Fabrication of titanium scaffolds with porosity and pore size gradients by sequential freeze casting

Hyun Do Jung; Se Won Yook; Hyoun Ee Kim; Young Hag Koh

doi:10.1016/j.matlet.2009.04.012

Fabrication of titanium scaffolds with porosity and pore size gradients by sequential freeze casting

Hyun Do Jung, Se Won Yook, Hyoun Ee Kim, Young Hag Koh

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

61 Citations (Scopus)

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 °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 μm, respectively.

Original language	English
Pages (from-to)	1545-1547
Number of pages	3
Journal	Materials Letters
Volume	63
Issue number	17
DOIs	https://doi.org/10.1016/j.matlet.2009.04.012
Publication status	Published - 2009 Jul 15

Bibliographical note

Funding Information:
This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea.

Keywords

Freeze casting
Mechanical properties
Metals and alloys
Porosity
Titanium (Ti)

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matlet.2009.04.012

Cite this

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title = "Fabrication of titanium scaffolds with porosity and pore size gradients by sequential freeze casting",

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 °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 μm, respectively.",

keywords = "Freeze casting, Mechanical properties, Metals and alloys, Porosity, Titanium (Ti)",

author = "Jung, {Hyun Do} and Yook, {Se Won} and Kim, {Hyoun Ee} and Koh, {Young Hag}",

note = "Funding Information: This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea.",

year = "2009",

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doi = "10.1016/j.matlet.2009.04.012",

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T1 - Fabrication of titanium scaffolds with porosity and pore size gradients by sequential freeze casting

AU - Jung, Hyun Do

AU - Yook, Se Won

AU - Kim, Hyoun Ee

AU - Koh, Young Hag

N1 - Funding Information: This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea.

PY - 2009/7/15

Y1 - 2009/7/15

N2 - 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 °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 μm, respectively.

AB - 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 °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 μm, respectively.

KW - Freeze casting

KW - Mechanical properties

KW - Metals and alloys

KW - Porosity

KW - Titanium (Ti)

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U2 - 10.1016/j.matlet.2009.04.012

DO - 10.1016/j.matlet.2009.04.012

M3 - Article

AN - SCOPUS:65549118697

SN - 0167-577X

VL - 63

SP - 1545

EP - 1547

JO - Materials Letters

JF - Materials Letters

IS - 17

ER -

Fabrication of titanium scaffolds with porosity and pore size gradients by sequential freeze casting

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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