Mechanical Evaluation of Uncoated and Hyroxyapatite Coated Mg-zn/cnf Material for Biodegradable Implant Application
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Abstract
Introduction: Biodegradable metals, such as magnesium, have become promising materials for the bone healing process. However, magnesium tends to degrade rapidly and release hydrogen gas, which is toxic to the tissue environment and eventually results in a loss of strength. Thus, this study primarily aims to fabricate hydroxyapatite-coated and uncoated Mg-Zn/CNF with varying coating times and temperatures. Additionally, this study also aims to investigate the mechanical properties, microstructure, and corrosion rate of the composites. Methods: A powder metallurgy technique was used, followed by surface treatment using sol-gel and dip coating techniques. Results: The results showed that HA coated composites with immersion time of 0.5 hour have improved ultimate strength, modulus, and compressive stress at yield. Conclusion: In conclusion, Mg-Zn alloys reinforced with 2 wt.% carbon nanofibers (CNF) and coated with calcium-phosphate-based hydroxyapatite (HA) demonstrated significant potential for future use in orthopaedic implant applications.
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