Biomedical magnesium alloy and preparation method thereof

A biomedical and magnesium alloy technology, applied in the field of biomedical metal materials, can solve problems such as fast degradation rate, achieve low raw material cost, enhance solid solution strengthening effect, and ensure mechanical properties

Active Publication Date: 2017-03-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the rapid degradation rate of magnesium allo

Method used

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  • Biomedical magnesium alloy and preparation method thereof
  • Biomedical magnesium alloy and preparation method thereof
  • Biomedical magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of as-cast Mg-4.0wt% Zn-0.1wt% Mn-0.2wt% Ca magnesium alloy, Zn / Ca (atomic ratio 12.25) in the alloy.

[0028] 1) Raw material preparation: The test raw materials are 916g of pure magnesium (99.9wt.%), 43.7g of pure zinc (99.99wt.%) (calculated according to 10% burning loss), 27.5g of Mg-9.4wt.%Ca master alloy ( Calculated by 30% burning loss) and 17.4g of Mg-7.4wt.%Mn master alloy (calculated based on 30% burning loss), and the raw materials were polished with grinding wheels to remove surface oxides.

[0029] 2) Melting:

[0030] In order to prevent the oxidation or combustion of the magnesium alloy melt, N 2 +SF 6 The mixed protective gas, where, N 2 and SF 6 The flow ratio is 100:1;

[0031] a) Dry the crucible, slag removal tool, stirring rod and mold in an oven at 200°C for use;

[0032] b) Put the treated crucible into a resistance furnace, set the temperature to 300°C, and when the furnace temperature reaches, pass in protective gas;

[0033] ...

Embodiment 2

[0039] Preparation of as-cast Mg-2.0wt% Zn-0.2wt% Mn-0.5wt% Ca magnesium alloy, Zn / Ca (atomic ratio 2.45) in the alloy.

[0040] 1) Raw material preparation: The test raw materials are 882g of pure magnesium (99.9wt.%), 21.9g of pure zinc (99.99wt.%) (calculated according to 15% burning loss), 68.8g of Mg-9.4wt.% Ca master alloy ( 30% burning loss calculation) and Mg-7.4wt.%Mn master alloy 34.9g (calculation is based on 30% burning loss), and the raw material is polished with a grinding wheel to remove surface oxides.

[0041] 2) Melting:

[0042] In order to prevent the oxidation or combustion of the magnesium alloy melt, N 2 +SF 6 The mixed protective gas, where, N 2 and SF 6 The flow ratio is 100:1;

[0043] a) Dry the crucible, slag removal tool, stirring rod and mold in an oven at 200°C for use;

[0044] b) Put the treated crucible into a resistance furnace, set the temperature to 300°C, and when the furnace temperature reaches, pass in protective gas;

[0045] c) ...

Embodiment 3

[0051] Preparation of as-cast Mg-1.0wt% Zn-0.05wt% Mn-0.2wt% Ca magnesium alloy, Zn / Ca (atomic ratio 3.06) in the alloy.

[0052] 1) Raw material preparation: The test raw materials are 924g of pure magnesium (99.9wt.%), 10.9g of pure zinc (99.99wt.%) (calculated according to 15% burning loss), 27.61g of Mg-9.4wt.%Ca master alloy ( Calculated by 30% burning loss) and 8.77g of Mg-7.4wt.% Mn master alloy (calculated by 30% burning loss), and the raw materials were polished with grinding wheels to remove surface oxides.

[0053] 2) Melting:

[0054] In order to prevent the oxidation or combustion of the magnesium alloy melt, N 2 +SF 6 The mixed protective gas, where, N 2 and SF 6 The flow ratio is 100:1;

[0055] a) Dry the crucible, slag removal tool, stirring rod and mold in an oven at 200°C for use;

[0056] b) Put the treated crucible into a resistance furnace, set the temperature to 300°C, and when the furnace temperature reaches, pass in protective gas;

[0057] c) A...

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Abstract

The invention provides a biomedical magnesium alloy and a preparation method thereof and belongs to the field of biomedical metal materials. The alloy is composed of, by mass percentage, 0.05%-0.2% of Mn, 1%-4% of Zn, 0.05%-1% of Ca and the balance Mg, wherein the molar ratio of Zn to Ca is larger than 1.5. The novel human body biodegradable medical alloy is prepared through certain key technical parameters, such as a melting process and the alloy component ratio. The alloy does not contain rare earth elements and mainly contains the Mg-Zn-Ca phase, the alloy is mainly distributed in the crystal boundary, and less of the alloy is distributed inside a matrix. The alloy has excellent biocompatibility, prominent mechanical properties and excellent plastic processing properties and is controllable in degradation rate. According to the application characteristic of the alloy, the alloy can be used for preparing biodegradable cardiovascular stent materials, orthopaedic implants, bone plates, bone nails and the like.

Description

technical field [0001] The invention belongs to the field of biomedical metal materials, and in particular relates to a Mg-Zn-Mn-Ca series biomedical magnesium alloy and a preparation method thereof. Background technique [0002] As a new type of biodegradable medical metal material, magnesium alloy has attracted extensive attention in the field of medical materials in recent years. Compared with traditional medical metal materials such as stainless steel, titanium alloy, and cobalt-chromium alloy, magnesium alloy has the following advantages as a medical metal material: 1. It has good biocompatibility, is non-toxic and can be degraded in the human body, and its degradation products will not Harmful to the human body. 2. The elastic modulus of magnesium alloy is about 45GPa, which is close to that of human bone. As an orthopedic implant, it can effectively reduce the "stress shielding effect". 3. It has high specific strength and specific stiffness, and good processing per...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C1/03
CPCC22C1/03C22C23/04
Inventor 杜文博马可刘轲王朝辉李淑波贾林玥潘天池
Owner BEIJING UNIV OF TECH
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