Method for carrying out surface modification upon biodegradable magnesium and magnesium alloy through iron ion implantation deposition

A biodegradation and ion implantation technology is applied in the field of surface modification of biodegradable magnesium and magnesium alloys by iron ion implantation and deposition. Mechanical properties, improved biocompatibility, and improved corrosion resistance

Active Publication Date: 2014-01-08
DONGGUAN MEIANMEIYE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the technical characteristics of the magnetron sputtering method itself determine that there is a clear interface between the prepared iron film and the magnesium and magnesium alloy substrates. This interface is a typical mechanical bonding with poor bonding force.
The iron film is prone to local peeling under the action of external force, which accelerates the corrosion of the magnesium substrate and further leads to the deterioration of the mechanical properties of the material.

Method used

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  • Method for carrying out surface modification upon biodegradable magnesium and magnesium alloy through iron ion implantation deposition
  • Method for carrying out surface modification upon biodegradable magnesium and magnesium alloy through iron ion implantation deposition
  • Method for carrying out surface modification upon biodegradable magnesium and magnesium alloy through iron ion implantation deposition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The first step: substrate pretreatment:

[0040] After the biomedical pure magnesium matrix is ​​ground and polished, it is ultrasonically cleaned with acetone and absolute ethanol for 10 minutes to prepare the matrix sample;

[0041] The second step: ion implantation to prepare oxide transition layer:

[0042] (A) Put the substrate sample prepared in the first step into an ion implanter for argon ion sputtering to remove surface impurities; wherein, the vacuum degree is 0.1×10 -3 Pa, energy 5KeV, time 10min;

[0043] (B) Doping the matrix sample treated with argon ions with iron element to prepare a sample with a transition layer;

[0044] The ion implanter selects the target as an iron target, and the parameters required for doping iron elements: vacuum degree 0.1×10 -3 Pa, iron dose 1×10 16 ions / cm 2 , voltage energy 40KeV, current 1mA;

[0045] The third step: Ion beam enhanced deposition technology to prepare the surface iron thin film:

[0046] When deposit...

Embodiment 2

[0060] The first step: substrate pretreatment:

[0061] The bioactive magnesium alloy Mg-X (X=any one of Zn, Zr, Sr, Ca) matrix is ​​ground and polished, and then ultrasonically cleaned with acetone and absolute ethanol for 10 minutes to prepare the matrix sample;

[0062] The second step: ion implantation to prepare oxide transition layer:

[0063] (A) Put the substrate sample prepared in the first step into an ion implanter for argon ion sputtering to remove surface impurities; wherein, the vacuum degree is 0.2×10 -3 Pa, energy 7KeV, time 10min;

[0064] (B) Doping the matrix sample treated with argon ions with iron element to prepare a sample with a transition layer;

[0065] The ion implanter selects the target as an iron target, and the parameters required for doping iron elements: vacuum degree 1.5×10 -3 Pa, dose of iron element 5×10 16 ions / cm 2 , voltage energy 65KeV, current 2mA;

[0066] The third step: Ion beam enhanced deposition technology to prepare the sur...

Embodiment 3

[0072] The first step: substrate pretreatment:

[0073] After the commercialized ZK60 and ZK61 magnesium alloy substrates were ground and polished, they were ultrasonically cleaned with acetone and absolute ethanol for 10 minutes to obtain substrate samples;

[0074] The second step: ion implantation to prepare oxide transition layer:

[0075] (A) Put the substrate sample prepared in the first step into an ion implanter for argon ion sputtering to remove surface impurities; wherein, the vacuum degree is 0.25×10 -3 Pa, energy 8KeV, time 20min;

[0076] (B) Doping the matrix sample treated with argon ions with iron element to prepare a sample with a transition layer;

[0077] The ion implanter selects the target as an iron target, and the parameters required for doping iron elements: vacuum degree 1.5×10 -3 Pa, iron dose 1×10 17 ions / cm 2 , voltage energy 75KeV, current 2.5mA;

[0078] The third step: Ion beam enhanced deposition technology to prepare the surface iron thin...

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Abstract

The invention discloses a method for carrying our surface modification upon biodegradable magnesium and magnesium alloy through iron ion implantation deposition. The method belongs to the technical field of surface treatment. According to the invention, through ion implantation, a composite transition layer doped with iron ions is formed on the surface of magnesium and magnesium alloy. The transition layer is composed of Fe2O3 and MgO, and has a thickness of 20-50nm. An iron film with a thickness of 100-500nm is prepared on the transition layer with an ion-beam-assisted enhanced deposition technology. The transition layer preparation method provided by the invention assists in ensuring good bonding strength between the deposited iron film and the substrate. With the method provided by the invention, corrosion resistance, biocompatibility, and mechanical properties of magnesium and magnesium alloy are improved.

Description

technical field [0001] The invention belongs to a surface treatment technology for biodegradable magnesium and magnesium alloy Mg-X (X=one or more than two kinds of biocompatible elements such as Zn, Ca, Sr and Zr). After the alloy surface is implanted with iron ions to form a transition layer, the iron element is deposited on the transition layer by ion beam enhancement, and the deposited sample is subjected to heat treatment, and finally an iron film with a transition layer is formed on the surface of magnesium and magnesium alloy. Background technique [0002] At present, the orthopedic fixtures and cardiovascular implant materials used in clinical medicine mainly include 316L stainless steel, NiTi alloy and cobalt-chromium alloy, etc., which are all inert materials and cannot be degraded in the body fluid environment. The long-term existence of these implants at the implantation site may cause tissue inflammation and blood vessel restenosis, etc., so a second operation i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/48C23C14/34C23C14/08C23C14/18C23C14/58
Inventor 李岩郑洋
Owner DONGGUAN MEIANMEIYE TECH CO LTD
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