Evaluation of corrosion resistance of bi-layered plasma-sprayed coating on titanium implants
محل انتشار: ماهنامه بین المللی مهندسی، دوره: 35، شماره: 4
سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 289
فایل این مقاله در 9 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_IJE-35-4_007
تاریخ نمایه سازی: 28 دی 1400
چکیده مقاله:
There are several attempts to improve surface characteristics of biomaterials with thick film coatings. In this research, a class of protective coating layers of bi-layered Hydroxyapatite (HA)/Al۲O۳-SiO۲ (with ۱۰, ۲۰, ۳۰ %wt SiO۲) were deposited on titanium (Ti) surfaces by plasma spray technique. The surface features of the applied coating layers were evaluated in detail to confirm the effectiveness of the technique for further biomedical applications. The results demonstrated that uniform and bi-layered plasma sprayed coatings can be successfully prepared through the optimization of engineering parameters. Also, it was found that the roughness of the bi-layered coatings increases with increasing the number of coating layers. The corrosion behavior of the coated and uncoated samples was comparatively investigated using electrochemical tests. The current density (icorr) was measured ۰.۲۷μA/cm۲, ۰.۲۸ μA/cm۲, ۰.۲۳ μA/cm۲, ۰.۷۹ μA/cm۲ for HA, (HA)/Al۲O۳-SiO۲ (with ۱۰, ۲۰, ۳۰ %wt SiO۲), respectively. According to the results, corrosion resistance of samples with ۲۰% SiO۲ is significantly improved compared to the single-layer HA and bare Ti. The outcomes of FESEM results revealed that porosity and cavities related to evaporation of adhesive PVA and it is confirmed by increasing the percentage of silica to more than ۲۰%, porosity has increased. In conclusion, the proposed coating system showed promising abilities for future biomedical applications. It could be optimized and improved by changing the structural characteristics of the substrate, chemical composition and porosity of the coating layers.
کلیدواژه ها:
نویسندگان
Nasrin Ebrahimi
Materials and Energy Research Center, P.O. Box ۳۱۷۸۷-۳۱۶, Karaj, Iran
Ali Sedaghat Ahangari Hossein Zadeh
Materials and Energy Research Center
Mohammadreza Vaezi
Materials and Energy Research Center, P.O. Box ۳۱۷۸۷-۳۱۶, Karaj, Iran
Masoud Mozafari
Materials and Energy Research Center, P.O. Box ۳۱۷۸۷-۳۱۶, Karaj, Iran