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Dispersion strengthened medical Mg-Zn-Ce-Ca-Mn alloy and preparation method thereof

A technology of dispersion strengthening and alloying, applied in medical science, prosthesis, etc., can solve problems such as little progress, improve mechanical properties and corrosion resistance, simplify process operation and equipment requirements, improve processing performance and mechanical properties Effect

Inactive Publication Date: 2014-04-30
南通河海大学海洋与近海工程研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the design and development of new biomedical magnesium alloys, most of the current research only considers binary alloys and has not made much progress. The influence of multi-element alloying on the comprehensive properties of medical magnesium alloys still needs to be studied urgently.

Method used

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  • Dispersion strengthened medical Mg-Zn-Ce-Ca-Mn alloy and preparation method thereof
  • Dispersion strengthened medical Mg-Zn-Ce-Ca-Mn alloy and preparation method thereof
  • Dispersion strengthened medical Mg-Zn-Ce-Ca-Mn alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. According to the design composition requirements of Mg-2.1Zn-1.4Ce-1.0Ca-0.5Mn medical magnesium alloy, high-purity magnesium (99.99%Mg), high-purity zinc (99.99%Zn), magnesium-cerium master alloy (containing 25%Ce ), magnesium-calcium master alloy (containing 32% Ca) and magnesium-manganese master alloy (containing 6% Mn) as raw materials, fully considering the element burning loss during the smelting process, the ratio of the addition amount of each raw material is calculated as 235:6:20 :10:30.

[0035]2. According to the composition design requirements of the new magnesium alloy described in 1, the melting and casting of the alloy and the solid solution and aging treatment of the cast slab are carried out, and the specific preparation steps are as follows:

[0036] 1) in SF 6 +CO 2 The Mg-Zn-Ce-Ca-Mn alloy ingot was smelted in a mixed protective atmosphere at a smelting temperature of 1033K, SF 6 +CO 2 The flow ratio of protective gas is 1:100 (flow rate SF ...

Embodiment 2

[0040] 1. According to the design composition requirements of Mg-2.0Zn-0.9Ce-0.9Ca-0.4Mn medical magnesium alloy, high-purity magnesium (99.99%Mg), high-purity zinc (99.99%Zn), magnesium-cerium master alloy (containing 25%Ce ), magnesium-calcium master alloy (containing 32% Ca) and magnesium-manganese master alloy (containing 6% Mn) as raw materials, fully considering the element burning loss during the smelting process, the ratio of the addition amount of each raw material is calculated as 245:6:14 :10:30.

[0041] 2. According to the composition design requirements of the new magnesium alloy described in 1, the melting and casting of the alloy and the solid solution and aging treatment of the cast slab are carried out, and the specific preparation steps are as follows:

[0042] 1) in SF 6 +CO 2 The Mg-Zn-Ce-Ca-Mn alloy ingot was smelted in a mixed protective atmosphere at a smelting temperature of 1033K, SF 6 +CO 2 The flow ratio of protective gas is 1:100 (flow rate SF ...

Embodiment 3

[0046] 1. According to the design composition requirements of Mg-1.9Zn-0.5Ce-0.9Ca-0.4Mn medical magnesium alloy, high-purity magnesium (99.99%Mg), high-purity zinc (99.99%Zn), magnesium-cerium master alloy (containing 25%Ce) ), magnesium-calcium master alloy (containing 32% Ca) and magnesium-manganese master alloy (containing 6% Mn) as raw materials, fully considering the element burning loss during the smelting process, the ratio of the addition amount of each raw material is calculated as 248:6:7 :10:30.

[0047] 2. According to the composition design requirements of the new magnesium alloy described in 1, the melting and casting of the alloy and the solid solution and aging treatment of the cast slab are carried out, and the specific preparation steps are as follows:

[0048] 1) in SF 6 +CO 2 The Mg-Zn-Ce-Ca-Mn alloy ingot was smelted in a mixed protective atmosphere at a smelting temperature of 1033K, SF 6 +CO 2 The flow ratio of protective gas is 1:100 (flow rate SF ...

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Abstract

The invention relates to an in-vivo degradable dispersion strengthened biomedical polynary magnesium alloy and a preparation method thereof. The in-vivo degradable dispersion strengthened biomedical polynary magnesium alloy comprises the following components in percentage by weight: 1.9-2.1% of Zn, 0.5-1.4% of Ce, 0.9-1.0% of Ca, 0.4-0.5% of Mn and the balance of Mg, and small and dispersed second phases are distributed in a magnesium matrix. An alloy cast ingot is firstly prepared by smelting according to design components, wherein the Ce can promote the second phases to realize intergranular discontinuous distribution, solution treatment is further performed to enable the second phases to be fully re-dissolved into a matrix phase, and then aging is performed to disperse and precipitate the small second phases in the magnesium matrix phase. Therefore, the obtained magnesium alloy has the advantages of high toughness, corrosion resistance, good biocompatibility and complete in-vivo degradation, and can be used for bone plates, bone nails, intravascular stents and other biological implants. The in-vivo degradable dispersion strengthened biomedical polynary magnesium alloy provided by the invention can significantly improve the defects of a microstructure of the magnesium alloy produced by a traditional melting and casting method, the effects are strengthened by aging precipitation of the small second phases, the processing properties and the mechanical properties are greatly upgraded, and the problem that the biological corrosion rate is too high in clinical applications is simultaneously solved. The process operation and the equipment requirements are simple, and industrial application prospects are good.

Description

1. Technical field [0001] The invention belongs to the technical field of bioalloy processing, and in particular relates to a dispersion-strengthened medical Mg-Zn-Ce-Ca-Mn alloy and a preparation method thereof. [0002] 2. Background technology [0003] Magnesium is an indispensable and important nutritional element for the human body. It has the characteristics of density and elastic modulus very close to the natural bone of the human body, high specific strength and specific stiffness, biodegradability and good biocompatibility. Medical fields such as intraosseous implants, bone tissue engineering scaffolds and cardiovascular stents have received extensive attention. Magnesium alloys are used to prepare implants with a short service life, which are gradually absorbed and metabolized through their biocorrosion degradation in the human body, which can reduce the pain caused by the second operation or the long-term retention of implant materials in the body. Therefore, it...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C1/02C22F1/06A61L27/04
Inventor 江静华宋丹马爱斌张凡郭光辉
Owner 南通河海大学海洋与近海工程研究院
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