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Biological magnesium alloy with mold resistance 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 loss of antibacterial properties, poor coating interface bonding ability, coating peeling, etc., and achieves sustained and efficient antibacterial effect. The effect of continuous high-efficiency antibacterial effect

Inactive Publication Date: 2018-02-27
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 ~ 70μm) and 0.1 grams of nano silver powder (particle size ~ 30nm), and put them into a ball mill with argon gas for 3 hours at a rotation speed of 250 rad / min to obtain dispersion Uniform nano-silver / Mg-6Zn mixed powder. The composite powder is laid by the pre-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, and the powder thickness is 0.15mm, H 2 O and O 2 At a concentration of less than 25 ppm and an argon atmosphere pressure of 5 MPa, a laser is used to selectively scan the composite powder, and the nano-silver / biomagnesium alloy is formed through a layer-by-layer process.

[0030] The test found that the average grain size of the Mg-6Zn alloy matrix is ​​4μm (the grain size is 17μm when nano-silver is not added). The introduction of nano-silver significantly refines the grai...

Embodiment 2

[0032] Weigh 9.85 grams of Mg-6Zn alloy powder (particle size ~ 70μm) and 0.15 grams of nano silver powder (particle size ~ 30nm), and put them into a ball mill ventilated with argon for 3 hours at a speed of 250rad / min to obtain dispersion Uniform nano-silver / Mg-6Zn mixed powder. The composite powder is laid by a 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 0.10 mm, and the powder thickness is 0.15mm, H 2 O and O 2 At a concentration of less than 25 ppm and an argon atmosphere pressure of 5 MPa, a laser is used to selectively scan the composite powder, and the nano-silver / biomagnesium alloy is formed through a layer-by-layer process.

[0033] The test found that the average grain size of the Mg-6Zn alloy matrix is ​​5μm (the grain size is about 17μm when nano-silver is not added). The introduction of nano-silver significantly re...

Embodiment 3

[0035] Weigh 9.95 grams of Mg-6Zn alloy powder (particle size ~ 70μm) and 0.05 grams of nano silver powder (particle size ~ 30nm), and put them into an argon-passed ball mill for 3 hours at a speed of 250rad / min to obtain dispersion Uniform nano-silver / Mg-6Zn mixed powder. The composite powder is laid by a 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, and the powder thickness is 0.15mm, H 2 O and O 2 The concentration is lower than 25ppm, the pressure of argon atmosphere is 5MPa, the composite powder is selectively scanned by laser, and the nano-silver / biomagnesium alloy is formed by layer-by-layer process.

[0036] The test found that the average grain size of the Mg-6Zn alloy matrix is ​​9μm (the grain size is about 17μm when nano-silver is not added). The introduction of nano-silver refines the grain size of the Mg-6Zn ...

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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 biological magnesium alloy preparation, and particularly relates to a biological magnesium alloy with antibacterial properties and a preparation method thereof. Background technique [0002] Biomagnesium alloys have the advantages of good biocompatibility, degradability in the human environment, and similar density and modulus to human bones, and have gained more and more attention in the field of bone repair. Compared with traditional medical metals, the biggest advantage of bio-magnesium alloy as an implant is that it can be degraded in the human body and absorbed by the body's metabolism, thus avoiding secondary operations that cause additional harm to the patient. However, in the application of bone repair, the implant also needs to have antibacterial properties to avoid bacterial infection in the graft wound. Although the microalkaline environment formed by the degradation of biomagnesium alloy has certai...

Claims

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Application Information

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Patent Type & Authority Applications(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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