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2016 | 129 | 4 | 665-668
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Apatite Wollastonite-Reinforced Hydroxyapatite Biocomposites

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The paper is focused on the reinforcement of hydroxyapatite (HA) by apatite wollastonite (AW) because of its aptitude for combining biocompability with mechanical properties superior to those of the bone. HA powders were produced by thermal extraction technique involving calcination from natural source. HA-AW_{P} biocomposites containing from 0 to 20 wt.% of AW in particulate form were prepared starting with wet ball milling during 24 h, followed by powder metallurgical processes using HA powders calcined at 800°C, followed by compaction by cold pressing and by cold isostatical pressing at 250 MPa and subsequent sintering at 1100-1300°C. The phases and compositions in the resulting products were identified by XRD and XRF. Reinforcement particle distribution were investigated on polished surfaces of the sintered samples by SEM analysis and by optical microscopy. Mechanical properties of the sintered samples was evaluated via Micro Vickers hardness testing.
  • Sakarya University, Faculty of Technology, Department of Metallurgical and Materials Engineering, Sakarya University, 54187, Sakarya, Turkey
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