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Method for modifying surfaces of biodegradable magnesium and magnesium alloy through titanium ion implantation and deposition

A biodegradation and ion implantation technology is applied in the field of surface modification of biodegradable magnesium and magnesium alloys by titanium ion implantation and deposition, which can solve the problems of limiting the thickness of the modified layer, accelerating corrosion, etc. The effect of improving and reducing self-corrosion current

Inactive Publication Date: 2015-09-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the technical characteristics of the modified magnesium alloy by metal ion implantation limit the thickness of the modified layer, and the outermost surface is usually a mixture of metal titanium and metal magnesium, which will form a galvanic couple in the corrosive medium. accelerated corrosion

Method used

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  • Method for modifying surfaces of biodegradable magnesium and magnesium alloy through titanium ion implantation and deposition
  • Method for modifying surfaces of biodegradable magnesium and magnesium alloy through titanium ion implantation and deposition
  • Method for modifying surfaces of biodegradable magnesium and magnesium alloy through titanium ion implantation and deposition

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Experimental program
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Effect test

Embodiment 1

[0032] The first step: substrate pretreatment:

[0033] After the ZK60 magnesium alloy substrate was mechanically polished, it was ultrasonically cleaned with acetone and absolute ethanol for 10 minutes to prepare the substrate sample;

[0034] The second step: ion implantation to prepare mixed oxide transition layer:

[0035] The substrate obtained in the first step is doped with titanium element to obtain a sample with a mixed oxide transition layer; the ion implantation deposition composite coating machine selects commercial pure titanium as the target material, and the parameters required for doping titanium element : Vacuum degree 5×10 -3 Pa, titanium ion implantation dose 5×10 16 ions / cm 2 , voltage energy 10keV, current 3mA;

[0036] The third step: Ion beam enhanced deposition technology to prepare the surface titanium film:

[0037] The substrate obtained in the second step is subjected to titanium thin film deposition, the target material is commercially pure ti...

Embodiment 2

[0046] The first step: substrate pretreatment:

[0047] After the matrix of bioactive magnesium alloy Mg-X (X=any one of Zn, Zr, Sr, and Ca) is mechanically polished, it is ultrasonically cleaned with acetone and absolute ethanol for 10 minutes to prepare the matrix sample;

[0048] The second step: ion implantation to prepare mixed oxide transition layer:

[0049] The substrate obtained in the first step is doped with titanium element to obtain a sample with a mixed oxide transition layer; the ion implantation deposition composite coating machine selects commercial pure titanium as the target material, and the parameters required for doping titanium element : Vacuum degree 5×10 -3 Pa, titanium ion implantation dose 1×10 17 ions / cm 2 , voltage energy 12keV, current 3mA;

[0050] The third step: Ion beam enhanced deposition technology to prepare the surface titanium film:

[0051] The substrate obtained in the second step is subjected to titanium thin film deposition, the ...

Embodiment 3

[0054] The first step: substrate pretreatment:

[0055] After the pure magnesium matrix was mechanically polished, it was ultrasonically cleaned with acetone and absolute ethanol for 10 minutes to prepare the matrix sample;

[0056] The second step: ion implantation to prepare mixed oxide transition layer:

[0057] The substrate obtained in the first step is doped with titanium element to obtain a sample with a mixed oxide transition layer; the ion implantation deposition composite coating machine selects commercial pure titanium as the target material, and the parameters required for doping titanium element : Vacuum degree 1×10 -3 Pa, titanium ion implantation dose 8×10 16 ions / cm 2 , voltage energy 10keV, current 2.5mA;

[0058] The third step: Ion beam enhanced deposition technology to prepare the surface titanium film:

[0059] The substrate obtained in the second step is subjected to titanium thin film deposition, the target material is commercially pure titanium, an...

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Abstract

The invention discloses a method for modifying surfaces of biodegradable magnesium and magnesium alloy through titanium ion implantation and deposition, and belongs to the technical field of surface treatment. The method is that mixed oxide transition layers are formed on the magnesium and magnesium alloy surfaces by the ion implantation method, wherein the transition layer is composed of titanium oxide and magnesium oxide and is 3 to 6 microns in thickness; then 2-4 microns titanium films are prepared on the transition layers by the ion beam reinforcing depositing technology. According to the method, the transition layers are prepared to ensure the high combination strength of the titanium depositing film layer and a matrix; the titanium deposition film and the transition layers can improve the corrosion resistance of the magnesium and the magnesium alloy.

Description

technical field [0001] The invention belongs to a surface modification technology of biodegradable magnesium and magnesium alloy Mg-X (X=one or more than two kinds of biocompatibility elements such as Zn, Ca, Sr, Zr). Titanium ions are implanted into the shallow surface of the magnesium alloy to form a transition layer, and then the titanium element is deposited on the transition layer by using an ion beam enhanced deposition method, and finally a titanium metal film with a transition layer is prepared on the surface of the magnesium alloy. Background technique [0002] At present, metal materials widely used in medical clinics mainly include 316L stainless steel, NiTi alloy and cobalt-chromium alloy, etc., which are used to manufacture orthopedic fixtures (such as bone nails, bone plates, etc.) and cardiovascular and cerebrovascular stents. These materials have excellent corrosion resistance and can remain stable for a long time in the physiological environment in vivo. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/48C23C14/06
Inventor 李岩郑洋
Owner BEIHANG UNIV
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