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Method for preparing amorphous layer of bulk material on surface of magnesium alloy

A technology of body materials and magnesium alloys, applied in the field of biomedical metal materials, can solve the problems of galvanic corrosion, slow down the degradation rate of magnesium alloys, toxic elements, and the injection layer is not easy to degrade, so as to achieve good corrosion resistance, good biological activity and cell Excellent compatibility and corrosion resistance

Active Publication Date: 2019-01-25
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the possible risk of ion implantation on the surface of magnesium alloys is that the corrosion rate of the magnesium alloy substrate is much higher than that of the surface implanted layer, and the problem of galvanic corrosion is prone to occur, and some element implanted layers are not easy to degrade.
[0010] The commonly used magnesium alloy surface modification technology mentioned above cannot slow down the degradation rate of magnesium alloy and prevent the damage of toxic elements to the human body at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare bulk material amorphous layer on the surface of Mg-Al-Zn alloy (AZ31 magnesium alloy) according to the following steps:

[0027] Step 1: Manually grind and mechanically polish the surface of the AZ31 magnesium alloy, wash it with acetone and absolute ethanol, and dry it for use;

[0028] The second step: prepare the amorphous layer of the magnesium alloy surface body material on the laser equipment, choose argon as the protective gas, and liquid nitrogen as the cooling medium; the process parameters of laser melting are: laser power 200W, scanning speed 500mm / min , the spot size is 3mm; the thickness of the amorphous layer of the bulk material is 20nm.

Embodiment 2

[0030] Prepare bulk material amorphous layer on the surface of Mg-Al-Zn alloy (AZ61 magnesium alloy) according to the following steps:

[0031] Step 1: Manually grind and mechanically polish the surface of the AZ61 magnesium alloy. After the surface is roughened and coated with light-absorbing materials, it is cleaned with acetone and absolute ethanol, and dried for use;

[0032] The second step: prepare the amorphous layer of the magnesium alloy surface body material on the laser equipment, choose argon as the protective gas, and liquid nitrogen as the cooling medium; the process parameters of laser melting are: laser power 1000W, scanning speed 300mm / min , the spot size is 2 mm; the thickness of the amorphous layer of the bulk material is 100 μm.

Embodiment 3

[0034] In Mg-Zn-Ca alloy (Mg 70 Zn 21 Ca 9 ) Surface preparation bulk material amorphous layer:

[0035] Step 1: For Mg 70 Zn 21 Ca 9 The surface of the magnesium alloy is manually polished and mechanically polished. After the surface is roughened and coated with light-absorbing materials, it is cleaned with acetone and absolute ethanol, and dried for use;

[0036] The second step: prepare the amorphous layer of the magnesium alloy surface body material on the laser equipment, choose argon as the protective gas, and liquid nitrogen as the cooling medium; the process parameters of laser melting are: laser power 200W, scanning speed 400mm / min , the spot size is 2 mm; the thickness of the amorphous layer of the bulk material is 50 μm.

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Abstract

The invention discloses a method for preparing an amorphous layer of a bulk material on the surface of magnesium alloy. After the surface of the magnesium alloy is polished, the amorphous layer is formed on the surface of the magnesium alloy by laser modification. A coating obtained by the method has an amorphous structure, and can effectively solve the problem of excessive degradation rate of themagnesium alloy. The amorphous layer is derived from the bulk material, and can ensure that the coating is not physiologically toxic. The coating is tightly bonded to a magnesium alloy matrix, and has good biocompatibility and corrosion resistance.

Description

technical field [0001] The invention belongs to the biomedical metal material technology, in particular to a method for preparing an amorphous layer of bulk material on the surface of a magnesium alloy. Background technique [0002] Magnesium and magnesium alloys have the advantages of light weight, high specific strength, high specific stiffness, good shock resistance, and good biocompatibility. Since the density of magnesium alloy is basically the same as that of human bone, its appropriate elastic modulus (about 45GPa) can effectively alleviate the stress shielding effect, so in recent years, magnesium alloy has attracted more and more attention as a metal implant material. However, the standard electrode potential of magnesium is -2.37eV, second only to active metals such as potassium, sodium, lithium, and calcium, and has poor corrosion resistance, and the presence of the second phase or impurity elements in the magnesium alloy will cause electric potential Coupled cor...

Claims

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Application Information

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IPC IPC(8): C22F1/02C22F1/06
CPCC22F1/002C22F1/02C22F1/06
Inventor 周广宏王国庆丁红燕厉虹夏木建刘磊
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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