添加 Ag、Cu 或 Ca 对可生物降解 Zn-0.8Mn 合金的微观结构和综合性能的影响。
Effects of Ag, Cu or Ca addition on microstructure and comprehensive properties of biodegradable Zn-0.8Mn alloy.
机构信息
Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, PR China; Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, PR China.
Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, PR China.
出版信息
Mater Sci Eng C Mater Biol Appl. 2019 Jun;99:969-978. doi: 10.1016/j.msec.2019.02.044. Epub 2019 Feb 16.
Zn-0.8Mn (in wt%) alloy with good ductility is used for design of novel Zn-0.8Mn-0.4x (x = Ag, Cu or Ca) alloys. Hot extrusion not only eliminates brittleness of the as-cast alloys but also significantly improves their strengths. Among them, Zn-0.8Mn-0.4Ca exhibits the highest strength, Zn-0.8Mn-0.4Ag exhibits the highest ductility, but Zn-0.8Mn-0.4Cu exhibits the best combination of strength and ductility. The minor addition of Ag, Cu or Ca accelerates alloy degradation in simulated body fluid. However, Cu addition much improves in vitro biocompatibility and endows antibacterial ability of Escherichia coli. Overall, Zn-0.8Mn-0.4Cu alloy has the best comprehensive properties.
具有良好延展性的 Zn-0.8Mn（按重量计）合金被用于设计新型 Zn-0.8Mn-0.4x（x=Ag、Cu 或 Ca）合金。热挤压不仅消除了铸态合金的脆性，而且显著提高了它们的强度。其中，Zn-0.8Mn-0.4Ca 表现出最高的强度，Zn-0.8Mn-0.4Ag 表现出最高的延展性，而 Zn-0.8Mn-0.4Cu 则表现出强度和延展性的最佳组合。Ag、Cu 或 Ca 的少量添加会加速在模拟体液中的合金降解。然而，Cu 的添加极大地提高了体外生物相容性，并赋予大肠杆菌的抗菌能力。总的来说，Zn-0.8Mn-0.4Cu 合金具有最佳的综合性能。
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