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AC Anodizing of Pure Titanium Grade 2 with HA Nano Particle

Chambary, Ehsan | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49339 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Ghorbani, Mohammad
  7. Abstract:
  8. In this study, biocompatible ceramic coating, containing hydroxyapatite particles (HA), was successfully created by AC anodizing, on the surface of commercially pure titanium grades 2. Coating process basically consisted of three methods. In Method 1, samples were anodized in a salty electrolyte containing calcium – phosphate base and in method 2 samples were anodized as initial process, following cathodic polarisation deposition of HA particles. Finally in method 3, samples were anodized in an electrolyte containing of HA particles suspension.Parameters such as current density and time of anodizing process, in first procedure, and time of cathodic deposition process in second procedure, and the effect of different concentrations of HA Nano powder suspension in the electrolyte, in third procedure, has been investigated and analyzed.In method 1, increasing of current density from to , leads to increase in the size of the holes diameter in coating, from to and also decreasing corrosion current density from to . Increasing the process time from 7 to 10 minutes has the same effect on the current density.In method 2, after initial anodizing, by increasing the cathodic deposition operating time from 30 to 45 minutes, more HA particles participate in coatings cavities. Finally in method 3, by increasing the HA Nano powder concentration from to in the electrolyte, increasing the amounts of HA particles in coating compared to method 1 & 2, and decreasing corrosion current density from (in the case of uncoated( to )in case of adding HA) in simulated body fluid (SBF) solution
  9. Keywords:
  10. Hydroxyapatite ; Anodizing ; Biocompatibility ; Commercially Pure Titanium ; Alternating Current ; Ceramic Coating

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