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<p>Zn-1.5 wt% Mg alloys are promising biodegradable implant materials due to their enhanced corrosion resistance. This study examined the effects of copper (Cu) micro-alloying on Zn-1.5&#xa0;Mg alloys produced via melt casting. The alloys exhibited a primary α-Zn phase and a Mg<sub>2</sub>Zn<sub>11</sub> phase, with SEM revealing micro-needle structures (32.6–56.4&#xa0;µm). Electrical conductivity ranged from 1.01 × 10<sup>9</sup>–5.99 × 10<sup>9</sup> S/m, with Zn-1.5&#xa0;Mg-0.12Cu showing the highest value, suitable for cardiovascular use. All alloys were hydrophilic, with contact angles below 90°, ensuring good liquid interaction. Zn-1.5&#xa0;Mg-0.9Cu demonstrated the lowest corrosion rate (0.038&#xa0;mm/year) and the highest hardness (452.8 Hv), making it the most durable and mechanically robust. These findings highlight Zn-1.5&#xa0;Mg-0.9Cu as a superior candidate for biomedical implants, particularly in orthopedics.</p> Graphical abstract <p>Synthesis and characterization of biomedical implant</p>

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Effects of copper micro-alloying on the degradation behavior, microstructure, and mechanical properties of Zn-1.5%Mg biodegradable alloys for implant applications

  • 期刊论文

  • 发表日期：

    2025年3月11日

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  • Hina Imtiaz,
  • Madeeha Riaz,
  • Etrat Anees,
  • Farooq Bashir,
  • Tousif Hussain

摘要

Zn-1.5 wt% Mg alloys are promising biodegradable implant materials due to their enhanced corrosion resistance. This study examined the effects of copper (Cu) micro-alloying on Zn-1.5 Mg alloys produced via melt casting. The alloys exhibited a primary α-Zn phase and a Mg2Zn11 phase, with SEM revealing micro-needle structures (32.6–56.4 µm). Electrical conductivity ranged from 1.01 × 109–5.99 × 109 S/m, with Zn-1.5 Mg-0.12Cu showing the highest value, suitable for cardiovascular use. All alloys were hydrophilic, with contact angles below 90°, ensuring good liquid interaction. Zn-1.5 Mg-0.9Cu demonstrated the lowest corrosion rate (0.038 mm/year) and the highest hardness (452.8 Hv), making it the most durable and mechanically robust. These findings highlight Zn-1.5 Mg-0.9Cu as a superior candidate for biomedical implants, particularly in orthopedics.

Graphical abstract

Synthesis and characterization of biomedical implant