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Method for preparing controlled degradation metal composite coating on surface of medical magnesium alloy

A metal composite and magnesium alloy technology, applied in metal material coating process, device for coating liquid on the surface, coating, etc., can solve problems such as controllable degradation of magnesium alloy, singleness, and decline in material biological activity. Achieve good biological activity and cell affinity, tight binding, precise and controllable degradation rate

Inactive Publication Date: 2014-12-03
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The literature (CN1250820A) discloses the method of coating titanium on the surface of magnesium alloys to improve the corrosion resistance of magnesium alloy materials, but titanium is an inert material, which leads to a decrease in the biological activity of the material and does not involve the controllable degradation of magnesium alloys. Because titanium is non-degradable in the human body, and it is a single coating; the document (CN102341527A) discloses a method for forming a multi-layer coating on the surface of a substrate, and the coating has at least one ceramic material layer and at least one metallic material, especially at least one of the materials used is a shape memory alloy, the main purpose of which is to use the deformation of the coating to achieve the recovery of the deformation of the substrate

Method used

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  • Method for preparing controlled degradation metal composite coating on surface of medical magnesium alloy
  • Method for preparing controlled degradation metal composite coating on surface of medical magnesium alloy

Examples

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Effect test

Embodiment 1

[0025] Example 1: Prepare Mg / Fe controllable degradable metal composite coating on the surface of pure magnesium (Mg99.95) according to the following steps

[0026] Step 1: Degrease, sandpaper and mechanically polish the surface of pure magnesium, wash it with acetone and absolute ethanol, and dry it for use;

[0027] Step 2: Carry out the film growth of the Mg / Fe metal composite coating on the physical vapor deposition equipment; the thickness of the Mg / Fe metal composite coating is 100 nm, the number of cycles is 20, and the modulation ratio is 1:10; The side of the Mg / Fe metal composite coating close to the substrate is a Mg layer, and then an Fe layer.

Embodiment 2

[0028] Example 2: Prepare Mg / Fe controllable degradation metal composite coating on the surface of Mg-Al-Zn alloy (AZ31 magnesium alloy) according to the following steps

[0029] Step 1: Degrease, sandpaper and mechanically polish the surface of the AZ31 magnesium alloy, wash it with acetone and absolute ethanol, and dry it for use;

[0030] Second step: utilize the chemical vapor deposition method to carry out the coating growth of Mg / Fe metal composite coating on magnesium alloy; The thickness of described Mg / Fe metal composite coating is 1000 nm, and cycle number is 10, and modulation ratio is 1: 2; The side of the Mg / Fe metal composite coating close to the substrate is a Mg layer, and then an Fe layer.

Embodiment 3

[0031] Example 3: Prepare Mg / Fe controllable degradation metal composite coating on the surface of Mg-Al-Zn alloy (AZ61 magnesium alloy) according to the following steps

[0032] Step 1: Degrease, sandpaper and mechanically polish the surface of the AZ61 magnesium alloy, wash it with acetone and absolute ethanol, and dry it for use;

[0033] Second step: carry out the preparation of Mg / Fe metal composite coating on cold spray equipment; The thickness of described Mg / Fe metal composite coating is 1000 μ m, and cycle number is 2, and modulation ratio is 10:1 (1: 0.1); the Mg / Fe metal composite coating is a Mg layer on one side of the substrate, and then an Fe layer.

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Abstract

The invention discloses a method for preparing a controlled degradation metal composite coating on the surface of a medical magnesium alloy. The method comprises the following steps: deoiling, grinding and polishing the surface of the magnesium alloy, and depositing a magnesium (Mg) / iron (Fe) periodic composite multilayer film on the surface of the magnesium alloy material through physical vapor deposition, chemical vapor deposition, cold spraying or plasma spraying, wherein the periodicity of magnesium and iron is 2-20, a thickness ratio (blending ratio) of magnesium to iron is 1:(0.1-10), and the total thickness of the coating is 100nm-1000mu m. According to the metal composite coating, the corrosion rate of a magnesium alloy base material can be effectively relieved, good relevance is formed between the corrosion and degradation speed of the magnesium alloy and the periodicity, blending ratio and total thickness of the coating; the composite coating has the characteristics of high biological activity and controllable degradation speed, and the problem that the magnesium alloy is extremely short in implant time in a human body is solved.

Description

technical field [0001] The invention relates to the field of biomedical metal implant materials or intervention technology, in particular to a method for preparing a controllable degradable metal composite coating on the surface of a medical magnesium alloy. Background technique [0002] Compared with the clinically used implant materials, magnesium alloy has many outstanding advantages. Magnesium alloy has higher specific strength and specific stiffness, its density is basically equivalent to that of human bone, and its elastic modulus is about 45 GPa, which is closer to that of human bone. . Magnesium is the fourth largest mineral element after calcium, sodium and potassium in the human body, and it is also one of the elements necessary to participate in the metabolism of the human body. In recent years, magnesium and magnesium alloys have been paid more and more attention as metal implant materials. However, the results of in vitro simulation experiments and animal expe...

Claims

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Application Information

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IPC IPC(8): C23C30/00C23C14/16C23C16/06C23C4/08B05D7/14C23C4/134
Inventor 丁红燕周广宏夏木建章跃潘长江刘爱辉朱庆灵
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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