| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Functional and Structural Thin Films and Coatings
|
| Presentation Title |
Calcium-phosphate Plasma Electrolytic Oxidation (PEO) Coatings on AZ31 Mg Alloy: Effects of Different Tricalcium Phosphate (TCP) Concentrations |
| Author(s) |
Navid Attarzadeh, Amir Hossein Kazemi, Maryam Molaei, Arash Fattah-alhosseini |
| On-Site Speaker (Planned) |
Navid Attarzadeh |
| Abstract Scope |
Mg alloys are highly sought-after implant materials due to their biocompatibility. However, inadequate corrosion performance hampers their applications in human body. For this study, we prepared calcium-phosphate PEO coatings on AZ31 Mg alloys in a solution containing tricalcium phosphate Ca3(PO4)2 (TCP) salt in 1, 2, 3, and 4 g/l concentrations. We studied surface morphology of coatings using FE-SEM and examined the effect of elemental compositions on corrosion performance. Coatings demonstrated a porous morphology and were composed of MgO, Ca3(PO4)2, and TCP phases. We found increasing TCP content not only increased thickness and compactness of coatings, it also modified morphology of coatings including producing narrower pores and smaller cracks. Corrosion performance was evaluated using impedance spectroscopy (EIS) after immersion in a simulated body fluid for two intervals of 1 h and 7 days. The coating with 4 g/l TCP revealed greater resistance as the appetite formation was enhanced on the coating. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Surface Modification and Coatings, Ceramics |