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Low-elasticity-modulus degradable biomedical magnesium alloy and preparation and processing method thereof

A low-elastic-modulus, biomedical technology, applied in the field of low-elastic-modulus degradable biomedical magnesium alloys and their preparation and processing, as well as new functional application-like magnesium alloy materials, can solve problems such as human harm and cell death, and achieve low The effect of elastic modulus

Active Publication Date: 2020-04-07
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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-elasticity-modulus degradable biomedical magnesium alloy and preparation and processing method thereof

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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). Selecting high-purity magnesium as the basic material for alloy preparation, the specific requirements are that the content of pure magnesium reaches 5 9s, the selection of Mg-30Ca, Mg-30Sr, and Mg-10Ti master alloys, the selection of simple Si, Zn, and other impurities are controlled below 200ppm. First, the pure magnesium is kept warm in a preheating furnace, the temperature range is controlled at 200°C, and the heat preservation time is 10 minutes to ensure that the surface is free of moisture, and at the same time, it is protected by dried argon. At the same time, heat up the crucible, the temperature should reach 400℃, the holding time should be controlled at 30 minutes, and argon gas should be introduced for protection. Put the preheated pure magnesium into the crucible, then heat up to 600°C for 10 minutes, then continue to heat up, set the temperature to 700°C, and pass in dry...

Embodiment 2

[0047] The basic composition of the alloy is Mg-2Zn-1.3Ca-1.2Sr-0.6Ti-0.5Si (mass percentage). Selecting high-purity magnesium as the basic material for alloy preparation, the specific requirements are that the content of pure magnesium reaches 5 9s, the selection of Mg-30Ca, Mg-30Sr, and Mg-10Ti master alloys, the selection of simple Si, Zn, and other impurities are controlled below 200ppm. First, the pure magnesium is kept warm 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 moisture on the surface, and at the same time pass through dried argon for protection. At the same time, heat up the crucible, the temperature should reach 425℃, the holding time should be controlled at 30 minutes, and argon gas should be introduced for protection. Put the preheated pure magnesium into the crucible, then heat up to 600°C for 15 minutes, then continue to heat up, set the temperature to 705°C, and...

Embodiment 3

[0052] The basic composition of the alloy is Mg-2Zn-1.6Ca-1.5Sr-1Ti-0.1Si (mass percentage). Selecting high-purity magnesium as the basic material for alloy preparation, the specific requirements are that the content of pure magnesium reaches 5 9s, the selection of Mg-30Ca, Mg-30Sr, and Mg-10Ti master alloys, the selection of simple Si, Zn, and other impurities are controlled below 200ppm. First, the pure magnesium is kept warm 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 moisture on the surface, and at the same time pass through dried argon for protection. At the same time, heat up the crucible, the temperature should reach 450℃, the holding time should be controlled at 30 minutes, and argon gas should be introduced for protection. Put the preheated pure magnesium into the crucible, then heat up to 600°C for 10 minutes, then continue to heat up, set the temperature to 710°C, and p...

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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 new degradable biomedical magnesium alloy, in particular to a low elastic modulus degradable biomedical magnesium alloy and a preparation and processing method thereof, and belongs to a new type of functional application magnesium alloy material that can be applied commercially. 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 rigidity, good shock absorption performance and good electromagnetic shielding performance. , Is regarded as an important high-quality structural and functional integration material in the future. Although magnesium alloy has many advantages, magnesium alloy has shortcomings such as not corrosion resistance, poor heat resistance and low elastic modulus, so it has been criticized by everyone in the application process. Howeve...

Claims

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Application Information

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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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