Abstract
This paper proposes dynamic freeze casting as a new manufacturing technique for producing porous Ti scaffolds with a uniform porous structure and good ductility. In this method, Ti/camphene slurries with various initial Ti contents (15, 20, and 25 vol.%) were frozen at 44 °C for 12 h in rotation, which allowed for the extensive growth of camphene crystals and the uniform construction of walls made of Ti particles. All the fabricated samples showed spherical-like pores surrounded by dense Ti walls that were uniformly formed after sintering at 1300 °C for 2 h in a vacuum. The porosity decreased from 71 to 52 vol.% with an increase in Ti content from 15 to 25 vol.%, whereas the pore size decreased from 362 to 95 μm. On the other hand, the compressive strength and stiffness increased considerably from 57 ± 4 to 183 ± 6 MPa and from 1.3 ± 0.5 to 5.0 ± 0.8 GPa, respectively, due to the decrease in the porosity of the samples.
Original language | English |
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Pages (from-to) | 59-63 |
Number of pages | 5 |
Journal | Materials Science and Engineering C |
Volume | 33 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2013 Jan 1 |
Bibliographical note
Funding Information:This research was supported by the WCU (World Class University) project through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology ( R31-2008-000-10075-0 ) and by the Technology Innovation Program (Contract No. 10037915 , WPM Biomedical Materials – Implant Materials) funded by the Ministry of Knowledge Economy (MKE, Korea) .
Keywords
- Freeze casting
- Mechanical properties
- Porous metal
- Titanium
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering