Fabrication of titanium scaffolds with porosity and pore size gradients by sequential freeze casting
- Authors
- Jung, Hyun-Do; Yook, Se-Won; Kim, Hyoun-Ee; Koh, Young-Hag
- Issue Date
- 15-7월-2009
- Publisher
- ELSEVIER
- Keywords
- Metals and alloys; Porosity; Mechanical properties; Titanium (Ti); Freeze casting
- Citation
- MATERIALS LETTERS, v.63, no.17, pp.1545 - 1547
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS LETTERS
- Volume
- 63
- Number
- 17
- Start Page
- 1545
- End Page
- 1547
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/119669
- DOI
- 10.1016/j.matlet.2009.04.012
- ISSN
- 0167-577X
- Abstract
- 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 degrees 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 mu m, respectively. (C) 2009 Elsevier B.V. All rights reserved.
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Collections - Graduate School > Department of Bioengineering > 1. Journal Articles
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