Biological medicinal Mg-Sn-Zn-Ca magnesium alloy and preparation method thereof

A biomedical and magnesium alloy technology, applied in the biomedical field, can solve the problems of not meeting the requirements of biocompatibility, chronic neurotoxicity of Al element, localized corrosion, etc., and achieve inhibition of galvanic corrosion, grain refinement, and improvement The effect of corrosion resistance

Inactive Publication Date: 2018-08-21
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scholars at home and abroad have carried out a lot of research on bio-magnesium alloy materials, but there is still a certain distance between them and clinical applications. The main obstacles are: (1) the alloying elements in some magnesium alloys are potentially toxic; (2) in the body fluid environment Among them, the degradation rate of magnesium alloy is too fast, and severe localized corrosion is prone to occur.
[0004] Most of the early bio-magnesium alloy research directly used commercial magnesium alloys, such as the most common Mg-Al alloys, but the Al element has chronic neurotoxicity and may cause senile dementia, which does not meet the requirements of biocompatibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The magnesium alloy described in this embodiment is composed of Mg, Sn, Zn and Ca elements, and the mass percent content of each component is: 0.5% Sn, 0.3% Zn, 0.3% Ca, and the impurity elements Si, Fe, Cu and Ni The total amount is less than 0.02%, and the balance is Mg.

[0026] The preparation method of the alloy includes three process steps of smelting, solution heat treatment and plastic deformation.

[0027] Among them, the previous smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows: melt pure magnesium in a crucible resistance furnace, add pure tin and pure zinc when the temperature rises to 730°C, stir for 10 minutes after melting; then add pure calcium, continue stirring for 10 minutes to make The alloying elements are evenly distributed. Cool down to 720°C and keep it warm for 10 minutes, remove the scum on the surface, and pour it into a metal mold preheated to 200°C.

[0028] The subsequent solutio...

Embodiment 2

[0032] The magnesium alloy described in this embodiment is composed of Mg, Sn, Zn and Ca elements, and the mass percentage content of each component is: 1.0% Sn, 0.5% Zn, 0.2% Ca, impurity elements Si, Fe, Cu and Ni The total amount is less than 0.02%, and the balance is Mg.

[0033] The preparation method of the alloy includes three process steps of smelting, solution heat treatment and plastic deformation.

[0034] Among them, the previous smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows: melt pure magnesium in a crucible resistance furnace, add pure tin and pure zinc when the temperature rises to 730°C, stir for 10 minutes after melting; then add pure calcium, continue stirring for 10 minutes to make The alloying elements are evenly distributed. Cool down to 720°C and keep it warm for 10 minutes, remove the scum on the surface, and pour it into a metal mold preheated to 200°C.

[0035] The subsequent solution hea...

Embodiment 3

[0039] The magnesium alloy described in this embodiment is composed of Mg, Sn, Zn and Ca elements, and the mass percent content of each component is: 1.5% Sn, 0.7% Zn, 0.1% Ca, impurity elements Si, Fe, Cu and Ni The total amount is less than 0.02%, and the balance is Mg.

[0040] The preparation method of the alloy includes three process steps of smelting, solution heat treatment and plastic deformation.

[0041] Among them, the previous smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows: melt pure magnesium in a crucible resistance furnace, add pure tin and pure zinc when the temperature rises to 730°C, stir for 10 minutes after melting; then add pure calcium, continue stirring for 10 minutes to make The alloying elements are evenly distributed. Cool down to 720°C and keep it warm for 10 minutes, remove the scum on the surface, and pour it into a metal mold preheated to 200°C.

[0042] The subsequent solution heat t...

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Abstract

The invention belongs to the technical field of magnesium alloy materials and in particular relates to a biological medicinal Mg-Sn-Zn-Ca magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components in percentage by weight: 0.5-1.5% of Sn, 0.3-0.7% of Zn, 0.1-0.3% of Ca, impurity elements, namely Si, Fe, Cu and Ni of which the total amount is less than 0.02%, and the balance of Mg. The preparation method comprises the following steps: firstly, mixing and melting different components, performing solid solution heat treatment, and finally performing molding deformation. The magnesium alloy provided by the invention comprises multiple trace elements essential for human bodies, multi-element microalloying is carried out, and the material is non-toxic, good in corrosion resistance and high in toughness, and can be degraded by human bodies.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy materials, in particular to a biomedical [0002] Mg-Sn-Zn-Ca magnesium alloy and its preparation method. Background technique [0003] A large number of bone injuries caused by traffic accidents and sports have brought huge market space and prospects for biological implant materials, which has greatly promoted the development of biological implant materials. Traditional metal bioimplantation materials such as stainless steel and titanium alloys have been widely used in clinical practice, but they also have some disadvantages. Compared with traditional metal materials such as stainless steel and titanium alloy, magnesium alloy has a series of unique advantages as a bioimplantation material: (1) magnesium alloy has good biocompatibility, and Mg is second only to Ca, The constant metal elements of Na and K can activate a variety of enzymes and participate in a series of metabolic processes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02C22F1/06
CPCC22C23/00C22C1/02C22F1/06
Inventor 张扬宋雷鹏陈晓阳卢雅琳丛孟启李小平
Owner JIANGSU UNIV OF TECH
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