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Synthesis and characterisation of β-tricalcium phosphate coating on zirconia toughened alumina by biomimetic method

Esfahani, H ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1179/1743676112Y.0000000062
  3. Publisher: 2013
  4. Abstract:
  5. The present work studied bioactive coatings on the surface of ceramic biomaterials. Zirconia toughened alumina (ZTA) composites containing 15 mol.-%. Partially stabilised zirconia was prepared after 1 h sintering at 1550°C. Apatite layers were then coated onto the surfaces of composites by the biomimetic method using 1·5-2 multiply concentrations of simulated body fluid (SBF). Before treatment in SBFs, a sodium silicate layer was employed as nucleating agent to induce the formation of a calcium phosphate layer. The effect of immersion time on the morphology of the precipitate was monitored with a scanning electron microscope. X dot maps revealed that there is a relationship between distribution of Ca-P and ZTA surface. X-ray diffractometry patterns, calcium/phosphor molar ratio and Fourier transform infrared spectroscopy showed that β-tricalcium phosphate and calcium deficient hydroxyapatite precipitated onto substrates via biomimetic. The thin film X-ray diffraction pattern showed that the calcium deficient hydroxyapatite decomposed into β-tricalcium phosphate and CaO after 0·5 h of heat treatment at 700°C
  6. Keywords:
  7. β-TCP ; Biomimetic ; Bioactive coatings ; Calcium deficient hydroxyapatite ; Simulated body fluids ; Sodium silicate ; Thin film x-ray diffractions ; Tri-calcium phosphates ; Zirconia toughened alumina ; Biological materials ; Biomaterials ; Biomimetics ; Calcium ; Fourier transform infrared spectroscopy ; Growth (materials) ; Hydroxyapatite ; Nucleation ; Phosphate coatings ; Phosphate minerals ; Scanning electron microscopy ; Silicon compounds ; Sintering ; X ray diffraction ; X ray diffraction analysis ; Zirconia ; Biomimetic processes
  8. Source: Advances in Applied Ceramics ; Volume 112, Issue 3 , 2013 , Pages 140-145 ; 17436753 (ISSN)
  9. URL: http://www.maneyonline.com/doi/abs/10.1179/1743676112Y.0000000062