![]() mentioned that the addition of 6% Zn to the magnesium matrix not only improved its mechanical properties but also reduced the corrosion rate and showed good cytocompatibility. found that the corrosion resistance of Mg–Zn alloys improved with increasing Zn content in the range of 1–5%. The result also showed that Zn exhibited an antiproliferative effect and strong antiatherogenic properties, which reduced neointimal hyperplasia, regulated inflammatory cytokines, and guarded against restenosis after stent implantation. The corrosion potential of zinc is (−0.763 V) much higher compared with single magnesium. The human body requires about 15 mg/day of zinc, proving that zinc demonstrates good biocompatibility for the human body. Zinc is a daily essential element for the human body and plays a key role in human health. However, the high chloride-ion concentration in the human body and the rapid corrosion rate of a single magnesium implant after implantation in the human body lead to a rapid loss of mechanical integrity of magnesium thus causing implant failure. In addition to its good biocompatibility magnesium has a low modulus of elasticity of 45 GPa, which matches very well with the modulus of elasticity of human bone and thus does not lead to stress shielding caused by the implant in the body. The ideal biodegradable metallic material should provide complete mechanical strength during human-tissue repair, and moreover should have good biocompatibility so that it gradually degrades in the body and is absorbed by the body within 1–2 years. cm −2 respectively, which are more suitable for use as human implant bone splints in human-body fluid environment.Ĭurrently, magnesium-alloy material is a new generation of implant material that can be used as biodegradable material for human body due to its good biocompatibility and high strength.Its maximum compressive stress, maximum bending strength, and corrosion-current density reached 318.96 MPa, 189.41 MPa and 2.08 × 10 −5 A From the comparison of the above properties, it was concluded that the three prepared alloys of which Mg–20% Zn had the best overall performance. On the polarization curve, the maximum positive shift of corrosion potential of the specimens was 73 mv and the maximum decrease of corrosion-current density was 53.2%. The results show that compared with the traditional magnesium alloy using powder metallurgy, prepared magnesium alloy has good resistance to compression and bending, its maximum compressive stress can reach up to 318.96 MPa, the maximum bending strength reached 189.41 MPa, and can meet the mechanical properties of the alloy as a human bone-plate requirements. ![]() The effect of zinc on the microstructure, mechanical properties, wear performance, and corrosion resistance of magnesium–zinc alloys was studied when the zinc content was different. In this study, three alloys (mass fractions: Mg–10Zn, Mg–20Zn, and Mg–30Zn (wt.%)) were prepared using powder metallurgy by homogeneously mixing powders of the above materials in a certain amount with magnesium as the substrate through the addition of zinc elements, which also have good biocompatibility. However, the mechanical properties and corrosion resistance of magnesium alloys need to be further improved to meet the requirements for human biodegradable implants. In the field of medical materials, magnesium not only has the advantage of light weight, high strength, and a density similar to that of human bone, but also has good biocompatibility and promotes the growth of human bone. In recent years, along with the development and application of magnesium alloys, magnesium alloys have been widely used in automotive, aerospace, medicine, sports, and other fields. ![]()
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