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A kind of biological magnesium alloy with antibacterial properties and preparation method thereof

A magnesium alloy and biological technology, which is applied in the field of biological magnesium alloys with antibacterial properties and its preparation, can solve the problems of coating peeling, loss of antibacterial properties, poor interface bonding ability of coatings, etc., so as to prevent the growth of crystal grains. , The antibacterial effect is sustained and efficient, the effect of sustained and efficient antibacterial effect

Inactive Publication Date: 2019-04-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the method of surface coating is mostly used for the composite of nano-silver and bio-magnesium alloy, but because of the poor interfacial bonding ability of the coating, it is easy to cause the coating to fall off, and the nano-silver / bio-magnesium alloy prepared by the surface coating method is in the Antimicrobial properties are lost as the coating degrades

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 9.9 grams of Mg-6Zn alloy powder (particle size ~ 70 μm) and 0.1 gram of nano-silver powder (particle size ~ 30nm), and put them into a ball mill with argon gas for 3 hours at the same time, and the speed is 250rad / min to obtain a dispersed Uniform nano-silver / Mg-6Zn mixed powder. The composite powder is laid by the preset powder spreading process. According to the pre-designed structure requirements, the laser power is 75W, the scanning speed is 150mm / min, the spot diameter is 0.065mm, the scanning distance is 0.10mm, the powder spreading thickness is 0.15mm, H 2 O and O 2 The concentration is lower than 25ppm, and the argon atmosphere pressure is 5MPa, the composite powder is selectively scanned by laser, and the nano-silver / biological magnesium alloy is formed by layer-by-layer superposition process.

[0030] The test found that the average grain size of the Mg-6Zn alloy matrix was 4 μm (the grain size was 17 μm when no nano-silver was added), and the introduc...

Embodiment 2

[0032]Weigh 9.85 grams of Mg-6Zn alloy powder (particle size ~ 70 μm) and 0.15 grams of nano-silver powder (particle size ~ 30nm), and put them into a ball mill with argon gas for 3 hours at a speed of 250 rad / min to obtain a dispersed Uniform nano-silver / Mg-6Zn mixed powder. The composite powder is laid by the preset powder spreading process. According to the pre-designed structure requirements, the laser power is 75W, the scanning speed is 150mm / min, the spot diameter is 0.065mm, the scanning distance is 0.10mm, the powder spreading thickness is 0.15mm, H 2 O and O 2 The concentration is lower than 25ppm, and the argon atmosphere pressure is 5MPa, the composite powder is selectively scanned by laser, and the nano-silver / biological magnesium alloy is formed by layer-by-layer superposition process.

[0033] The test found that the average grain size of the Mg-6Zn alloy matrix was 5 μm (the grain size was about 17 μm when no nano-silver was added), and the introduction of nano...

Embodiment 3

[0035] Weigh 9.95 grams of Mg-6Zn alloy powder (particle size ~ 70 μm) and 0.05 gram of nano-silver powder (particle size ~ 30nm), and put them into a ball mill with argon gas for 3 hours at the same time, and the speed is 250rad / min to obtain a dispersed Uniform nano-silver / Mg-6Zn mixed powder. The composite powder is laid by the preset powder spreading process. According to the pre-designed structure requirements, the laser power is 78W, the scanning speed is 160mm / min, the spot diameter is 0.065mm, the scanning distance is 0.10mm, the powder spreading thickness is 0.15mm, H 2 O and O 2 The concentration is lower than 25ppm, and the argon atmosphere pressure is 5MPa, the composite powder is selectively scanned by laser, and the nano-silver / biological magnesium alloy is formed by layer-by-layer superposition process.

[0036] The test found that the average grain size of the Mg-6Zn alloy matrix was 9 μm (the grain size was about 17 μm when no nano-silver was added), and the ...

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Abstract

The invention discloses biological magnesium alloy with mold resistance. The biological magnesium alloy is composed of a biological magnesium alloy matrix and nano-silver evenly distributed in the magnesium alloy matrix, wherein the mass percent of nano-silver is 0.5-1.5%, preferentially, 0.75-1.25% and is 1% further preferentially. The invention further discloses a method for preparing the biological magnesium alloy with mold resistance. The method comprises the steps that 1, a specific amount of nano-silver powder and magnesium alloy powder are subjected to ball milling in a ball milling machine to obtain evenly-mixed mixed powder; and 2, the mixed powder is used as raw materials, and the biological magnesium alloy with mold resistance is prepared through laser selective melting. The nano-silver is added into the magnesium alloy matrix in a second phase mode, and mold resistance exists in the whole degradation process of the biological magnesium alloy.

Description

technical field [0001] The invention belongs to the technical field of bio-magnesium alloy preparation, and in particular relates to a bio-magnesium alloy with antibacterial properties and a preparation method thereof. Background technique [0002] Biomagnesium alloys have attracted more and more attention in the field of bone repair due to their good biocompatibility, degradability in the human environment, and similar density and modulus to human bone. Compared with traditional medical metals, the biggest advantage of bio-magnesium alloys as implants is that they can be degraded in the human body and absorbed by the body's metabolism, thus avoiding secondary operations that cause additional harm to patients. However, in the application of bone repair, the implant needs to have antibacterial properties to avoid bacterial infection of the implanted wound. Although the slightly alkaline environment formed by the degradation of bio-magnesium alloys has certain antibacterial ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/04B33Y10/00
CPCB33Y10/00C22C1/0408C22C23/00
Inventor 帅词俊高成德
Owner CENT SOUTH UNIV
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