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Preparation method of particle-reinforced medical magnesium-based composite material

A particle-reinforced, composite material technology is applied in the field of preparation of particle-reinforced medical magnesium-based composite materials. , The effect of low processing cost and simple operation process

Inactive Publication Date: 2020-08-28
珠海中科先进技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation technology of metal matrix composites can be divided into external composite method and in-situ generation method. Among them, the external composite method is not only complicated in process and high in cost, but also has poor compatibility between the reinforcing phase and the matrix, and poor bonding effect. question

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  • Preparation method of particle-reinforced medical magnesium-based composite material
  • Preparation method of particle-reinforced medical magnesium-based composite material
  • Preparation method of particle-reinforced medical magnesium-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This example provides a method for preparing a particle-reinforced medical magnesium-based composite material, including the following steps:

[0038] S1: Put the preheated AZ31 magnesium alloy into a container, heat and melt it under a protective atmosphere, and obtain a magnesium alloy melt in a molten state;

[0039] S2: After adding high-purity Si fine powder to the magnesium alloy melt obtained in step S1, the melt is heated up, and left standing for the first time under a protective atmosphere;

[0040] S3: After the magnesium alloy melt obtained in step S2 is subjected to vacuum electromagnetic stirring, the surface scum is removed, and the second standing is carried out under a protective atmosphere;

[0041] S4: After removing surface dross from the magnesium alloy melt obtained in step S3, cooling the melt, and pouring it into a mold to obtain an ingot;

[0042] S5: Put the ingot obtained in step S4 into a box-type resistance furnace, and perform solution agi...

Embodiment 2

[0051] In this example, a particle-reinforced medical magnesium-based composite material is actually prepared, and the specific steps include:

[0052] (1) Cut and weigh the cleaned AZ31 magnesium alloy according to the proportion, and then put it into a vacuum drying oven for preheating treatment, wherein the preheating temperature is 200°C, and the preheating time is 2h;

[0053] (2) Put the preheated AZ31 magnesium alloy into a high-frequency resistance melting furnace, and then under the protection of tetrafluoroethane gas, melt the AZ31 magnesium alloy when it is heated to 650°C;

[0054] (3) adding 0.5wt.% high-purity Si fine powder to the melted magnesium alloy melt, then raising the temperature of the melt to 740° C., and standing still for 30 minutes under the protection of tetrafluoroethane gas;

[0055] (4) Stir the melt after standing for 20 minutes by vacuum electromagnetic mode, then remove the scum on the surface of the melt, and stand for 20 minutes under the p...

Embodiment 3

[0061] In this example, a particle-reinforced medical magnesium-based composite material is actually prepared, and the specific steps include:

[0062] (1) Cut and weigh the cleaned AZ31 magnesium alloy according to the proportion, and then put it into a vacuum drying oven for preheating treatment, wherein the preheating temperature is 200°C, and the preheating time is 2h;

[0063] (2) Put the preheated AZ31 magnesium alloy into a high-frequency resistance melting furnace, and then under the protection of tetrafluoroethane gas, melt the AZ31 magnesium alloy when it is heated to 660°C;

[0064] (3) adding 1.5wt.% high-purity Si fine powder into the melted magnesium alloy melt, and then raising the temperature of the melt to 750° C., and standing still for 40 minutes under the protection of tetrafluoroethane gas;

[0065] (4) Stir the melt after standing still for 30min by vacuum electromagnetic mode, then remove the scum on the surface of the melt, and stand still for 25min und...

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Abstract

The invention provides a preparation method of a particle-reinforced medical magnesium-based composite material. According to the preparation method, an AZ31 magnesium alloy is used as a raw material,the process is simple, and the matrix structure of the prepared composite material is small in size, round in shape and uniform in distribution. The microstructure of the material presents an obviousnon-dendritic crystal form, and the material has good rheological properties. In the preparation process of the preparation method, high-purity Si fine powder is added, and the high-purity Si fine powder can obviously enhance the flowability of magnesium alloy melt, and dispersively-distributed stable precipitated phase Mg2Si particles can be generated in situ in the matrix structure, and the mg2Si particles generated in situ have the advantages of being small in size, clean in interface, good in thermal stability, good in compatibility with a matrix, low in preparation cost and the like. Grain boundary slippage in the matrix structure be effectively prevented, the mechanical property of the magnesium-based composite material be obviously improved, and the magnesium-based composite material can have remarkable damping vibration attenuation performance.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a method for preparing a particle-reinforced medical magnesium-based composite material. Background technique [0002] At present, the common external fixation devices for medical fractures in clinical practice are mainly made of stainless steel, titanium alloy and polymer materials. Such materials will cause local allergic reactions, vacuum electromagnetic traction damage, insufficient support strength and Stress shielding effects and other issues. In view of the above reasons, researchers have developed a medical magnesium alloy, which has the following significant advantages: (1) Good biocompatibility. Magnesium alloys have good compatibility with the human body and will not cause allergic reactions to fixed parts. (2) Higher specific strength and specific stiffness. Magnesium alloy has similar specific strength and specific stiffness to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/02C22F1/06
CPCC22C1/02C22C23/02C22F1/06
Inventor 马国睿吴锋占小红王磊磊吴庆春
Owner 珠海中科先进技术研究院有限公司
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