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Method for conducting surface modification on medical titanium nickel (TiNi) shape memory alloys through niobium (Nb) ion injection deposition

A memory alloy and ion implantation technology, applied in ion implantation plating, metal material coating process, coating, etc., can solve the problems of reduced biocompatibility, difficulty, poor local corrosion resistance, etc., and achieve improved biocompatibility Sexuality, reduced toxicity, good binding strength

Active Publication Date: 2012-12-19
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be pointed out that the thickness of the titanium oxide film is only 5-10 nanometers, and it is not uniform, and the local corrosion resistance is poor, and it cannot completely prevent the dissolution of Ni ions in the matrix, which reduces the biocompatibility of the material.
And it is easy to wear it when the tissue moves in the body, resulting in direct contact between the TiNi matrix and the human tissue.
Scratch tests show that regeneration of this titanium oxide film is very slow and difficult

Method used

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  • Method for conducting surface modification on medical titanium nickel (TiNi) shape memory alloys through niobium (Nb) ion injection deposition
  • Method for conducting surface modification on medical titanium nickel (TiNi) shape memory alloys through niobium (Nb) ion injection deposition

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The first step: pretreatment of the substrate:

[0041] Select the TiNi shape memory alloy matrix with equal atomic ratio, after grinding and polishing, ultrasonic cleaning with absolute ethanol, acetone and deionized water for 10 minutes to prepare the sample;

[0042] Step 2: Preparation of oxide transition layer by ion implantation:

[0043] (A) Put the sample prepared in the first step into a metal vapor vacuum arc ion source ion implanter for argon ion sputtering to remove surface impurities; where the vacuum degree is 0.3×10 -3 Pa, voltage energy 5KeV, time 15min;

[0044] (B) The sample treated with argon ion is doped with Nb element to prepare a sample with a transition layer; the required parameters for doping with Nb element: vacuum 0.1×10 -3 Pa, niobium Nb element dose 1.0×10 17 ion / cm 2 , Energy 50KeV, current 1.5mA;

[0045] The third step: ion beam enhanced deposition technology to prepare the surface layer of Nb film:

[0046] When depositing film, the ion source an...

Embodiment 2

[0061] The first step: pretreatment of the substrate:

[0062] Select the TiNi shape memory alloy matrix with equal atomic ratio, after grinding and polishing, ultrasonic cleaning with absolute ethanol, acetone and deionized water for 10 minutes to prepare the sample;

[0063] Step 2: Preparation of oxide transition layer by ion implantation:

[0064] (A) Put the sample prepared in the first step into a metal vapor vacuum arc ion source ion implanter for argon ion sputtering to remove surface impurities; where the vacuum degree is 0.1×10 -3 Pa, energy 5KeV, time 15min;

[0065] (B) The sample treated with argon ion is doped with Nb element to prepare a sample with a transition layer; the required parameters for doping with Nb element: vacuum degree 2×10 -3 Pa, niobium Nb element dose 1.0×10 17 ion / cm 2 , Energy 80KeV, current 2mA;

[0066] The third step: ion beam enhanced deposition technology to prepare the surface layer of Nb film:

[0067] When depositing film, the ion source and spu...

Embodiment 3

[0072] The first step: pretreatment of the substrate:

[0073] Select the TiNi shape memory alloy matrix with equal atomic ratio, after grinding and polishing, ultrasonic cleaning with absolute ethanol, acetone and deionized water for 8-10 minutes to prepare samples;

[0074] Step 2: Preparation of oxide transition layer by ion implantation:

[0075] (A) Put the sample prepared in the first step into a metal vapor vacuum arc ion source ion implanter for argon ion sputtering to remove surface impurities; where the vacuum degree is 0.1×10 -3 Pa, energy 5KeV, time 30min;

[0076] (B) The sample treated with argon ion is doped with Nb element to obtain a sample with a transition layer; the required parameters for doping with Nb element: vacuum degree 1×10 -3 Pa, niobium, Nb element dose 1.5×10 17 ion / cm 2 , Energy 100KeV, current 4mA;

[0077] The third step: ion beam enhanced deposition technology to prepare the surface layer of Nb film:

[0078] When depositing film, the ion source and spu...

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Abstract

The invention discloses a method for conducting surface modification on medical titanium nickel (TiNi) shape memory alloys through niobium (Nb) ion injection deposition. The method compounds two methods of ion injection and ion beam strengthening deposition, wherein a transition layer formed by an ion injection method is mainly composed of TiO2 and Nb2O5, and an ion beam strengthening deposition method is that a pure Nb metal film layer is formed on the basis of the transition layer. After the surface modification is carried out on the alloys through the method of selecting appropriate parameters, the obtained shape memory alloys can completely prevent Ni ions from dissolving out from a matrix, and simultaneously the method has good shape memory effects which are not second to the matrix and stain resistance and biocompatibility superior to the matrix.

Description

Technical field [0001] The present invention relates to a surface treatment technology of a medical TiNi shape memory alloy, and more particularly, to a surface treatment method of a medical TiNi shape memory alloy. After the ion implantation method is used to inject Nb ions to form a transition layer, the Nb ion pair The obtained material undergoes ion beam enhanced deposition to form a Nb metal thin film technology. Background technique [0002] Biomedical materials have developed rapidly in recent years, and human implant materials are constantly being updated. Among them, the shape memory alloy with near-equal atomic ratio TiNi has special application value in the field of biomedicine due to its shape memory effect and superelasticity. At the same time, TiNi alloy has good biocompatibility and corrosion resistance, which makes it a research hotspot in the field of implants. It has been widely and practically used in various official cavity brackets and orthodontic wires. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/48C23C14/08C23C14/34C23C14/16
Inventor 李岩孙怡冉赵婷婷徐惠彬
Owner BEIHANG UNIV
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