图2. 文献报道的医用锌合金室温下老化性能测试结果^[37]，及作者所在课题组研发的可降解Zn-Cu合金抗老化性能测试结果对比。图2a中显示Zn-Mg合金^[37]刚制备出来时拉伸延伸率为30%，室温下存放1 a后急剧降至4%，表现出严重的老化特性；而本课题组研发的专利Zn-Cu合金，刚制备出的拉伸延伸率与室温存放20个月后延伸率几乎一样(均为58%左右)，表现出优异的抗老化性能和变形能力

Fig.2. Test results reported about self-ageing performance of medical zinc alloys at room temperature (a)^[37] compared with those of degradable Zn-Cu alloys developed by our research team (b) (Fig.2a shows that the tensile elongation of the Zn-Mg alloy^[37] was 30% when it was newly made, and dropped sharply to 4% after one year's storage at room temperature, indicating obvious self-ageing characteristics. While the patent Zn-Cu alloy developed by our team showed almost the same tensile elongation of 58% after 20 months' storage at room temperature, showing excellent anti-ageing and deformability)