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Fabrication of highly porous titanium (Ti) scaffolds with two interlaced periodic pores
Authors:Kwan-Ha Shin  Young-Hag Koh  Jong-Hoon Lee  Hyoun-Ee Kim
Affiliation:a Department of Dental Laboratory Science and Engineering, Korea University, Seoul, 136-703, Republic of Korea
b Department of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Republic of Korea
Abstract:This paper reports a novel type of porous titanium (Ti) scaffolds with two interlaced periodic pores that were produced by coating the surfaces of a dual-channeled hydroxyapatite (HA) scaffold, as a supporting framework, with a titanium hydride (TiH2) slurry followed by heat-treatment at 1200 °C for 3 h in a vacuum to convert TiH2 to Ti metal. This method allowed the porous Ti scaffolds to mimic the original pore structure of the dual-channeled HA scaffold in a tightly controlled manner. It was observed that the Ti layer was strongly adhered to the HA layer, owing to the diffusion of P ions into the Ti layer. The fabricated sample showed a high compressive strength of 6.0 ± 0.77 MPa and a porosity of 78 vol.% due to its unique pore structure, as well as perfect interconnections between the pores.
Keywords:Metals and alloys  Porosity  Mechanical properties  Titanium (Ti)  Hydroxyapatite (HA)
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