Benner
محمود شاكر العمار ( مدرس مساعد )
كلية الهندسة - المواد
[email protected]
009647810356416
 
 
 
Effect of titanium oxide contents on the stability of HAp/TiO2 composite coating fabricated by electrophoretic deposition on 2205 duplex stainless steel for biomedical applications
بحث النوع:
هندسة التخصص العام:
Ali Sabea Hammood اسم الناشر:
Mahmood Shakir Naser اسماء المساعدين:
Elsevier الجهة الناشرة:
8th International Conference on Mechanics of Biomaterials and Tissues [email protected] Waikoloa Beach Hawaii 96738 USA  
2019 سنة النشر:

الخلاصة

This paper studies the electrophoretic deposition (EPD) technique of hydroxyapatite with different weight percent of TiO2 nanocomposite coatings on 2205 duplex stainless steel (DSS). The stability of the particles in the final suspensions containing various wt.% of TiO2 has been optimized by zeta potential test. After successful electrophoretic deposition from hydroxyapatite–titania, it was shown that suspension with 75 wt.% of hydroxyapatite and 25 wt% of titania nanoparticles has more stability than any other percent. SEM characterized the microstructure of the samples after the coating, while the elemental composition of the coating was examined using EDS. The functional groups and formed phases analyzed using FT-IR, and XRD. Then, the effects of deposition voltage and deposition time on the kinetic of EPD at 30 V with time intervals (1–4) min were identified. The corrosion behavior of all samples was tested in simulated body fluid (Ringer solution) using a potentiodynamic and cyclic polarization studies. A homogenous structure with a thin crack-free layer was obtained at EPD condition of 30 V-3 min. Moreover, the amount of porosity was minimum with the highest corrosion resistance of this coating. While the cyclic polarization results showed an improvement in the pitting corrosion resistance in the Ringer’s physiological solution and this would promote good biocompatibility for the coating.