Biomedical degradable Mg-Zn-Zr-Sc alloy and preparation method thereof

A biomedical and alloy technology, applied in the field of biomaterials, achieves the effects of safety, reliability, excellent performance, and easy large-scale industrial production

Active Publication Date: 2014-06-25
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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[0007] At present, there are no literatures and patents at home an

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  • Biomedical degradable Mg-Zn-Zr-Sc alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] The raw materials are Mg with purity ≥99.99%, Zn with purity ≥99.995%, Mg-30%Zr master alloy with purity ≥99.8%, and magnesium-scandium master alloy with purity ≥99.8%. The nominal composition is calculated as: Zn1. 5%, Zr0.6%, Sc0.3%, and the rest are alloyed with Mg. First, Mg is heated and melted in a crucible by a resistance furnace. The protective atmosphere used is a mixed gas with a volume percentage of sulfur hexafluoride: carbon dioxide = 1:100. When the melt temperature is 720 ° C, Zn is added to the crucible and the temperature is raised to 750 Then add Mg-30%Zr master alloy at ℃, then raise the temperature to 780℃, add magnesium-scandium master alloy and keep it warm for 30min, then cool down to 740℃, after stirring for 1min and standing for 3min, melt the melt at a volume percentage of 6 Sulfur fluoride: carbon dioxide = 1:100 is cast into a permanent mold with a preheating temperature of 200°C under a protective atmosphere to obtain a magnesium alloy ingot...

Embodiment 2

[0032] The raw materials are Mg with purity ≥99.99%, Zn with purity ≥99.995%, Mg-30%Zr master alloy with purity ≥99.8%, and magnesium-scandium master alloy with purity ≥99.8%. The nominal composition is calculated as: Zn1. 5%, Zr0.6%, Sc0.5%, and the rest are alloyed with Mg. First, Mg is heated and melted in a crucible by a resistance furnace. The protective atmosphere used is a mixed gas with a volume percentage of sulfur hexafluoride: carbon dioxide = 1:100. When the melt temperature is 720 ° C, Zn is added to the crucible and the temperature is raised to 750 Then add Mg-30%Zr master alloy at ℃, then raise the temperature to 780℃, add magnesium-scandium master alloy and keep it warm for 30min, then cool down to 740℃, after stirring for 1min and standing for 3min, melt the melt at a volume percentage of 6 Sulfur fluoride: carbon dioxide = 1:100 is cast into a permanent mold with a preheating temperature of 200°C under a protective atmosphere to obtain a magnesium alloy ingot...

Embodiment 3

[0034] The raw materials are Mg with purity ≥99.99%, Zn with purity ≥99.995%, Mg-30%Zr master alloy with purity ≥99.8%, and magnesium-scandium master alloy with purity ≥99.8%. The nominal composition is calculated as: Zn1. 5%, Zr0.6%, Sc1%, and the rest are alloyed with Mg. First, Mg is heated and melted in a crucible by a resistance furnace. The protective atmosphere used is a mixed gas with a volume percentage of sulfur hexafluoride: carbon dioxide = 1:100. When the melt temperature is 720 ° C, Zn is added to the crucible and the temperature is raised to 750 Then add Mg-30%Zr master alloy at ℃, then raise the temperature to 780℃, add magnesium-scandium master alloy and keep it warm for 30min, then cool down to 740℃, after stirring for 1min and standing for 3min, melt the melt at a volume percentage of 6 Sulfur fluoride: carbon dioxide = 1:100 is cast into a permanent mold with a preheating temperature of 200°C under a protective atmosphere to obtain a magnesium alloy ingot. ...

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Abstract

The invention provides a biomedical degradable Mg-Zn-Zr-Sc alloy and a preparation method thereof. The alloy comprises the following components in percentage by mass: greater than or equal to 0.5% and less than or equal to 2% of Zn, greater than or equal to 0.3% and less than or equal to 0.8% of Zr, greater than 0% and less than or equal to 10% of Sc, and the balance of Mg. By utilizing the characteristics of favorable compatibility and high degradability of Mg in organisms, the Zn, Zr and Sc are reasonably added to further regulate and optimize the mechanical properties and corrosion resistance of Mg; and the alloy is prepared by a casting technique with lower cost. The Mg-Zn-Zr-Sc alloy does not have precipitated phase, and thus, is beneficial to inhibiting the couple corrosion, so the corrosion mode is uniform corrosion; the alloy has excellent corrosion resistance and favorable mechanical properties, and can be used in the fields of degradable bone plates, bone nails, vessel interventional therapy stents and other biological materials.

Description

technical field [0001] The invention relates to a biomedical degradable Mg-Zn-Zr-Sc alloy and a preparation method thereof, belonging to the field of biological materials. Background technique [0002] The world's annual bone damage caused by traffic accidents and sports, the high incidence of cardiovascular disease caused by the global aging phenomenon, the prosperity of plastic surgery and the improvement of people's ability to pay have greatly stimulated biological implants. The development of materials, bio-implantation materials show huge market potential and development prospects. At present, the biological implant materials widely used in clinic mainly include stainless steel, cobalt-chromium alloy and titanium alloy. These implant materials are all non-degradable materials. After the function of human tissue is restored, the implant has to be removed after a second operation. , which not only increases medical costs but also increases patient suffering. Therefore, ...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C1/03
Inventor 王西涛李涛张海龙何勇
Owner UNIV OF SCI & TECH BEIJING
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