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Multi-element small-amount degradable antibacterial magnesium alloy and preparation method thereof

An antibacterial magnesium and magnesium alloy technology, applied in the field of light metal materials, can solve problems such as restricting the application of magnesium alloys, uncontrollable degradation rate, weakening mechanical properties, etc., and achieve the effects of easy control, improved antibacterial performance, and reduced degradation rate

Active Publication Date: 2020-06-16
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As an implantable and degradable medical material, magnesium alloys still have shortcomings, such as uncontrollable degradation rate, which restricts the application of magnesium alloys
On the one hand, it weakens the mechanical properties. On the other hand, it is easy to become the place where pitting corrosion occurs preferentially during corrosion experiments, which easily leads to uneven corrosion.

Method used

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  • Multi-element small-amount degradable antibacterial magnesium alloy and preparation method thereof
  • Multi-element small-amount degradable antibacterial magnesium alloy and preparation method thereof
  • Multi-element small-amount degradable antibacterial magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Step 1. Weigh each component and preheat, and weigh according to weight fraction: Ca: 0.4%, Zn: 0.8%, Ag: 0.3%, Se: 0.02%, Mn: 0.05%, and the balance is Mg and unavoidable Impurities ≤ 0.2%; put the weighed raw materials into an oven with high-purity argon, and heat at 60°C for 30min;

[0065] Among them, Se through Ag 2 Se way to add;

[0066] In the present invention, considering burning loss, as a kind of preference, the actual addition amount of Zn is 1.05 times of the above-mentioned content;

[0067] Step 2, alloy melting and casting, put the high-purity magnesium ingot into the high-purity graphite crucible of the high-vacuum-atmosphere protection melting furnace, and vacuumize to 2×10 -4 Pa, and then filled with 0.06MPa high-purity argon as a protective atmosphere, heated to complete melting under the protection of argon, after adding Mg-Mn master alloy, Mg-Ca master alloy and high-purity silver ingot at 670 ° C, the first Raise the temperature to 705°C until...

Embodiment 2

[0072] Step 1. Weigh each component and preheat, and weigh according to weight fraction: Ca: 0.9%, Zn: 1.0%, Ag: 1.35%, Se: 0.08%, Mn: 0.1%, and the balance is Mg and unavoidable Impurities ≤ 0.2%; put the weighed raw materials into an oven with high-purity argon, and heat at 100°C for 20 minutes;

[0073] Among them, Se through Ag 2 Se way to add;

[0074] In the present invention, considering burning loss, as a kind of preference, the actual addition amount of Zn is 1.05 times of the above-mentioned content;

[0075] Step 2, alloy melting and casting, put the high-purity magnesium ingot into the high-purity graphite crucible of the high-vacuum-atmosphere protection melting furnace, and evacuate to 5×10 -4 Pa, and then filled with 0.05MPa high-purity argon as a protective atmosphere, heated to complete melting under the protection of argon, after adding Mg-Mn master alloy, Mg-Ca master alloy and high-purity silver ingot at 675 ° C, the first Raise the temperature to 700°C ...

Embodiment 3

[0080] Step 1. Weigh each component and preheat, and weigh according to weight fraction: Ca: 1.2%, Zn: 1.2%, Ag: 2.0%, Se: 0.2%, Mn: 0.15%, and the balance is Mg and unavoidable Impurities ≤ 0.2%; put the weighed raw materials into an oven with high-purity argon, and heat at 100°C for 20 minutes;

[0081] Among them, Se through Ag 2 Se way to add;

[0082] In the present invention, considering burning loss, as a kind of preference, the actual addition amount of Zn is 1.05 times of the above-mentioned content;

[0083] Step 2, alloy melting and casting, put the high-purity magnesium ingot into the high-purity graphite crucible of the high-vacuum-atmosphere protection melting furnace, and evacuate to 3×10 -4 Pa, and then filled with 0.08MPa high-purity argon as a protective atmosphere, heated to complete melting under the protection of argon, after adding Mg-Mn master alloy, Mg-Ca master alloy and high-purity silver ingot at 690 ° C, the first Raise the temperature to 720°C u...

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Abstract

The invention discloses a multi-element small-amount degradable antibacterial magnesium alloy. The multi-element small-amount degradable antibacterial magnesium alloy is prepared from the following components of, in percentage by weight, 0.4 %-1.2 % of Ca, 0.8 %-1.2 % of Zn, 0.3 %-2.0 % of Ag, 0.02 %-0.2 % of Se, 0.05 %-0.15 % of Mn, and the balance Mg and inevitable impurities, wherein the Se element is added in a manner of Ag2Se. The invention further discloses a preparation method of the novel antibacterial multi-element wrought magnesium alloy. According to the alloy and the method, a castingot is prepared through the multi-element alloying component design, through the high-purity raw material and through the vacuum-atmosphere protection smelting method, so that the purity of the alloy is guaranteed; then turning, the homogenizing treatment, the extrusion and the heat treatment are carried out, so that solid solution strengthening, fine grain strengthening and second phase strengthening are realized, and the mechanical property of the alloy is improved; and the corrosion resistance and the antibacterial property of the alloy are improved through the formation of a CaZnAg phase and the addition of Se.

Description

technical field [0001] The invention relates to a multi-component and small amount degradable antibacterial magnesium alloy and a preparation method thereof, belonging to the field of light metal materials. Background technique [0002] Magnesium alloys have the advantages of low density, high specific strength and good machinability. At the same time, the elastic modulus and compressive yield strength of magnesium alloys are closer to natural bone than other commonly used metal implants, and they have good biofunctionality and degradability. At the same time, magnesium is an important trace element in the human body, and its cation content is the fourth most abundant cation. Nearly 50% of the magnesium in the human body is stored in bone tissue, which is very important for bone development and metabolism. Therefore, magnesium alloy is expected to become a new generation of bio-implantable degradable materials and has attracted much attention. [0003] The density, compres...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22C23/04C22F1/06
Inventor 刘国军王慧远史红艳查敏王珵杨治政
Owner JILIN UNIV
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