Achieving high strength and antibacterial Zn-4Ag-Mn alloy with homogenous corrosion behavior via high-pressure solid solution
(1. School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China;
2. Key laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, Xiangtan 411105, China)
2. Key laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, Xiangtan 411105, China)
Abstract: Zn-4Ag-Mn alloy was successfully prepared by high-pressure solid solution (HPS) method to achieve high strength and antibacterial implant materials which can degrade uniformly. Microstructural characterization showed that HPS treatment on Zn-4Ag-Mn alloy resulted in 57.9% grain refinement, and the average size of the second phases was reduced to 10.2 μm compared with as-cast (AC) alloy. The compression, Vickers hardness and wear and friction tests showed particularly high mechanical properties of HPS alloys, including a compressive yield strength of 333.5 MPa and a Vickers hardness of Hv 89.5. Electrochemical corrosion, and immersion corrosion tests showed that HPS treatment optimized the corrosion resistance of the alloy with homogenous corrosion. Furthermore. The HPS-treated Zn-4Ag-Mn alloy exhibited excellent antibacterial properties through antibacterial testing, with an antibacterial rate of 71.6%. These results suggest that the HPS-treated Zn-4Ag-Mn alloy can be considered as a promising biodegradable implant material.
Key words: Zn-Ag-Mn alloy; high-pressure solid solution; high strength; homogenous corrosion; antibacterial property