title: Effects of compaction pressure and particle shape on the porosity and compression mechanical properties of sintered Ti6Al4V powder compacts for hard tissue implantation.
abstract: Sintered Ti6Al4V powder compacts potentially to be used in implant applications were prepared using commercially available spherical and angular powders (100-200 mum) within the porosity range of 34-54%. Cylindrical green powder compacts were cold compacted at various pressures and then sintered at 1200 degrees 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 degrees to the loading axis.
authors: Department of Mechanical Engineering, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir, Turkey. mustafaguden@iyte.edu.tr
authors: Mustafa
authors: M
authors: Güden
authors: Emrah
authors: E
authors: Celik
authors: Alpay
authors: A
authors: Hizal
authors: Mustafa
authors: M
authors: Altindiş
authors: Sinan
authors: S
authors: Cetiner
mesh_terms: D000497:Alloys; D001672:Biocompatible Materials; D019245:Compressive Strength; D008422:Materials Testing / Q000379:methods; D016062:Porosity; D011208:Powders; D011312:Pressure; D019736:Prostheses and Implants; D014025:Titanium
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; D011208:Powders; C031462:titanium alloy (TiAl6V4); D014025:Titanium