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Dispersion strengthened medical mg-zn-ce-ca-mn alloy and preparation method thereof

A technology of dispersion strengthening and alloying, which is applied in the fields of medical science and prostheses, can solve the problems of little progress, and achieve the effect of improving mechanical properties and corrosion resistance, good biocompatibility, and good industrial application prospects.

Inactive Publication Date: 2016-09-07
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

[0027] 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 burning loss of elements during the smelting process, the ratio of the amount of each raw material added is 235:6:20 :10:30.

[0028] 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 billet are carried out. The specific preparation steps are as follows:

[0029] 1) In SF 6 +CO 2 Melting Mg-Zn-Ce-Ca-Mn alloy ingot in a mixed protective atmosphere, the melting temperature is 1033K, SF 6 +CO2 The flow ratio of shielding gas is 1:100 (flow rate SF 6 40ml / min, CO 2 4L / min), af...

Embodiment 2

[0032] 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 burning loss of elements during the smelting process, the calculated ratio of the amount of each raw material added is 245:6:14 :10:30.

[0033] 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 billet are carried out. The specific preparation steps are as follows:

[0034] 1) In SF 6 +CO 2 Melting Mg-Zn-Ce-Ca-Mn alloy ingot in a mixed protective atmosphere, the melting temperature is 1033K, SF 6 +CO 2 The flow ratio of shielding gas is 1:100 (flow rate SF 6 40ml / min, CO 2...

Embodiment 3

[0037] 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 burning loss of elements during the smelting process, the ratio of the amount of each raw material added is 248:6:7 :10:30.

[0038] 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 billet are carried out. The specific preparation steps are as follows:

[0039] 1) In SF 6 +CO 2 Melting Mg-Zn-Ce-Ca-Mn alloy ingot in a mixed protective atmosphere, the melting temperature is 1033K, SF 6 +CO 2 The flow ratio of shielding gas is 1:100 (flow rate SF 6 40ml / min, CO 2 4L / min), a...

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Abstract

The invention relates to an in vivo degradable dispersion-strengthened biomedical multi-element magnesium alloy and a preparation method thereof. The weight percentage of its components is: Zn 1.9-2.1%, Ce 0.5-1.4%, Ca 0.9-1.0%, Mn 0.4-0.5%, and the rest is Mg; a finely dispersed second phase is distributed in the magnesium matrix. First, the alloy ingot is melted according to the designed composition, in which Ce promotes the discontinuous distribution of the second phase along the crystal, and then the second phase can be fully dissolved into the matrix phase after solid solution treatment, and then the aging will make the fine second phase in the magnesium matrix phase. Dispersed precipitation in the interior. The obtained magnesium alloy has the advantages of high strength and toughness, corrosion resistance, good biocompatibility, and complete degradation in vivo, and can be used for biological implants such as bone plates, bone nails, and intravascular stents. The invention can significantly improve the microstructural defects of magnesium alloys produced by traditional melting and casting methods. Through the aging precipitation strengthening effect of the fine second phase, while greatly improving its processing performance and mechanical properties, it can solve the excessively fast biological corrosion rate in its clinical application. question. Its process operation and equipment requirements are simple, and it has a good industrial application prospect.

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. 2. Background technology [0002] 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, its clinical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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