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Magnesium-zinc-germanium alloy with cathode inhibition effect and preparation method thereof

A technology of suppression effect and germanium alloy, applied in the field of magnesium-zinc-germanium alloy with cathodic suppression effect and its preparation, magnesium-zinc-germanium alloy, can solve the problems of difficulty in forming an inert oxide protective layer and low solid solubility, and achieve expansion Effects of solid solubility, inhibition of recombination, and improvement of corrosion resistance

Inactive 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

In addition, the solid solubility of alloying elements in magnesium is generally low, making it difficult to form an inert oxide protective layer on the alloy surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Adopt germanium powder and magnesium-zinc alloy powder as raw material, weigh 0.05g germanium metal powder (purity>99.9%, average particle diameter 40nm) and 9.95g magnesium powder (ZK30 powder, purity>99.9% according to the mass ratio of 0.005:0.995, The average particle size is 60 μm), placed in a ball mill, and after passing high-purity argon gas, the set speed is 200rad / min, and the ball milling time is 5h to obtain a uniformly dispersed magnesium-zinc-germanium mixed powder. Under the protection of high-purity argon with a purity of 99.999%, the laser power is 90W, the scanning speed is 300mm / min, and the solidification rate of the molten pool is controlled to be 10 4 -10 5 Under the parameters of K / s, spot diameter of 90 μm, scanning distance of 0.1 mm, and powder coating thickness of 0.1 mm, the corrosion-resistant magnesium-zinc-germanium alloy was prepared by SLM process.

[0041] Microstructure tests found that germanium refined the grain size of magnesium allo...

Embodiment 2

[0043] Using germanium powder and magnesium-zinc alloy powder as raw materials, weigh 0.1g germanium metal powder (purity>99.9%, average particle size 40nm) and 9.9g magnesium powder (ZK30 powder, purity>99.9% according to the mass ratio of 0.01:0.99, The average particle size is 60 μm), placed in a ball mill, and after passing high-purity argon gas, the set speed is 200rad / min, and the ball milling time is 5h to obtain a uniformly dispersed magnesium-zinc-germanium mixed powder. Under the protection of high-purity argon with a purity of 99.999%, the laser power is 90W, the scanning speed is 300mm / min, and the solidification rate of the molten pool is controlled to be 10 4 -10 5 Under the parameters of K / s and spot diameter of 90 μm, the scanning distance is 0.1 mm, and the powder coating thickness is 0.1 mm. The corrosion-resistant magnesium-zinc-germanium alloy is prepared by SLM process.

[0044] Microstructure tests found that germanium refined the grain size of magnesium...

Embodiment 3

[0046] Adopt germanium powder and magnesium-zinc alloy powder as raw material, weigh 0.05g germanium metal powder (purity>99.9%, average particle diameter 40nm) and 9.95g magnesium powder (ZK30 powder, purity>99.9% according to the mass ratio of 0.005:0.995, The average particle size is 60 μm), placed in a ball mill, and after passing high-purity argon gas, the set speed is 200rad / min, and the ball milling time is 5h to obtain a uniformly dispersed magnesium-zinc-germanium mixed powder. Under the protection of high-purity argon with a purity of 99.999%, the laser power is 120W, the scanning speed is 300mm / min, and the solidification rate of the molten pool is controlled to be 10 4 -10 5 Under the parameters of K / s, spot diameter of 90 μm, scanning distance of 0.1 mm, and powder coating thickness of 0.1 mm, corrosion-resistant magnesium-zinc-germanium alloy was prepared by SLM process.

[0047] The microstructure test found that germanium refines the grain size of the magnesiu...

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Abstract

The invention discloses a magnesium-zinc-germanium alloy with a cathode inhibition effect and a preparation method thereof. The magnesium-zinc-germanium alloy comprises a magnesium matrix and a magnesium-zinc-germanium second phase, the preparation method comprises the following steps that (1), the magnesium-zinc alloy and a nano-germanium powder are placed in a ball mill, and the magnesium-zinc alloy and the nano-germanium powder are subjected to ball milling under a protective atmosphere to obtain a magnesium-zinc-germanium mixed power; (2), the mixed powder is taken as a raw material, and the magnesium-zinc-germanium alloy is prepared by performing selective laser melting under a protective atmosphere. According to the magnesium-zinc-germanium alloy with a cathode inhibition effect andthe preparation method, the germanium is introduced into the magnesium-zinc alloy, and the second phase containing germanium is generated in the alloy, so that the aggregation of medium hydrogen atomsin the solution on the cathode can be inhibited, the generation rate of hydrogen is reduced by weakening the recombination of the hydrogen atoms, so that the corrosion resistance of the magnesium-zinc alloy is improved; and on the other hand, the mechanical property of the magnesium-zinc alloy is improved through solid solution strengthening, fine grain strengthening and second phase strengthening.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, and relates to a magnesium-zinc-germanium alloy, in particular to a magnesium-zinc-germanium alloy with cathodic suppression effect and a preparation method thereof. Background technique [0002] Magnesium is a potential medical implant material with excellent biocompatibility, bioabsorbability and appropriate strength, and the magnesium ions produced by its degradation are important cations in the human body, which have been proven to be effective promotes bone formation. However, the electrode potential of magnesium alloys in aqueous solution is very low, and the high sensitivity to corrosion is still the main problem limiting its application. In aqueous solutions at pH<11, the magnesium alloy surface nominally does not have a protective native oxide / surface layer, allowing it to corrode rapidly in the normal pH range. Therefore, how to improve the corrosion performance of magnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/04
CPCC22C1/0408C22C23/04
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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