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Single and double stage sintering of mechanically alloyed powder for nanostructured Ti6Al4V foams usable in cancellous scaffolds

Sadrnezhaad, S. K ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1179/1749514813Z.00000000052
  3. Publisher: 2013
  4. Abstract:
  5. Mechanical alloying and sintering were used to fabricate nanostructured Ti6Al4V scaffolds of highly controllable pore geometry and fully interconnected porous network. Elemental powders were milled for different periods of time (10, 20, 30, 40 and 60 h), mixed with 40-60 vol.-% of 200-400 μm cuboidal NaCl, compacted at 500-600 MPa and sintered according to single or double stage heat treatment regimes at 790 and 950°C under vacuum. After sintering, the samples were soaked in distilled water to washout the NaCl. Foamy microstructures were obtained showing well shaped biopores and fragmentary embedded micropores. The shape of initial NaCl was copied into the biopores which had highly interconnected architecture considered suitable for cancellous bone tissue adherence and cell culture
  6. Keywords:
  7. Dental alloy ; Nano-structured ; Nanoparticle ; Titanium alloy ; Cancellous bone ; Controllable pore geometry ; Distilled water ; Double-stage sintering ; Elemental powders ; Mechanically alloyed powder ; Biomimetic material ; Porous networks ; Biomimetic materials ; Cell culture ; Dental alloys ; Mechanical alloying ; Nanoparticles ; Powders ; Tissue ; Titanium alloys ; Sintering
  8. Source: International Heat Treatment and Surface Engineering ; Volume 7, Issue 1 , 2013 , Pages 43-48 ; 17495148 (ISSN)
  9. URL: http://www.maneyonline.com/doi/abs/10.1179/1749514813Z.00000000052