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Double layer bioglass-silica coatings on 316L stainless steel by sol-gel method

Pourhashem, S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ceramint.2013.06.096
  3. Abstract:
  4. The application of bioglass coatings on metallic implants provides link between bone and materials and prevents corrosion of metallic implants in body fluid. Therefore, in this research, 45S5 bioglass-silica coatings on 316L stainless steel were prepared by the sol-gel method and were characterized by different techniques. According to X-ray diffraction (XRD) results, by sintering 45S5 bioglass at 600 C for 5 h, coatings containing both amorphous phase and Na2Ca2Si3O9 crystalline phase were obtained. Scanning electron microscopy (SEM) results showed that coatings prepared via appropriate sol aging and substrate preparations are crack-free. Potentiodynamic polarization tests in simulated body fluid (SBF) showed that coatings improve corrosion resistance of substrates, significantly. Further, bioactivity was considered during 30 days of immersion in SBF at 37 C by atomic absorption spectroscopy (AAS), XRD, SEM and potentiodynamic polarization tests that demonstrated the growth of amorphous apatite, hydroxyapatite (HA) and CaSiO3 film on coatings
  5. Keywords:
  6. C. Corrosion ; Bioglass ; SiO2 ; Coating ; 316L stainless steel ; Sol–gel
  7. Source: Ceramics International ; Volume 40, Issue 1, Part A , January 2014 , Pages 993–1000
  8. URL: http://www.sciencedirect.com/science/article/pii/S0272884213007712