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Medical biodegradable zinc alloy and preparation method thereof

A zinc alloy, biological technology, applied in the field of materials, can solve the problems of limiting the scope of application, increasing the production of inflammation, low mechanical properties of polymer materials, etc., to achieve the effect of reducing pain and trouble, and avoiding infection

Active Publication Date: 2015-02-04
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degradable implant materials currently used in clinical practice mainly include polymer materials and bioactive ceramic materials, but these degradable materials still have obvious defects: the mechanical properties of polymer materials are too low, and the acidic environment generated by degradation will increase the degree of inflammation. Possibility; the plasticity and toughness of bioactive ceramics are poor, which limits its application range
However, the mechanical properties of pure zinc are poor, and the strength and plasticity cannot meet the requirements of implant materials.

Method used

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  • Medical biodegradable zinc alloy and preparation method thereof
  • Medical biodegradable zinc alloy and preparation method thereof
  • Medical biodegradable zinc alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The composition contains Mg 0.05%, Ag 0.5%, Ca 0.1%, Mn 0.1% by weight percentage, unavoidable impurities ≤ 0.2%, and the balance is Zn;

[0040] Metal zinc, metal magnesium, metal silver, metal calcium and metal manganese are used as raw materials; pure metal zinc is heated to 520±5°C, and metal manganese, metal silver, metal calcium and metal magnesium are added sequentially after the metal zinc is melted, and when all the metal After melting, stir until evenly mixed to obtain alloy melt;

[0041] Cool the alloy melt to 460±5°C, press hexachloroethane into the alloy melt using a graphite bell jar, the pressed hexachloroethane is 0.2% of the total weight of the alloy melt, and then heat the alloy at 460±5°C Keep warm for 20 minutes;

[0042] After the heat preservation and standing, the alloy melt is cooled to 440±5°C and cast into a mold, and the mold is cooled by water during the casting process to obtain an ingot;

[0043] The ingot is kept at 300°C±5 for 100 minute...

Embodiment 2

[0048] The composition contains Mg 1%, Ag 0.01%, Ca 0.5%, Mn 0.01% by weight percentage, unavoidable impurities ≤ 0.2%, and the balance is Zn;

[0049] Metal zinc, metal magnesium, metal silver, metal calcium and metal manganese are used as raw materials; pure metal zinc is heated to 520±5°C, and metal manganese, metal silver, metal calcium and metal magnesium are added sequentially after the metal zinc is melted, and when all the metal After melting, stir until evenly mixed to obtain alloy melt;

[0050] Cool the alloy melt to 460±5°C, press hexachloroethane into the alloy melt using a graphite bell jar, the pressed hexachloroethane is 0.25% of the total weight of the alloy melt, and then heat the alloy at 460±5°C Keep warm for 10 minutes;

[0051] After the heat preservation and standing, the alloy melt is cooled to 440±5°C and cast into a mold, and the mold is cooled by water during the casting process to obtain an ingot;

[0052] The ingot is kept at 300°C ± 5 for 150 mi...

Embodiment 3

[0057] The composition contains Mg 0.005%, Ag 0.1%, Ca 0.15%, Mn 0.15% by weight percentage, unavoidable impurities ≤ 0.2%, and the balance is Zn;

[0058] Metal zinc, metal magnesium, metal silver, metal calcium and metal manganese are used as raw materials; pure metal zinc is heated to 520±5°C, and metal manganese, metal silver, metal calcium and metal magnesium are added sequentially after the metal zinc is melted, and when all the metal After melting, stir until evenly mixed to obtain alloy melt;

[0059] Cool the alloy melt to 460±5°C, press hexachloroethane into the alloy melt using a graphite bell jar, the pressed hexachloroethane is 0.3% of the total weight of the alloy melt, and then heat the alloy at 460±5°C Keep warm for 20 minutes;

[0060] After the heat preservation and standing, the alloy melt is cooled to 440±5°C and cast into a mold, and the mold is cooled by water during the casting process to obtain an ingot;

[0061] The ingot is kept at 300°C±5 for 200 m...

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Abstract

The invention discloses a medical biodegradable zinc alloy and a preparation method thereof, belonging to the technical field of materials. The medical biodegradable zinc alloy comprises the following components in percentage by weight: 0.005-1% of Mg, 0.01-0.5% of Ag, 0.01-0.5% of Ca, 0.01-0.5% of Mn, less than or equal to 0.2% of inevitable impurities and the balance of Zn. The preparation method comprises the following steps: (1) heating pure metal zinc to be 520+ / -5 DEG C, dissolving, sequentially adding manganese metal, metallic silver, calcium metal and magnesium metal, and stirring till the components are uniformly mixed; (2) cooling to be 460+ / -5 DEG C, pressing hexachloroethane, keeping the temperature, and standing for 10-20 minutes; (3) keeping and reducing the temperature to be 440+ / -5 DEG C, and casting; (4) keeping the temperature to be 300+ / -5 DEG C for 100-200 minutes, heating to be 330-360 DEG C, keeping the temperature for 3-5 hours, and further water-cooling to be normal temperature; (5) keeping the temperature to be 150-350 DEG C for 20-40 minutes, subsequently performing high-temperature deformation, and air-cooling to be normal temperature; and (6) performing multiple times of normal temperature deformation-intermediate annealing, and finally air-cooling to be the normal temperature. The zinc alloy disclosed by the invention can be used for preparing various degradable medical devices which can meet different clinical use requirements.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a medical biodegradable zinc alloy and a preparation method thereof. Background technique [0002] Due to their good mechanical properties and processing properties, metal materials have become widely used implant materials in clinical practice, mainly including pure metals (tantalum, niobium, zirconium, etc.), stainless steel, titanium alloys, cobalt-based alloys, shape memory alloys, precious metals, etc. These materials have good corrosion resistance and can remain stable for a long time after being implanted in the human body; but they also bring some problems, such as the need for secondary surgery to remove; the release of alloy elements may cause potential harm to the human body and other adverse effects. [0003] In order to avoid the problems caused by the above-mentioned implant materials, a technique of using degradable implant materials has been proposed...

Claims

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Application Information

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IPC IPC(8): C22C18/00C22F1/16
Inventor 秦高梧王利卿肖驰王欢任玉平李松左良
Owner NORTHEASTERN UNIV
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