Abstract：
:Highly porous titanium with aligned large pores up to 500 μm in size, which is suitable for scaffold applications, was successfully fabricated using the reverse freeze casting method. In this process we have newly developed, the Ti powders migrated spontaneously along the pre-aligned camphene boundaries at a temperature of 45.5°C and formed a titanium-camphene mixture with an aligned structure; this was followed by freeze drying and sintering. As the casting time increased from 24 to 48 h, the initial columnar structures turned into lamellar structures, with the porosity decreasing from 69 to 51%. This reduction in porosity caused the compressive yield strength to increase from 121 to 302 MPa, with an elastic modulus of the samples being in the range of 2-5 GPa. In addition, it was demonstrated that reverse freeze casting can also be successfully applied to various other raw powders, suggesting that the method developed in this work opens up new avenues for the production of a range of porous metallic and ceramic scaffolds with highly aligned pores.
journal_name
Acta Biomaterjournal_title
Acta biomaterialiaauthors
Yook SW,Jung HD,Park CH,Shin KH,Koh YH,Estrin Y,Kim HEdoi
10.1016/j.actbio.2012.03.020subject
Has Abstractpub_date
2012-07-01 00:00:00pages
2401-10issue
6eissn
1742-7061issn
1878-7568pii
S1742-7061(12)00106-7journal_volume
8pub_type
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