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Biodegradable magnesium alloy and preparation method thereof

A magnesium alloy and biological technology, applied in the field of alloys, can solve the problems of less research on the degradation rate of rare earth magnesium alloys, and achieve good application prospects and good mechanical properties.

Inactive Publication Date: 2020-05-22
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on the degradation rate of rare earth magnesium alloys in human tissues

Method used

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  • Biodegradable magnesium alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Its production process method is as follows:

[0032] Ingredients - melting and casting - annealing - T6 heat treatment - finished product.

[0033] The specific process is as follows: the composition design of the new degradable magnesium alloy Mg-Zn-Y-Nd-Ca is shown in Table 1. The melting adopts an intermediate frequency furnace. After the surface is coated with ZnO paint, the temperature is raised to 500°C, the magnesium ingot is put into the crucible, and a small amount of covering agent is added. After the magnesium ingot is completely melted, the temperature is raised to 750°C, and the master alloy Mg-20 with a good ratio is added. %Y, Mg-20%Nd, Mg-12%Zn, and add a small amount of covering agent, keep warm for 30 minutes after the intermediate alloy is completely melted, then raise the temperature to 790°C, add Mg-30%Ca alloy, keep warm after completely melting 30 minutes, then lower the temperature to 760°C, add an appropriate amount of refining agent for refin...

Embodiment 2

[0035] Its production process method is as follows:

[0036] Ingredients - melting and casting - annealing - T6 heat treatment - finished product.

[0037]The specific process is as follows: the composition design of the new degradable magnesium alloy Mg-Zn-Y-Nd-Ca is shown in Table 1. The melting adopts an intermediate frequency furnace. After the surface is coated with ZnO paint, the temperature is raised to 500°C, the magnesium ingot is put into the crucible, and a small amount of covering agent is added. After the magnesium ingot is completely melted, the temperature is raised to 750°C, and the master alloy Mg-20 with a good ratio is added. %Y, Mg-20%Nd, Mg-12%Zn, and add a small amount of covering agent, keep warm for 30 minutes after the intermediate alloy is completely melted, then raise the temperature to 790°C, add Mg-30%Ca alloy, keep warm after completely melting 30 minutes, then lower the temperature to 760°C, add an appropriate amount of refining agent for refini...

Embodiment 3

[0039] Its production process method is as follows:

[0040] Ingredients - melting and casting - annealing - T6 heat treatment - finished product.

[0041] The specific process is as follows: the composition design of the new degradable magnesium alloy Mg-Zn-Y-Nd-Ca is shown in Table 1. The melting adopts an intermediate frequency furnace. After the surface is coated with ZnO paint, the temperature is raised to 500°C, the magnesium ingot is put into the crucible, and a small amount of covering agent is added. After the magnesium ingot is completely melted, the temperature is raised to 750°C, and the master alloy Mg-20 with a good ratio is added. %Y, Mg-20%Nd, Mg-12%Zn, and add a small amount of covering agent, keep warm for 30 minutes after the intermediate alloy is completely melted, then raise the temperature to 790°C, add Mg-30%Ca alloy, keep warm after completely melting 30 minutes, then lower the temperature to 760°C, add an appropriate amount of refining agent for refin...

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PUM

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Abstract

A biodegradable magnesium alloy is characterized in that the magnesium alloy is Mg-Zn-Y-Nd-Ca based magnesium alloy and comprises the following components in percentage by weight: 0.5% of Zn, 3.2-4.5%of Y, 2.0-3.0% of Nd, less than or equal to 0.6% of Ca, and the balance Mg, wherein the impurity content is less than or equal to 0.05%. The invention also discloses a preparation method of the magnesium alloy. By adding the rare earth elements Y and Nd, the degradation speed of the magnesium alloy can be controlled, and due to assistance of other elements, the magnesium alloy shows good mechanical properties, corrosion resistance and biocompatibility, can replace a traditional cardiovascular stent, and has good application prospects.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a biomedical degradable and absorbable magnesium alloy. The invention also relates to a preparation method of the magnesium alloy, which belongs to the field of alloy technology. Background technique [0002] In today's society, the incidence of vascular diseases is increasing year by year, which has seriously endangered human health. Stent implantation is currently a common treatment for vascular obstructive diseases. The metal materials traditionally used for vascular stents include 316L stainless steel, cobalt-chromium alloy, and titanium alloy. These metal stents will not be decomposed by the human body after being implanted in the blood vessel, and will stimulate the blood vessel wall for a long time, resulting in chronic inflammation. Therefore, the development of vascular stents made of degradable materials to replace traditional non-degradable metal stents has become a development tr...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03C22F1/06C25D11/30A61L31/14A61L31/02
CPCA61L31/022A61L31/14A61L31/146A61L31/148C22C1/03C22C23/06C22F1/06C25D11/024C25D11/026C25D11/30
Inventor 戴悦来吕娟马兰朱宇瑾左欣
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH