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Composite coating on the surface of a magnesium alloy biological implant material and its preparation method

An implant material and composite coating technology, which is applied in the field of biomedical metal implant materials, can solve problems such as difficult protective effects, and achieve the effects of controllable coating structure, excellent film-base binding force, and improved biocompatibility

Active Publication Date: 2011-12-21
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are micropores on the surface of the oxide ceramic layer produced by micro-arc oxidation, which makes it difficult to effectively protect magnesium alloy bioimplantation materials in complex physiological environments.

Method used

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  • Composite coating on the surface of a magnesium alloy biological implant material and its preparation method
  • Composite coating on the surface of a magnesium alloy biological implant material and its preparation method

Examples

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Effect test

Embodiment 1

[0031] In this embodiment, the composite coating on the surface of the magnesium alloy biological implant material is a MAO / DLC composite coating, that is, there is a transition layer between the surface of the magnesium alloy substrate and the DLC film layer, and the transition layer utilizes micro-arc oxidation technology to make An oxide porous film formed in situ by magnesium atoms on the surface of the magnesium alloy substrate, and the maximum surface pore diameter of the oxide porous film is 500nm, the thickness of the transition layer is 5μm, and the thickness of the DLC film layer is 600nm.

[0032] The preparation method of the composite coating on the surface of the above-mentioned magnesium alloy biological implant material comprises the following steps:

[0033] Step 1: The magnesium alloy substrate is mechanically polished, and chemical reagents without the introduction of harmful elements are selected to prepare a silicate-based micro-arc oxidation electrolyte su...

Embodiment 2

[0039] In this embodiment, the composite coating on the surface of the magnesium alloy biological implant material is a MAO / N-DLC composite coating, that is, between the surface of the magnesium alloy substrate and the nitrogen-doped DLC film layer (abbreviated as the N-DLC film layer). There is a transition layer, which is an oxide porous film formed in situ by magnesium atoms on the surface of the magnesium alloy substrate using micro-arc oxidation technology, and the maximum surface pore diameter of the oxide porous film is 400nm, and the thickness of the transition layer is The thickness of the N-DLC film layer is 3 μm, and the thickness is 500 nm.

[0040] The preparation method of the composite coating on the surface of the above-mentioned magnesium alloy biological implant material comprises the following steps:

[0041] Step 1: The magnesium alloy substrate is mechanically polished, and chemical reagents without the introduction of harmful elements are selected to prep...

Embodiment 3

[0047] In this embodiment, the composite coating on the surface of the magnesium alloy biological implant material is MAO / Ti-DLC composite coating, that is, between the magnesium alloy substrate surface and the titanium-doped DLC film layer (abbreviated as Ti-DLC film layer). There is a transition layer, which is an oxide porous film formed in situ by magnesium atoms on the surface of the magnesium alloy substrate using micro-arc oxidation technology, and the maximum surface pore diameter of the oxide porous film is 800nm, and the thickness of the transition layer is The thickness of the Ti-DLC film layer is 12 μm, and the thickness is 800 nm.

[0048] The preparation method of the composite coating on the surface of the above-mentioned magnesium alloy biological implant material comprises the following steps:

[0049] Step 1: The magnesium alloy substrate is mechanically polished, and chemical reagents without the introduction of harmful elements are selected to prepare a sil...

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Abstract

The invention discloses a composite coating on the surface of a magnesium alloy biological implant material. The composite coating consists of a transition layer and a diamond-like carbon (DLC) film layer, wherein the transition layer is positioned on the surface of a magnesium alloy matrix; the DLC film layer is positioned on the surface of the transition layer; the transition layer is an oxide porous film formed by magnesium atoms of the surface layer of the magnesium alloy in situ by a microarc oxidation technology; the surface aperture of the oxide porous film is less than or equal to 1,000 nm; the thickness of the transition layer is 3 to 15 mu m; and the thickness of the DLC film layer is 300 to 1,000 nm. Compared with the conventional magnesium alloy biological implant material, the composite coating has biocompatibility, corrosion resistance more excellent than that of the Ti / DLC composite coating, wear resistance and excellent film-based bonding force with the magnesium alloy matrix, can beneficially modify the surface of the magnesium alloy matrix, and promotes application of the magnesium alloy biological implant material to the organism.

Description

technical field [0001] The invention relates to the technical field of biomedical metal implant materials, in particular to a surface that has biocompatibility, has excellent film-base bonding force with a magnesium alloy substrate, and can improve the anti-corrosion and wear resistance of magnesium alloy bio-implant materials Composite coating and method for its preparation. Background technique [0002] The bone and joint system are the main load-bearing tissues of the human body, and the repair and replacement materials after wear and tear should have high mechanical strength. Magnesium alloy is used as a hard tissue implant material, and its mechanical properties better meet the requirements of orthopedic implant materials, which can effectively avoid the problem of requiring secondary surgery to remove osteoporosis; in addition, the degradation products of magnesium alloy and biological It is compatible with the body, will not have obvious negative effects on the human...

Claims

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Application Information

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IPC IPC(8): C25D11/30C23C14/35C23C28/04B32B3/24B32B9/04A61L27/30
Inventor 杨巍汪爱英柯培玲张栋代伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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