Production of highly porous titanium (Ti) scaffolds by vacuum-assisted foaming of titanium hydride (TiH2) suspension

Min Kyung Ahn; In Hwan Jo; Young Hag Koh; Hyoun Ee Kim

doi:10.1016/j.matlet.2014.01.065

Production of highly porous titanium (Ti) scaffolds by vacuum-assisted foaming of titanium hydride (TiH₂) suspension

Min Kyung Ahn, In Hwan Jo, Young Hag Koh, Hyoun Ee Kim

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

20 Citations (Scopus)

Abstract

We produced highly porous titanium (Ti) scaffolds with large interconnected pores using vacuum-assisted foaming. To achieve this, a titanium hydride (TiH₂) suspension was vigorously foamed under reduced pressure, then rapidly frozen at -70 C, and finally freeze dried to remove frozen ice. The resulting green samples were heat-treated in a vacuum at 400 C for 2 h to remove the organic phases and then at 1300 C for 2 h to densify the Ti walls. Samples produced both with and without vacuum-assisted foaming showed good shape tolerance with a uniform porous structure. The samples produced using vacuum-assisted foaming had higher porosity (82±1.3 vol%) and larger pore size (150±65 μm), but lower compressive strength (8.9±1.6 MPa).

Original language	English
Pages (from-to)	228-231
Number of pages	4
Journal	Materials Letters
Volume	120
DOIs	https://doi.org/10.1016/j.matlet.2014.01.065
Publication status	Published - 2014 Apr 1

Bibliographical note

Funding Information:
This research was supported by Korea Healthcare Technology R&D Project, Ministry of Health & Welfare, Republic of Korea (contract grant number: HI11C0388).

Keywords

Biomaterials
Metals and alloys
Porous materials
Powder technology
Titanium

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2014.01.065

Cite this

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title = "Production of highly porous titanium (Ti) scaffolds by vacuum-assisted foaming of titanium hydride (TiH2) suspension",

abstract = "We produced highly porous titanium (Ti) scaffolds with large interconnected pores using vacuum-assisted foaming. To achieve this, a titanium hydride (TiH2) suspension was vigorously foamed under reduced pressure, then rapidly frozen at -70 C, and finally freeze dried to remove frozen ice. The resulting green samples were heat-treated in a vacuum at 400 C for 2 h to remove the organic phases and then at 1300 C for 2 h to densify the Ti walls. Samples produced both with and without vacuum-assisted foaming showed good shape tolerance with a uniform porous structure. The samples produced using vacuum-assisted foaming had higher porosity (82±1.3 vol%) and larger pore size (150±65 μm), but lower compressive strength (8.9±1.6 MPa).",

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author = "Ahn, {Min Kyung} and Jo, {In Hwan} and Koh, {Young Hag} and Kim, {Hyoun Ee}",

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AU - Ahn, Min Kyung

AU - Jo, In Hwan

AU - Koh, Young Hag

AU - Kim, Hyoun Ee

N1 - Funding Information: This research was supported by Korea Healthcare Technology R&D Project, Ministry of Health & Welfare, Republic of Korea (contract grant number: HI11C0388).

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AB - We produced highly porous titanium (Ti) scaffolds with large interconnected pores using vacuum-assisted foaming. To achieve this, a titanium hydride (TiH2) suspension was vigorously foamed under reduced pressure, then rapidly frozen at -70 C, and finally freeze dried to remove frozen ice. The resulting green samples were heat-treated in a vacuum at 400 C for 2 h to remove the organic phases and then at 1300 C for 2 h to densify the Ti walls. Samples produced both with and without vacuum-assisted foaming showed good shape tolerance with a uniform porous structure. The samples produced using vacuum-assisted foaming had higher porosity (82±1.3 vol%) and larger pore size (150±65 μm), but lower compressive strength (8.9±1.6 MPa).

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KW - Metals and alloys

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