Fabrication and mechanical properties of porous Ti/HA composites for bone fixation devices

Naoyuki Nomura, Kozue Sakamoto, Katsuya Takahashi, Seiji Kato, Yasunori Abe, Hisashi Doi, Yusuke Tsutsumi, Masahiro Kobayashi, Equo Kobayashi, Woo Jong Kim, Kyo Han Kim, Takao Hanawa

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Porous Ti (pTi)/hydroxylapatite (HA) composites were fabricated by an infiltration method in a vacuum and sintering. The Young's modulus of the composites was evaluated before and after the immersion in Hanks' solution. The strength of the composites was also evaluated by four-point bending test. The Young's modulus of the compacts was governed by the porosity and was comparable to the human bone in the porosity range from 24 to 34%. The Young's modulus of sintered pTi/HA composites was larger than that of pTi. The Young's modulus of the sintered pTi/HA composites decreased after immersion in Hanks' solution. The proof and bending strengths of the sintered pTi/HA composites were larger than those of pTi. Solid solution hardening of Ti by oxygen contributed the increase of the proof strength.

Original languageEnglish
Pages (from-to)1449-1454
Number of pages6
JournalMaterials Transactions
Volume51
Issue number8
DOIs
Publication statusPublished - 2010 Aug

Keywords

  • Composites
  • Hydroxylapatite (ha)
  • Porous titanium compacts
  • Young's modulus

ASJC Scopus subject areas

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

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