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A kind of antibacterial and degradable zn-cu-ag alloy and preparation method thereof

A technology of zn-cu-ag and alloy, which is applied in surgery, medical science, etc., can solve the problems of low mechanical properties of pure zinc, which cannot be achieved, and achieve enhanced biological antibacterial effect, convenient operation, and reduced cell or tissue infection. The effect of frequency

Active Publication Date: 2022-05-24
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Zn as a degradable metal implant material has many advantages compared with other metal materials, but the mechanical properties of pure zinc are low, the strength is only 40MPa, and it shows brittleness, which cannot meet the requirements of implant materials; using alloying, Homogenization treatment and other methods are very effective to improve the mechanical properties of zinc matrix. At present, the alloying elements of zinc alloy are mainly: Al, Mg, Cu, Ti, Pb, Cd, Ag, Zr, etc.; in order to meet the requirements of medical implant materials , the alloy elements used not only need to meet the mechanical properties, but also require the alloy to be harmless to human health and have good biocompatibility to ensure that the ions decomposed by the alloy in the human body are non-toxic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare pure zinc, copper wire and silver wire as raw materials; among them, Cu accounts for 2% of the total mass of all raw materials, Ag accounts for 2% of the total mass of all raw materials, and the rest is Zn; the purity of pure zinc is ≥99.98%, copper wire and silver wire The purity of all ≥99.99%;

[0043] Under argon atmosphere, pure zinc is placed in a crucible and heated to 580°C to form a zinc melt;

[0044] Under the condition of argon atmosphere, the copper wire was added to the zinc melt, and the zinc melt was heated to 650 ℃ under electromagnetic stirring conditions, and then kept for 8 minutes. At this time, the copper wire was melted to form a zinc-copper melt;

[0045] Under the condition of argon atmosphere, silver wire was added to the zinc-copper melt, and then electromagnetically stirred for 10 min. At this time, the silver wire was melted to form a zinc-copper-silver melt;

[0046] The above-mentioned copper wire and silver wire are respectively ad...

Embodiment 2

[0052] The method is the same as in Example 1, except that:

[0053] (1) raw material wherein Cu accounts for 2% of the total mass of the entire raw material, and Ag accounts for 3% of the total mass of the entire raw material;

[0054] (2) The temperature of zinc melt is 630℃;

[0055] (3) The zinc melt is heated to 680°C and kept for 5min;

[0056] (4) electromagnetic stirring for 5min after adding silver wire;

[0057] (5) Keep the copper wire and the silver wire pressed for 2min;

[0058] (6) Let stand for 15 minutes in the stand-still furnace, and the argon gas pressure in the stand-still furnace is 0.1-0.15MPa; the temperature of the zinc-copper-silver melt when introduced into the stand-still furnace is 650°C;

[0059] (7) Solution treatment temperature is 360°C and time is 20h;

[0060] (8) The yield strength of the antibacterial and degradable Zn-Cu-Ag alloy (Zn-2Cu-3Ag alloy) is 175MPa, the tensile strength is 255MPa, and the elongation is 89%.

Embodiment 3

[0062] The method is the same as in Example 1, except that:

[0063] (1) Raw materials wherein Cu accounts for 2% of the total mass of all raw materials, and Ag accounts for 4% of the total mass of all raw materials;

[0064] (2) Zinc melt temperature 590℃;

[0065] (3) The zinc melt is heated to 660°C and then kept for 7min;

[0066] (4) electromagnetic stirring 9min after adding silver wire;

[0067] (5) Keep the copper wire and the silver wire pressed for 2min;

[0068] (6) Let stand for 15-20 minutes in the stand-still furnace, and the argon gas pressure in the stand-still furnace is 0.1-0.15MPa; the temperature of the zinc-copper-silver melt when introduced into the stand-still furnace is 640°C;

[0069] (7) Solution treatment temperature is 380℃, time is 16h;

[0070] (8) The yield strength of the antibacterial and degradable Zn-Cu-Ag alloy (Zn-2Cu-4Ag alloy) is 176MPa, the tensile strength is 255MPa, and the elongation is 88%.

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Abstract

An antibacterial and degradable Zn-Cu-Ag alloy and its preparation method, the alloy contains 2-4% Cu, 0.1-5% Ag, and the balance is Zn and unavoidable impurities according to the mass percentage; the yield strength is 175-185MPa , the tensile strength is 255-270MPa, and the elongation is 74-90%; the method is: (1) prepare the raw materials; (2) heat the pure zinc in a protective atmosphere to form a zinc melt; (3) heat up to 650-680 after adding copper wire (4) add silver wire and stir for 5-10 minutes; (5) after degassing and slag removal, then import it into a standing furnace, and cast after standing; (6) heat at 350-420°C for 6-24 hours Solution treatment, water quenching to room temperature. The method of the invention is simple, easy to operate, reduces energy consumption, has few defects in alloy products, and is suitable for mass promotion.

Description

technical field [0001] The invention relates to metal and belongs to the field of medical metal materials and preparation thereof, in particular to an antibacterial and degradable Zn-Cu-Ag alloy and a preparation method thereof. Background technique [0002] As a new type of biodegradable medical metal material, zinc alloy has the advantages of easy processing, low price and good biocompatibility. The research of traditional medical degradable metal materials mainly focuses on iron-based alloys and magnesium-based alloys. However, due to the fast corrosion rate of magnesium-based alloys and the obvious side effects of iron-based alloys, the above two alloys are limited in medical metal materials. aspects of applications. The standard electrode potentials of magnesium and iron are -2.372V and -0.440V respectively, and the standard electrode potential of zinc is between magnesium and iron, which is -0.762V, so the corrosion rate of zinc and zinc alloys is theoretically faster...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/02C22C18/00C22C1/02B22D7/00C22F1/16C21D1/18A61L31/02A61L31/14A61L31/16
CPCC22C18/02C22C18/00C22C1/02B22D7/005C22F1/165C22F1/002A61L31/022A61L31/148A61L31/16A61L2300/404A61L2300/104A61L2300/102
Inventor 张海涛杨东辉王方圆冯雷雷吴子彬邹晶秦克崔建忠
Owner NORTHEASTERN UNIV LIAONING
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