【摘 要】
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Magnesium has attracted much attention as a class of biodegradable metallic biomaterials. However, the corrosion resistance and biocompatibility still need to be improved according to clinical demands
【机 构】
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School of Energy Science and Engineering, University of Electronic Science and Technology of China.6
【出 处】
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第十一届全国表面工程大会暨第八届全国青年表面工程学术会议
论文部分内容阅读
Magnesium has attracted much attention as a class of biodegradable metallic biomaterials. However, the corrosion resistance and biocompatibility still need to be improved according to clinical demands for bone implants. In this present study, hydroxyapatite containing ceramic coatings are prepared on AZ31 magnesium alloy by microarc oxidation technique in an alkali electrolyte consisting of different calcium glycerophosphate (CaGP) concentration. The coating thickness, roughness, morphology and composition are all dependent on the concentration of CaGP, which determines the protective ability for magnesium alloy. The electrochemical tests demonstrated that the MAO coatings improved the corrosion resistance of AZ31 Mg magnesium. All the coatings showed a bonding strength higher than 35 MPa, and the MAO samples showed a longer wear life compared to the substrate. A hydroxyapatite containing coating with good combination of corrosion resistance, bonding strength and wear behavior could be obtained by adjusting CaGP concentration in the electrolyte solution.
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