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 journalArticle

43 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 languageEnglish
Pages (from-to)1545-1547
Number of pages3
JournalMaterials Letters
Volume63
Issue number17
DOIs
Publication statusPublished - 2009 Jul 15

Keywords

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

ASJC Scopus subject areas

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

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