Fabrication of porous titanium scaffold with controlled porous structure and net-shape using magnesium as spacer

Sung Won Kim, Hyun Do Jung, Min Ho Kang, Hyoun Ee Kim, Young-Hag Koh, Yuri Estrin

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

This paper reports a new approach to fabricating biocompatible porous titanium with controlled pore structure and net-shape. The method is based on using sacrificial Mg particles as space holders to produce compacts that are mechanically stable and machinable. Using magnesium granules and Ti powder, Ti/Mg compacts with transverse rupture strength (∼ 85 MPa) sufficient for machining were fabricated by warm compaction, and a complex-shape Ti scaffold was eventually produced by removal of Mg granules from the net-shape compact. The pores with the average size of 132-262 μm were well distributed and interconnected. Due to anisotropy and alignment of the pores the compressive strength varied with the direction of compression. In the case of pores aligned with the direction of compression, the compressive strength values (59-280 MPa) high enough for applications in load bearing implants were achieved. To verify the possibility of controlled net-shape, conventional machining process was performed on Ti/Mg compact. Compact with screw shape and porous Ti scaffold with hemispherical cup shape were fabricated by the results. Finally, it was demonstrated by cell tests using MC3T3-E1 cell line that the porous Ti scaffolds fabricated by this technique are biocompatible.

Original languageEnglish
Pages (from-to)2808-2815
Number of pages8
JournalMaterials Science and Engineering C
Volume33
Issue number5
DOIs
Publication statusPublished - 2013 Jul 1

Fingerprint

Compressive Strength
Titanium
Scaffolds
spacers
Magnesium
magnesium
titanium
Fabrication
fabrication
Compressive strength
Anisotropy
Machining
Weight-Bearing
Bearings (structural)
Powders
porosity
Rupture
compressive strength
Pore structure
machining

Keywords

  • Complex shape
  • Magnesium
  • Porous metal
  • Space holder method
  • Titanium

ASJC Scopus subject areas

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

Cite this

Fabrication of porous titanium scaffold with controlled porous structure and net-shape using magnesium as spacer. / Kim, Sung Won; Jung, Hyun Do; Kang, Min Ho; Kim, Hyoun Ee; Koh, Young-Hag; Estrin, Yuri.

In: Materials Science and Engineering C, Vol. 33, No. 5, 01.07.2013, p. 2808-2815.

Research output: Contribution to journalArticle

Kim, Sung Won ; Jung, Hyun Do ; Kang, Min Ho ; Kim, Hyoun Ee ; Koh, Young-Hag ; Estrin, Yuri. / Fabrication of porous titanium scaffold with controlled porous structure and net-shape using magnesium as spacer. In: Materials Science and Engineering C. 2013 ; Vol. 33, No. 5. pp. 2808-2815.
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