Loading...

MAO-derived hydroxyapatite-TiO 2 nanostructured bio-ceramic films on titanium

Abbasi, S ; Sharif University of Technology | 2012

1540 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.materresbull.2012.07.014
  3. Publisher: 2012
  4. Abstract:
  5. Micro Arc Oxidation (MAO) process was utilized to fabricate nano bioceramic TiO 2-hydroxyapatite coatings on titanium substrates. Samples were produced in electrolytes contained 1 g/l β-glycerophosphate and 5, 10 and 15 g/l calcium acetate for 3, 6 and 10 min at 350 V. The techniques including XRD, XPS, SEM, FESEM and EDX were employed to study the effect of processing parameters. Hydroxyapatite, anatase, α-tri calcium phosphate and calcium titanate phases as well as 30-60 nm-size crystals were detected in the coating layer. It was also observed that the pore volume would increase by increasing the electrolyte concentration. The growth time was also found to influence the total pore volume. Furthermore, the individual pore sizes would also be increased as the arcing time increased. By increasing the electrolyte concentration and growth time, the rougher surface layers were obtained. Depending on the growth time and electrolyte concentration, pore size and density were measured 0.303-1.77 μm and 10.7-17.3%, respectively
  6. Keywords:
  7. A. Composites ; A. Nanostructures ; A. Thin films ; C. Photoelectron spectroscopy ; Arcing time ; Calcium acetate ; Calcium titanate ; Coating layer ; Electrolyte concentration ; Glycerophosphate ; Growth time ; Hydroxyapatite coating ; Microarc oxidation ; Nano-structured ; Pore volume ; Processing parameters ; Surface layers ; TiO ; Titanium substrates ; Total pore volume ; Tri-calcium phosphates ; XRD ; Calcium phosphate ; Coatings ; Electrolytes ; Hydroxyapatite ; Phospholipids ; Photoelectron spectroscopy ; Pore size ; Titanium dioxide
  8. Source: Materials Research Bulletin ; Volume 47, Issue 11 , 2012 , Pages 3407-3412 ; 00255408 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0025540812005454