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

Biomedical Chemical Engineering

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

83 Scopus citations

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
State	Published - 1 Jan 2013

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

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10.1016/j.msec.2012.08.004

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title = "Dynamic freeze casting for the production of porous titanium (Ti) scaffolds",

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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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) .",

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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.

AB - 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

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