Effects of compaction pressure and particle shape on the porosity and compression mechanical properties of sintered Ti6Al4V powder compacts for hard tissue implantation

Mustafa Güden, Emrah Çelik, Alpay Hizal, Mustafa Altindiş, Sinan Çetiner

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Sintered Ti6Al4V powder compacts potentially to be used in implant applications were prepared using commercially available spherical and angular powders (100-200 μm) within the porosity range of 34-54%. Cylindrical green powder compacts were cold compacted at various pressures and then sintered at 1200°C for 2 h. The final percent porosity and mean pore sizes were determined as functions of the applied compaction pressure and powder type. The mechanical properties were investigated through compression testing. Results have shown that yield strength of the powder compacts of 40-42% porosity was comparable with that of human cortical bone. As compared with previously investigated Ti powder compacts, Ti6Al4V powder compacts showed higher strength at similar porosity range. Microscopic observations on the failed compact samples revealed that failure occurred primarily by the separation of interparticle bond regions in the planes 45° to the loading axis.

Original languageEnglish (US)
Pages (from-to)547-555
Number of pages9
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume85
Issue number2
DOIs
StatePublished - May 1 2008

Keywords

  • Compression
  • Mechanical properties
  • Porous
  • Titanium (alloys)

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering

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