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Densification behavior and mechanical properties of biomimetic apatite nanocrystals

Eskandari, A ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.2174/157341311797483646
  3. Publisher: 2011
  4. Abstract:
  5. Nanocrystalline hydroxyapatite (nHA) of 50 nm average diameter and length to diameter ratio of >3 was synthesized by biomimetic method. Non-isothermal sintering improved densification behavior and mechanical properties of apatite to 0.88 maximum fractional density, 70MPa bending strength, 148MPa compressive strength and 2.53GPa microhardness at sintering temperature of 1250°C. Higher sintering temperatures resulted in the decomposition of the apatite and in-situ biphasic calcium phosphate HAP/TCP formation. This process lowered apatite densification and weakened mechanical properties of the sintered specimen. Transmission electron microscopy (TEM), x-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) helped to elucidate the structure/property correlations
  6. Keywords:
  7. Mechanical properties ; Average diameter ; Biomimetic apatites ; Biphasic calcium phosphates ; Densification behavior ; Field emission scanning electron microscopy ; Fractional density ; In-situ ; Length to diameter ratio ; Nanocrystallines ; Non-isothermal sintering ; Sintered specimen ; Sintering temperatures ; Bending strength ; Biomimetics ; Compressive strength ; Densification ; Density (specific gravity) ; Field emission microscopes ; Hydroxyapatite ; Scanning electron microscopy ; Sintering ; Apatite ; Biomimetic material ; Nanocrystal ; Priority journal ; Synthesis ; Temperature ; Transmission electron microscopy ; X ray diffraction
  8. Source: Current Nanoscience ; Volume 7, Issue 5 , 2011 , Pages 776-780 ; 15734137 (ISSN)
  9. URL: http://benthamscience.com/journals/current-nanoscience/volume/7/issue/5/page/776