Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran.
Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran.
J Mech Behav Biomed Mater. 2023 May;141:105784. doi: 10.1016/j.jmbbm.2023.105784. Epub 2023 Mar 15.
In this research, a composite coating with AlO and ZrO particles have been applied on AZ31 magnesium alloy by micro-arc oxidation (MAO) technique. The alkaline electrolyte included a constant based composition and different composition of the AlO and ZrO additives. Microstructure observations reveal that the surface pores of composite coating reduced during addition of ZrO and AlO ceramic particles. The hardness of coating increased from about 380 for non-added to 620 MPa for AlO+ZrO added coating and wear rate reduced about 8 times. Wettability of the coating increased by incorporation of AlO and/or ZrO particles while, AlO is more effective than ZrO. Addition of the ceramic particles enhanced the hydrophilicity properties of surface in wettability test and a contact angle of 43° was obtained for coating including AlO+ZrO. The antibacterial properties of MAO coatings showed that S. aureus bacterium is more sensitive to the zirconia and alumina particle than S. typhimurium bacterium after 24 h of incubation.
在这项研究中，通过微弧氧化 (MAO) 技术在 AZ31 镁合金上应用了具有 AlO 和 ZrO 颗粒的复合涂层。碱性电解液包含固定的基础成分和不同成分的 AlO 和 ZrO 添加剂。微观结构观察表明，在添加 ZrO 和 AlO 陶瓷颗粒后，复合涂层的表面孔隙减少。涂层的硬度从未添加时的约 380 MPa 增加到添加 AlO+ZrO 时的 620 MPa，磨损率降低了约 8 倍。通过添加 AlO 和/或 ZrO 颗粒提高了涂层的润湿性，而 AlO 的效果优于 ZrO。陶瓷颗粒的添加增强了表面润湿性测试中的亲水性，对于包含 AlO+ZrO 的涂层，接触角为 43°。MAO 涂层的抗菌性能表明，在孵育 24 小时后，金黄色葡萄球菌对氧化锆和氧化铝颗粒比鼠伤寒沙门氏菌更敏感。
