Corrosion-resistant and high-strength and toughness Zn-Fe-Li-based zinc alloy capable of being degraded in human body and application of corrosion-resistant and high-strength and toughness Zn-Fe-Li-based zinc alloy

Abstract

The invention discloses a corrosion-resistant and high-strength and toughness Zn-Fe-Li-based zinc alloy capable of being degraded in a human body and an application of the corrosion-resistant and high-strength and toughness Zn-Fe-Li-based zinc alloy, relates to field of medical implantation materials, and provides the corrosion-resistant and high-strength and toughness Zn-Fe-Li-based zinc alloy which is low in cost of added materials, high in strength, good in plasticity and controllable in degradation rate, has non-expanding and non-migrating degradation products and can be simultaneously degraded in the human body against the defects in the prior art. The zinc alloy comprises Zn, Fe and Li elements, wherein the content of the Zn element in mass percentage is 80-99.997%, the content of the Fe element in mass percentage is 0.002-10%, and the content of the Li element in mass percentage is 0.001-10%. The cost of the materials added into the zinc-based alloy disclosed by the invention is low, the degradation products of various components in the prepared alloy material can be degraded in the human body by metabolism, the corrosion resistance is much higher than that of a magnesium alloy, the degradation speed is greatly reduced, the mechanical support can be provided for a longer time, and the alloy material has good strength and toughness.

Description

technical field [0001] The invention relates to a human body degradable corrosion-resistant high-strength Zn-Fe-Li zinc alloy, which belongs to the technical field of medical implant materials. Background technique [0002] Zinc ions are essential nutrients for the human body and participate in many metabolic activities of the human body. The American Institute for Clinical Innovation (ACI) recommends that the human body must consume 2.5 to 6.4 mg of zinc per day. Adults may have certain toxic reactions if they consume about 300 mg of zinc per day. A zinc-based degradable bone nail releases about 0.2-0.3 mg of zinc per day. Even if all these zinc ions are released into the blood vessels, it is far below the necessary intake of the human body. That is to say, the zinc ions released by the degradation of zinc-based degradable orthopedic implant devices will not cause systemic toxicity. The study also found that the transport of zinc ions in human tissues is very rapid, so th...

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Problems solved by technology

The degradation products of pure magnesium and magnesium-based alloys are non-toxic and degradable, but their corrosion resistance is very poor, and they will be degraded soon in the human body, unable to provide sufficient mechanical support time

[0006] Pure zinc and its alloys are also degradable materials in the human environment, but they still have the disadvantages of low mechanical strength and uncontrollable degradation rate when applied to medical materials. At present, it is achieved by adding other substances to it. Regulate the degradation rate, such as the addition of Ce, Mg, Cu, and Ca to the zinc disclosed in the application number 201310756776.1, but the zinc alloy material prepared by this application has low plasticity, and it has not been found that cheap iron is used as an additive material for zinc. biomedical materials to use

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