《Table 4 Summary of the mechanical and corrosion behavior of reported Mg-Li based alloys for biomedi

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《镁锂钙合金作为骨植入材料的体内外研究（英文）》

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Upon examination of the results presented herein，it is clear that both Li and Ca strongly influence the mechanical and corrosion behavior of the alloys.Table 4summarizes the mechanical and corrosion behavior of recently reported Mg-Li based alloys developed for biomedical applications，against pure Mg used as a comparison.The addition of Li leads to large variations in mechanical properties and elongation，which makes it possible to tailor the mechanical properties of the alloys for different target applications.It is well documented that the addition of Li influences the crystal structure of Mg-Li based alloys[34].According to the summary，generally，the addition of Li results in less strength but higher elongation，while the addition of other alloying elements can increase strength due to solid solution strengthening and precipitation strengthening effects.In our study，we chose the most naturally abundant metallic element in the human body，Ca，with a view to improving implant mechanical performance，while minimizing adverse effects[22].As biodegradable metals，current MgLi-Ca alloys especially the Mg-3.5Li-0.5Ca and Mg-3.5Li-1.0Ca show favorable degradation qualities and comparable corrosion behavior，when compared to pure Mg counterparts.Furthermore，the reported Li2CO3protective layer provides an alternative strategy to other biodegradable Mg alloys to achieve better corrosion resistance[9，22，24].