. This simple sequential freeze casting method produced good bonding between the layers with different porosities of 35, 53, and 75 vol.% obtained using the TiH2 contents of 40, 25 and 10 vol.%, respectively. In addition, the pore size could be increased significantly by increasing the freezing time. The pore sizes obtained in the regions produced using 40, 25, and 10 vol.% TiH2 after freezing for 7 days were 96, 166, and 270 μm, respectively.
AB - This paper reports a novel method for producing porous Ti scaffolds with a gradient in porosity and pore size using the freeze casting method, in which TiH2/camphene slurries with various TiH2 contents (40, 25, and 10 vol.%) were cast sequentially into a mold, followed by freeze drying and heat-treatment in a vacuum at 1300 °C for 3 h. This simple sequential freeze casting method produced good bonding between the layers with different porosities of 35, 53, and 75 vol.% obtained using the TiH2 contents of 40, 25 and 10 vol.%, respectively. In addition, the pore size could be increased significantly by increasing the freezing time. The pore sizes obtained in the regions produced using 40, 25, and 10 vol.% TiH2 after freezing for 7 days were 96, 166, and 270 μm, respectively.
KW - Freeze casting
KW - Mechanical properties
KW - Metals and alloys
KW - Porosity
KW - Titanium (Ti)
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U2 - 10.1016/j.matlet.2009.04.012
DO - 10.1016/j.matlet.2009.04.012
M3 - Article
AN - SCOPUS:65549118697
SN - 0167-577X
VL - 63
SP - 1545
EP - 1547
JO - Materials Letters
JF - Materials Letters
IS - 17
ER -