Biological magnesium alloy containing rich LPSO structures and preparing method of biological magnesium alloy

A magnesium alloy and biological technology, applied in the field of biological magnesium alloy and its preparation, can solve the problems of low structure content of LPSO and rapid degradation

Active Publication Date: 2019-07-30
JIANGXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems of low LPSO structure content and too fast degradation in the magnesium alloy containing LPSO structure obtained by adding rare earth elements to magnesium a

Method used

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  • Biological magnesium alloy containing rich LPSO structures and preparing method of biological magnesium alloy
  • Biological magnesium alloy containing rich LPSO structures and preparing method of biological magnesium alloy
  • Biological magnesium alloy containing rich LPSO structures and preparing method of biological magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh 0.05g manganese powder (average particle size 5μm), 8.95g magnesium-zinc alloy powder (ZK30 powder, average particle size 50μm) and 1.0g gadolinium powder (average particle size 8μm), place the two in a ball mill, Uniformly dispersed mixed powder was obtained by ball milling under the atmosphere, the rotational speed of the ball mill was 400 rpm, and the ball milling time was 6 hours. Using the above mixed powder as raw material, the bio-magnesium alloy containing LPSO structure was prepared by laser selective melting process. During the preparation process, the laser power was controlled to 80W, the scanning speed was 300mm / min, and the spot diameter was 80μm.

[0043] The test found that fine grains and fine LPSO phases were formed in the prepared alloy, and evenly filled the entire grain interior, and no intermetallic compounds were precipitated in the alloy ( figure 1). After alloying manganese, the degradation rate of magnesium alloy decreased from 0.61mm / ye...

Embodiment 2

[0046] Weigh 0.02g manganese powder (average particle size 5μm), 8.98g magnesium-zinc alloy powder (ZK30 powder, average particle size 50μm) and 1.0g gadolinium powder (average particle size 8μm), place the two in a ball mill, Uniformly mixed mixed powder was obtained by ball milling under atmosphere, the rotational speed of the ball mill was 400 rpm, and the ball milling time was 6 hours. Using the above mixed powder as raw material, the bio-magnesium alloy containing LPSO structure was prepared by laser selective melting process. During the preparation process, the laser power was controlled to 80W, the scanning speed was 300mm / min, and the spot diameter was 80μm.

[0047] The test found that compared with the magnesium alloy without adding manganese, more LPSO structures were formed in the prepared alloy but did not fill the entire grain interior, and a small amount of intermetallic compounds were precipitated ( figure 2 ), the degradation rate of the alloy is 0.25mm / year....

Embodiment 3

[0049] Weigh 0.05g manganese powder (average particle size 5μm), 8.95g magnesium-zinc alloy powder (ZK30 powder, average particle size 50μm) and 1.0g gadolinium powder (average particle size 8μm), place the two in a ball mill, Uniformly dispersed mixed powder was obtained by ball milling under the atmosphere, the rotational speed of the ball mill was 300 rpm, and the ball milling time was 5 hours. Using the above mixed powder as raw material, a medical magnesium alloy containing LPSO structure was prepared by selective laser melting; during the preparation process, the laser power was controlled to 80W, the scanning speed was 300mm / min, and the spot diameter was 80μm.

[0050] The test found that abundant LPSO structure was formed in the prepared alloy, and its degradation rate was reduced from 0.61mm / year to 0.34mm / year compared with the magnesium alloy without adding manganese.

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Abstract

The invention discloses a biological magnesium alloy containing rich LPSO structures and a preparing method of the biological magnesium alloy. The biological magnesium alloy is obtained in the mannerthat manganese is alloyed to a magnesium alloy with the LPSO structures through an SLM technology, on one hand, the magnesium alloy stacking fault energy is reduced through the manganese element, andintermetallic compound precipitation is reduced while the number of the LPSO structures is increased; and on the other hand, the alloy supercooling degree is increased through the manganese element, grains and the LPSO structures are refined, and the magnesium alloy with the rich, fine and evenly-distributed LPSO structures is obtained. A base body is full of the formed LPSO structures in a parallel lamellar manner, a dense degraded product is formed through preferable degrading, the magnesium base body is protected, and accordingly the degrading resistance of the magnesium alloy is greatly improved.

Description

technical field [0001] The invention relates to a biological magnesium alloy rich in LPSO structure and a preparation method thereof, belonging to the technical field of biological material design and preparation. Background technique [0002] Biomagnesium alloy has good degradability, biocompatibility, bioactivity and biosafety. At the same time, it also has high specific stiffness, specific strength, density and Young's modulus similar to human bone, which can effectively reduce the stress shielding effect . Therefore, biomagnesium alloy is considered as a new type of degradable medical metal material with great development potential, which has potential advantages in the treatment of fractures and bone defects. However, as a bone implant material, magnesium alloy degrades too quickly in the human environment, causing the implant to lose its mechanical integrity before the bone tissue is fully repaired; at the same time, the magnesium alloy implant affects the implant dur...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/105C22C23/06C22C1/04A61L27/04B33Y70/00B33Y10/00
CPCB22F1/0003C22C23/06C22C1/0408A61L27/047B33Y70/00B33Y10/00B22F2998/10B22F10/00B22F10/28B22F10/36B22F10/32B22F2009/043Y02P10/25
Inventor 帅词俊高成德彭淑平杨友文帅扬
Owner JIANGXI UNIV OF SCI & TECH
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