Dynamic freeze casting for the production of porous titanium (Ti) scaffolds

Hyun Do Jung; Se Won Yook; Tae Sik Jang; Yuanlong Li; Hyoun Ee Kim; Young Hag Koh

doi:10.1016/j.msec.2012.08.004

Dynamic freeze casting for the production of porous titanium (Ti) scaffolds

Hyun Do Jung, Se Won Yook, Tae Sik Jang, Yuanlong Li, Hyoun Ee Kim, Young Hag Koh

School of Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

75 Citations (Scopus)

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
Pages (from-to)	59-63
Number of pages	5
Journal	Materials Science and Engineering C
Volume	33
Issue number	1
DOIs	https://doi.org/10.1016/j.msec.2012.08.004
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

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msec.2012.08.004

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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.",

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AU - Li, Yuanlong

AU - Kim, Hyoun Ee

AU - Koh, Young Hag

N1 - 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) .

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N2 - 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.

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Dynamic freeze casting for the production of porous titanium (Ti) scaffolds

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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