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Low elastic modulus degradable biomedical metal and its preparation and processing method

A low-elastic-modulus, biomedical technology, applied in functional application-like magnesium alloy materials, low-elastic-modulus degradable biomedical metals and their preparation and processing fields, can solve problems such as human harm and cell death, and achieve low elastic modulus. amount of effect

Active Publication Date: 2020-11-06
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although magnesium is beneficial to the human body, its degradation process is very rapid, and a large amount of hydrogen gas is generated under the skin. At the same time, it will alkalize the surrounding tissues, cause cell death, and be harmful to the human body. The harm of the product to the tissue and reducing the overflow rate of hydrogen gas are the research hotspots of biomedical magnesium alloys at this stage

Method used

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  • Low elastic modulus degradable biomedical metal and its preparation and processing method

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Experimental program
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Effect test

Embodiment 1

[0042] The basic composition of the alloy is Mg-1Zn-0.8Ca-0.2Sr-0.3Ti-0.1Si (mass percentage). Select high-purity magnesium as the basic material for alloy preparation. The specific requirements are that the content of pure magnesium should reach 5 nines, select Mg-30Ca, Mg-30Sr, and Mg-10Ti master alloys, select simple Si and Zn, and control other impurities below 200ppm. Firstly, heat preservation of pure magnesium in a preheating furnace, the temperature range is controlled at 200°C, and the heat preservation time is 10 minutes to ensure that there is no water vapor on the surface, and at the same time, it is protected by dried argon. At the same time, the temperature of the crucible should be raised to 400°C, the holding time should be controlled at 30 minutes, and argon gas should be introduced at the same time for protection. Put the preheated pure magnesium into the crucible, then raise the temperature to 600°C, keep it warm for 10 minutes, then continue to raise the te...

Embodiment 2

[0047] The basic composition of the alloy is Mg-2Zn-1.3Ca-1.2Sr-0.6Ti-0.5Si (mass percentage). Select high-purity magnesium as the basic material for alloy preparation. The specific requirements are that the content of pure magnesium should reach 5 nines, select Mg-30Ca, Mg-30Sr, and Mg-10Ti master alloys, select simple Si and Zn, and control other impurities below 200ppm. Firstly, heat preservation of pure magnesium in a preheating furnace, the temperature range is controlled at 225°C, and the heat preservation time is 15 minutes to ensure that there is no water vapor on the surface, and at the same time, it is protected by dried argon. At the same time, the temperature of the crucible should be raised to 425°C, the holding time should be controlled at 30 minutes, and argon gas should be introduced at the same time for protection. Put the preheated pure magnesium into the crucible, then raise the temperature to 600°C, keep it warm for 15 minutes, then continue to raise the te...

Embodiment 3

[0052] The basic composition of the alloy is Mg-2Zn-1.6Ca-1.5Sr-1Ti-0.1Si (mass percentage). Select high-purity magnesium as the basic material for alloy preparation. The specific requirements are that the content of pure magnesium should reach 5 nines, select Mg-30Ca, Mg-30Sr, and Mg-10Ti master alloys, select simple Si and Zn, and control other impurities below 200ppm. Firstly, heat preservation of pure magnesium in a preheating furnace, the temperature range is controlled at 250°C, and the heat preservation time is 20 minutes to ensure that there is no water vapor on the surface, and at the same time, it is protected by dried argon. At the same time, the temperature of the crucible should be raised to 450°C, the holding time should be controlled at 30 minutes, and argon gas should be introduced at the same time for protection. Put the preheated pure magnesium into the crucible, then raise the temperature to 600°C, keep it warm for 10 minutes, then continue to raise the temp...

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Abstract

The invention relates to a low-elasticity-modulus degradable biomedical magnesium alloy and a preparation and processing method thereof, and belongs to a novel functional application type magnesium alloy material capable of being commercially applied. The alloy comprises the following components in percentage by mass: 1-5% of Zn, 0.8-2.2% of Ca, 0.2-1.5% of Sr, 0.3-1.0% of Ti, 0.1-0.5% of Si and the balance of Mg, wherein the sequence of the contents of the alloy elements is Zn>Ca>Sr>Ti>Si, (Ca+Sr) is larger than 3-fold Ti, and Ti+Si<1.2%. The invention further provides a preparation and processing method of the low-elasticity-modulus degradable biomedical magnesium alloy. The typical strengthening phase, type and proportion formed by the main alloy elements and the base body cannot obviously improve the elasticity modulus of the alloy, the elasticity modulus can be reduced through heat treatment, and the purposes of low elasticity modulus, no toxicity and degradability are achieved.

Description

technical field [0001] The invention relates to a degradable biomedical metal, in particular to a low elastic modulus degradable biomedical metal and a preparation and processing method thereof, belonging to commercially applicable functional magnesium alloy materials. Background technique [0002] As the lightest metal structural material, magnesium alloys are increasingly used in aerospace and weaponry. In addition, magnesium alloys also have the advantages of high specific strength, high specific stiffness, good shock absorption performance, and good electromagnetic shielding performance. , is regarded as an important high-quality structure-functional integration material in the future. Although magnesium alloy has many advantages, magnesium alloy has disadvantages such as no corrosion resistance, poor heat resistance and low elastic modulus, so it has been criticized by everyone in the application process. However, with the continuous deepening of research on the proper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/06C22F1/02
CPCC22C1/03C22C23/04C22F1/02C22F1/06
Inventor 马鸣龙张奎李永军袁家伟李兴刚石国梁薛鹏皓
Owner GRIMAT ENG INST CO LTD
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