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A kind of preparation method of degradable layered zn-mg composite material

A composite material, zn-mg technology, applied in metal material coating technology, surgery, medical science, etc., can solve the problems of slow degradation of zinc alloy, high elastic modulus, too fast corrosion of magnesium alloy, etc., and achieve low elastic modulus The effect of high volume, good biocompatibility, and good degradability

Active Publication Date: 2019-11-08
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of a single degradable metal, that is, the problems of too fast corrosion of magnesium alloys, slow degradation of zinc alloys, and excessively high elastic modulus, and provide a degradable metal that meets the requirements for the clinical application of degradable metals. Layered Zn-Mg composite material and its preparation method

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  • A kind of preparation method of degradable layered zn-mg composite material

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Embodiment 1

[0032] A degradable layered Zn-Mg composite material and its preparation method. The outer layer of the layered medical metal composite material is pure zinc, the core is pure magnesium, the total volume ratio of zinc is 50%, and the balance is pure magnesium . Extruded layered Zn-Mg composites were prepared by layered casting and nested extrusion, and then the circular cross-sections at both ends of the extruded layered Zn-Mg composites were fluorinated. The steps are as follows:

[0033] 1) at 10 -3Pass high-purity argon (99.99%) protective atmosphere under Pa vacuum condition, heat the base metal to 480°C to melt, stir with a stirring paddle for 5 minutes, let it stand for 3 minutes, and then cast it into a copper mold with a diameter of 60mm at 480°C In the casting mold, a cylindrical zinc ingot is obtained. The base metal is pure zinc, and the mass of pure zinc element is 3.3Kg.

[0034] 2) Pull out a barrel-shaped zinc ingot mold with an inner diameter of 42mm, a wal...

Embodiment 2

[0042] A kind of degradable layered Zn-Mg composite material and preparation method thereof, the outer layer of the layered medical metal composite material is pure zinc, the core is Mg-3(wt%)Zn-0.2(wt%)Ca alloy, zinc The total volume ratio is 30.5%, and the balance is magnesium alloy. The extruded degradable layered Zn-Mg composites were prepared by layered casting and nested extrusion, and then the circular cross-sections at both ends of the layered Zn-Mg composites were fluorinated. The steps are as follows:

[0043] 4) at 10 -3 Pass high-purity argon (99.99%) protective atmosphere under Pa vacuum condition, heat the base metal to 480°C to melt, stir with a stirring paddle for 5 minutes, let it stand for 3 minutes, and then cast it into a copper mold with a diameter of 60mm at 480°C In the casting mold, a cylindrical zinc ingot is obtained. The base metal is pure zinc, and the mass of pure zinc element is 3.3Kg.

[0044] 5) Take out a barrel-shaped zinc ingot casting mo...

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Abstract

The invention discloses a degradable lamellar Zn-Mg composite material and a preparation method thereof. The outer layer of a lamellar medical metal composite material is made of pure zinc or zinc alloy, and the core part of the lamellar medical metal composite material is made of pure magnesium or magnesium alloy; the ratio of zinc or zinc alloy and magnesium or magnesium alloy is calculated according to volume percentage, zinc or zinc alloy accounts for 20%-50% of the total volume of the material, and the balance is magnesium or magnesium alloy. The lamellar composite material is prepared bycombining layered casting with nested extruding. The degradable lamellar Zn-Mg composite material has the advantages that: the selected magnesium alloy and the selected zinc alloy have good biocompatibility and degradability; mechanical properties and a degradation rate of the integral composite material are controlled by controlling a relative thickness of a Zn layer to a Mg layer, so that the composite material adapts to a service environment, and therefore, a condition that single metal is too quick or too slow in degradation is solved. The material design and the preparation method are simple and convenient, and the cost is low, so that industrial production is facilitated.

Description

technical field [0001] The invention relates to the preparation of degradable biomedical metal materials, in particular to a degradable layered Zn-Mg composite material and its preparation method Background technique [0002] The research on zinc alloy as a degradable medical metal material is late, and most of the research focuses on the alloying and compounding of zinc. Zinc and zinc alloys, as degradable medical materials, have the same elemental safety as magnesium alloys, and are also essential nutrients for the human body. The self-corrosion potential of zinc (-0.736V / SCE) is higher than that of magnesium (-2.34V / SCE), and its electrochemical activity is much weaker than that of magnesium, so zinc has stronger corrosion resistance than magnesium. Implantation experiments also verified that its degradation rate met the implantation requirements. However, the elastic modulus of zinc or zinc alloy is relatively high, which is 104.5GPa, more than double that of magnesium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16C23C22/34C22C18/00C22C23/00C22C23/04A61L31/12A61L31/02A61L31/14
CPCA61L31/022A61L31/14A61L31/148B22D19/16C22C18/00C22C23/00C22C23/04C23C22/34
Inventor 刘德宝袁强许广全陈民芳
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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