ABBA Lab

Advanced Biomaterials for Biomedical Applications Lab

Journal

Fabrication of titanium scaffolds with porosity and pore size gradients by sequential freeze casting
Year
2015~
Author
Hyun-Do Jung*, Se-Won Yook, Hyoun-Ee Kim, Young-Hag Koh
Journal
Materials letters
Vol
17(63)
Page
1545-1547
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 TiH 2 /camphene slurries with various TiH 2 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 TiH 2 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.% TiH 2 after freezing for 7 days were 96, 166, and 270 μm, respectively.