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首页> 外文期刊>Journal of Materials Engineering and Performance >Electrochemical Corrosion and In vitro Biocompatibility Performance of AZ31Mg/Al2O3 Nanocomposite in Simulated Body Fluid
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Electrochemical Corrosion and In vitro Biocompatibility Performance of AZ31Mg/Al2O3 Nanocomposite in Simulated Body Fluid

机译：AZ31mg / Al2O3纳米复合材料在模拟体液中的电化学腐蚀和体外生物相容性性能

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摘要

In this present investigation, AZ31 alloy nanocomposite was prepared with the inclusion of Al2O3 nanoparticles using innovative disintegrated melt deposition (DMD) process followed by hot extrusion to improve the corrosion resistance and in vitro biocompatibility in simulated body fluid (SBF). This investigation systematically inspected the degradation performances of AZ31 alloy with Al2O3 nanoparticles through hydrogen evolution, weight loss and electrochemical methods in SBF. Further, the surface microstructure with the in vitro mineralization of the alloys in SBF was characterized by XRD, XPS, and SEM/EDS analysis. It was seen that the addition of Al2O3 nanoparticles significantly decreased the weight loss of AZ31 alloy substrates after 336 h of exposure in SBF. The corrosion resistance of the monolithic and nanocomposite samples was evaluated using potentiodynamic polarization tests, electrochemical impedance spectroscopy measurements in short- and long-term periods. Accordingly, the electrochemical analysis in SBF showed that the corrosion resistance performance of the AZ31 alloy enhanced considerably due to the incorporation of Al2O3 nanoparticles as reinforcement. Moreover, the rapid formation of bone-like apatite layer on the surface of the nanocomposite substrate demonstrated a good bioactivity of the nanocomposite samples in SBF.
机译：在本发明的研究中，使用创新的崩解熔融沉积（DMD）方法包括包含Al 2 O 3纳米颗粒，然后热挤出来制备AZ31合金纳米复合材料，以改善模拟体液（SBF）中的耐腐蚀性和体外生物相容性。该研究通过SBF中的氢进化，体重减轻和电化学方法系统地检查了AZ31合金的降解性能。此外，通过XRD，XPS和SEM / EDS分析表征了SBF中合金的体外矿化的表面微观结构。可以看出，在SBF暴露336小时后，添加Al 2 O 3纳米颗粒的加入显着降低了AZ31合金基质的重量损失。使用电位偏振试验评价整体和纳米复合材料样品的耐腐蚀性，短期和长期期间的电化学阻抗光谱测量。因此，SBF中的电化学分析表明，由于Al2O3纳米颗粒作为增强，AZ31合金的耐腐蚀性能显着增强。此外，纳米复合材料表面表面上的骨状磷灰石层的快速形成证明了SBF中纳米复合材料样品的良好生物活性。

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