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Fully absorbed mg-zn-ag system amorphous alloy and preparation method thereof

An amorphous alloy, fully absorbed technology, applied in prosthesis, surgery, medical science, etc., can solve the problems of fast degradation rate of magnesium and magnesium alloys, failure to form protective oxide film, loss of function of implanted components, etc., to achieve Excellent biocompatibility, excellent mechanical strength and hardness, slow degradation effect

Active Publication Date: 2021-08-13
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) The standard electrode potential of magnesium is very low, it is easy to corrode, and cannot form an effective protective oxide film, especially the Cl in body fluids - It will accelerate the corrosion of magnesium alloys, causing the degradation rate of magnesium and magnesium alloys in the human body to be too fast, which will easily lead to premature loss of function of its implanted components before the injured tissue heals;

Method used

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  • Fully absorbed mg-zn-ag system amorphous alloy and preparation method thereof
  • Fully absorbed mg-zn-ag system amorphous alloy and preparation method thereof
  • Fully absorbed mg-zn-ag system amorphous alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: Sample A1: Mg76Zn20Ag4

[0040] (1) According to the designed alloy composition ratio, weigh 76at.% Mg, 20at.% Zn and 4at.% Ag on an electronic balance with an accuracy of 0.0001g;

[0041] (2) Put the weighed Mg, Zn, Ag raw materials into the test tube of the amorphous smelting furnace, and carry out mixed smelting in the presence of high-purity inert protective gas helium, and the pressure of the high-purity inert protective gas is 1 standard atmosphere , the input voltage of the amorphous melting furnace is three-phase 380V 50-60Hz, the maximum power is 40kW, and the working current is 300-1800A;

[0042] (3) Remelt the obtained alloy at least 3 times, then feed high-pressure inert protective gas helium into the test tube of the amorphous smelting furnace to carry out metal spraying, and the pressure of the high-pressure inert protective gas is about 10Mpa;

[0043] (4) Demoulding after spray casting to obtain the fully absorbed Mg-Zn-Ag based amorphou...

Embodiment 2

[0044] Embodiment 2: Sample A2: Mg73Zn23Ag4

[0045] (1) According to the designed alloy composition ratio, weigh 73at.% Mg, 23at.% Zn and 4at.% Ag on an electronic balance with an accuracy of 0.0001g;

[0046] (2) Put the weighed Mg, Zn, Ag raw materials into the test tube of the amorphous smelting furnace, and carry out mixed melting under the presence of high-purity inert protective gas argon, and the pressure of the high-purity inert protective gas is 1 standard atmosphere , the input voltage of the amorphous melting furnace is three-phase 380V 50-60Hz, the maximum power is 40kW, and the working current is 300-1800A;

[0047] (3) Remelt the obtained alloy at least 3 times, then feed high-pressure inert protective gas argon into the test tube of the amorphous smelting furnace to carry out metal spraying, and the pressure of the high-pressure inert protective gas is about 10Mpa;

[0048] (4) Demoulding after spray casting to obtain the fully absorbed Mg-Zn-Ag system amorpho...

Embodiment 3

[0049] Embodiment 3: Sample A3: Mg70Zn26Ag4

[0050] (1) According to the designed alloy composition ratio, weigh 70at.%Mg, 26at.%Zn and 4at.%Ag on an electronic balance with an accuracy of 0.0001g;

[0051](2) Put the weighed Mg, Zn, Ag raw materials into the test tube of the amorphous smelting furnace, and carry out mixed smelting in the presence of high-purity inert protective gas helium, and the pressure of the high-purity inert protective gas is 1 standard atmosphere , the input voltage of the amorphous melting furnace is three-phase 380V 50-60Hz, the maximum power is 40kW, and the working current is 300-1800A;

[0052] (3) Remelt the obtained alloy at least 3 times, then feed high-pressure inert protective gas helium into the test tube of the amorphous smelting furnace to carry out metal spraying, and the pressure of the high-pressure inert protective gas is about 10Mpa;

[0053] (4) Demoulding after spray casting to obtain the fully absorbed Mg-Zn-Ag system amorphous a...

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Abstract

The invention relates to a fully-absorbed Mg-Zn-Ag-based amorphous alloy with strong corrosion resistance, high strength and good biocompatibility and a preparation method thereof. The alloy is composed of the following components in the following atomic percentages : Silver 0%‑10%, and the silver content is not 0; zinc 15%‑40%; impurity 0%‑5%; the balance is magnesium. The fully absorbed Mg-Zn-Ag series amorphous alloy of the present invention has excellent mechanical strength and hardness, low gas release, strong corrosion resistance, and can be gradually absorbed by the human body as the damaged tissue heals after being implanted into the human body. It can be absorbed and degraded without secondary surgery, and it is an excellent choice as a degradable implant material in the human body, and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of magnesium-based amorphous alloy materials, and in particular relates to a fully absorbed Mg-Zn-Ag series amorphous alloy and a preparation method thereof. Background technique [0002] In modern biomedicine, some metals or alloys are often used as human implant materials, such as cardiovascular implant stents. The density and elastic modulus of magnesium and magnesium alloys are closer to those of human bones than other medical metal materials, and their mechanical properties are similar to those of human bones. As implant materials, they can effectively avoid or alleviate the effect of force shielding and shorten bones. tissue healing process. In addition, after being implanted into the human body, magnesium and magnesium alloys can be gradually absorbed and degraded by the human body as the damaged tissue heals without the need for secondary surgery to remove it, and due to its good biocompatibility, it can avoi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00B22F3/115A61L27/04A61L27/58A61L31/02A61L31/14
CPCC22C45/005B22F3/115A61L27/047A61L27/58A61L31/022A61L31/148C22C1/11
Inventor 王见张章肖忆楠赵玲玉都贝宁盛立远
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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