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A biodegradable high-strength-tough-corrosion-resistant magnesium alloy for orthopedics and preparation method thereof

A magnesium alloy and biological technology, which is applied in the field of high-strength, toughness and corrosion-resistant orthopaedic magnesium alloy and its preparation, and achieves the effects of increasing the degree of supercooling, reducing the activation energy of nucleation, and increasing the rate of nucleation.

Inactive Publication Date: 2019-06-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention is mainly applicable to the medical field of orthopedic implantation

Method used

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  • A biodegradable high-strength-tough-corrosion-resistant magnesium alloy for orthopedics and preparation method thereof

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Effect test

Embodiment 1

[0033] In the present embodiment, the raw material composition is as follows: Sr 0.5%, Zr 0.4%, the rest is Mg and contains a small amount of impurity elements Fe, Ni, Al, Cu, impurity elements are calculated by mass percentage, and each content is no more than 0.1%. The amount does not exceed 0.4%.

[0034]The preparation method of magnesium alloy in the present embodiment is as follows:

[0035] First, use ZnO and talcum powder paint to evenly brush the inner wall of the self-made non-magnetic stainless steel crucible to white, and preheat the slag removal spoon, stirring spoon, and mold to 200°C; then when the furnace temperature rises to 400°C, put 500g magnesium block Put it into the crucible and continue to heat up to 710°C, keep it warm for 15 minutes to melt the magnesium block; when the temperature of the magnesium-based melt rises to 750°C, remove the slag, add 2.5g of pure Sr and 6.6g of Mg-30wt.%Zr master alloy at the same time , use a stirring spoon to stir sligh...

Embodiment 2

[0040] In the present embodiment, the raw material composition is as follows: Sr 4.0%, Zr 0.7%, the rest is Mg and contains a small amount of impurity elements Fe, Ni, Al, Cu, impurity elements are calculated by mass percentage, and each content is no more than 0.1%. The amount does not exceed 0.4%.

[0041] The preparation method of magnesium alloy in the present embodiment is as follows:

[0042] First, use ZnO and talcum powder paint to evenly brush the inner wall of the self-made non-magnetic stainless steel crucible to white, and preheat the slag removal spoon, stirring spoon, and mold to 205°C; then when the furnace temperature rises to 420°C, put 500g magnesium block Put it into the crucible and continue to heat up to 720°C, keep it warm for 20 minutes to melt the magnesium block; when the temperature of the magnesium-based melt rises to 760°C, remove the slag, add 21.3g of pure Sr and 12.3g of Mg-30wt.%Zr master alloy at the same time, Use a stirring spoon to stir sli...

Embodiment 3

[0047] In the present embodiment, raw material composition is as follows: Sr 0.5%, Zr0.5%, all the other are Mg and contain a small amount of impurity element Fe, Ni, Al, Cu, impurity element is calculated by mass percentage, each content is no more than 0.1%, The total amount shall not exceed 0.4%.

[0048] The preparation method of magnesium alloy in the present embodiment is as follows:

[0049] First, paint the inner wall of the self-made non-magnetic stainless steel crucible evenly with ZnO and talcum powder to white, and preheat the slag removal spoon, stirring spoon, and mold to 210°C; then when the furnace temperature rises to 430°C, put 500g magnesium block Put it into the crucible and continue to heat up to 715°C, keep it warm for 18 minutes to melt the magnesium block; when the temperature of the magnesium-based melt rises to 755°C, remove the slag, add 2.6g of pure Sr and 8.35g of Mg-30wt.%Zr master alloy at the same time , use a stirring spoon to stir slightly be...

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Abstract

The invention discloses a degradable high toughness corrosion-resistant orthopedic magnesium alloy in a living body and a preparation method thereof and belongs to the field of biomaterials. The degradable high toughness corrosion-resistant orthopedic magnesium alloy in the living body is a magnesium alloy composed of Mg, Sr and Zr. The degradable high toughness corrosion-resistant orthopedic magnesium alloy in the living body comprises the following chemical components in percentages by mass: 0.5-4.0% of Sr, 0.4-0.7% of Zr and the balance of Mg. The preparation method comprises the following steps of: manufacturing a cast ingot by means of a whole course gas shield resistance furnace smelting plus a rotating magnetic field and an ultrasonic external field compound treatment technology; and then performing homogenization treatment and thermal compressional deformation to obtain a second phase in dispersive distribution of uniform and fine Mg17Sr2 on a magnesium matrix so as to obtain the fully degradable biomedical magnesium alloy which can promote bone tissue union and generation of new bones, enhances the bone binding ability, and is high in toughness and corrosion resistant. The m degradable high toughness corrosion-resistant orthopedic magnesium alloy in the living body disclosed by the invention is primarily suitable for the medical field of orthopedic implanting.

Description

technical field [0001] The invention relates to a biodegradable high-strength, toughness, corrosion-resistant orthopedic magnesium alloy and a preparation method thereof, belonging to the field of magnesium alloy biomaterials. Background technique [0002] In vivo biodegradable absorbent materials are a hotspot in the research of biomaterials. Biodegradable absorbing materials for clinical application are mainly polymers and certain ceramic materials, such as polylactic acid, calcium phosphate, etc., but the strength of polymer materials is low, and the plasticity and toughness of ceramic materials are poor. The advantages of metal materials such as stainless steel, titanium alloy, and cobalt-chromium alloy for orthopedic implants lie in their good mechanical properties and corrosion resistance, which can maintain the overall structural stability in the body for a long time. However, these metal materials cannot be degraded in the body after implantation, and remain permane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06C22B9/02A61L27/42A61L27/58A61L27/50
CPCA61L27/427A61L27/50A61L27/58A61L2430/02C22B9/026C22C1/03C22C23/00C22F1/06
Inventor 许春香刘燕萍张金山卜颖宏阎佩雯杨文甫
Owner TAIYUAN UNIV OF TECH
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