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Surface treatment method for improving bioactivity of medical beta-type titanium alloy surface

A technology of biological activity and surface treatment, applied in surface reaction electrolytic coating, medical science, electrolytic coating, etc., can solve problems such as no systematic research, achieve the effect of simple method, improve biological activity, and improve anti-wear ability

Inactive Publication Date: 2012-09-26
WEIGAO HLDG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most researches are dedicated to the preparation of nanotubes on the surface of pure titanium and titanium alloys containing a small amount of other elements such as Al and V. For β-type medical titanium alloys rich in Nb, Zr, Sn and other elements, the surface nanotube film There is no systematic research on the growth process and growth morphology control of layers.

Method used

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  • Surface treatment method for improving bioactivity of medical beta-type titanium alloy surface
  • Surface treatment method for improving bioactivity of medical beta-type titanium alloy surface
  • Surface treatment method for improving bioactivity of medical beta-type titanium alloy surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] After the Ti-24Nb-4Zr-8Sn sample with a diameter of 10 mm and a thickness of 1 mm was polished step by step with 800# and 1200# SiC sandpaper on a pre-grinder, it was ultrasonically cleaned with acetone, absolute ethanol and deionized water for ten minutes each , blow dry in air.

[0045] The process of the described oxidation treatment method is as follows: the anodic oxidation method, the aqueous electrolyte solution is 1 mol / liter NH 4 NO 3 , 0.15 mol / L NH 4 HF 2 , The pH value of the solution is about 6-7.

[0046] At room temperature, the titanium-niobium-zirconium-tin alloy (Ti-24Nb-4Zr-8Sn) was used as the anode, and the stainless steel container was used as the cathode, and the step-by-step boost method was adopted. The boost rate under different test parameters was 0.5V / s, and the oxidation time was from Start timing after boosting to the set voltage. After oxidation, rinse with deionized water.

[0047] Set the same oxidation time (1.5h), and the nanotub...

Embodiment 2

[0054] The difference from Example 1 is:

[0055] The Ti-25Nb sample with a diameter of 10 mm and a thickness of 1 mm was ground on a pre-grinder step by step with 800# and 1200# SiC sandpaper, and then ultrasonically cleaned with acetone, absolute ethanol and deionized water for ten minutes each, and blown in the air. Dry.

[0056] The process of the described oxidation treatment method is as follows: the anodic oxidation method, the aqueous electrolyte solution is 1.5 mol / liter NH 4 NO 3 , 0.15 mol / L NH 4 HF 2 , The pH value of the solution is about 6-7.

[0057] At room temperature, titanium-niobium alloy (Ti-25Nb) is used as the anode, and the stainless steel container is used as the cathode. The step-by-step voltage boost method is adopted. The voltage boost speed under different test parameters is 0.5V / s, and the oxidation time is from boost to the set voltage. Then start timing. Rinse with deionized water after oxidation. Setting the same oxidation time (1.5h), t...

Embodiment 3

[0059] The difference from Example 1 is:

[0060] After the Ti-25Zr sample with a diameter of 10mm and a thickness of 1mm was ground step by step on a pre-grinder with 800# and 1200# SiC sandpaper, it was ultrasonically cleaned with acetone, absolute ethanol and deionized water for ten minutes each, and blown in the air. Dry.

[0061] The process of the described oxidation treatment method is as follows: the anodic oxidation method, the aqueous electrolyte solution is 1.5 mol / liter NH 4 NO 3 , 0.15 mol / L NH 4 HF 2 , The pH value of the solution is about 6-7.

[0062] At room temperature, titanium-zirconium alloy (Ti-25Zr) is used as the anode, and the stainless steel container is used as the cathode. The step-by-step boost method is adopted. The boost rate under different test parameters is 0.5V / s, and the oxidation time is from boost to the set voltage. Then start timing. Rinse with deionized water after oxidation. Set the oxidation time (1.5h), and the surface and cro...

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Abstract

The invention relates to the technical field of surface treatment and especially relates to a surface treatment method for improving bioactivity of a medical beta-type titanium alloy surface. The surface treatment method is characterized in that through anodic oxidation, hydro-thermal treatment and heating treatment on a titanium alloy, a composite oxide coating is formed on the surface of the titanium alloy; an inner layer is an oxide nanotube layer; the contents and element valences of Ti, Nb and Zr oxides of the inner layer change gradually; the diameter of the inner layer is in a range of 30 to 310nm; the thickness of the inner layer is in a range of 0 to 20 microns; and an outer layer is a calcium titanate layer having the thickness of 0 to 1 microns. The surface treatment method is suitable for a beta-type medical titanium alloy rich in Nb, Zr and the like. A gradient coating prepared by the surface treatment method has an integrated crystal form, has a high bone hydroxyapatite layer formation induction capacity and a high cell absorption and proliferation capacity of the surface, and has good biocompatibility. The surface treatment method can prevent the phase change and the brittle rupture caused by high temperature spaying. An oxide layer membrane is directly formed on a matrix by chemical and electrochemical principles so that the adherence between the matrix and the oxide layer membrane is improved. Through the surface treatment method, a uniform coating layer can be formed on a matrix having a complex shape without the limit of a matrix shape.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a surface treatment method for improving the biological activity of the surface of medical β-type titanium alloy. Background technique [0002] Titanium alloys are widely used in human orthopedic surgery due to their excellent mechanical properties, low elastic modulus, corrosion resistance to body fluids, and good biocompatibility. However, titanium and titanium alloys are still biologically inert materials, and the combination with bone is a mechanical lock, and cannot form a strong chemical bond with human tissue. The biological environment is a very complex physical and chemical environment, including body fluids, organic macromolecules, enzymes, free radicals, cells and other factors in contact with it. After long-term implantation, even metal elements with good compatibility will not A certain level of ionic leaching or abrasive particle aggregation cannot be tol...

Claims

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Application Information

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IPC IPC(8): C25D11/26A61L27/06A61L27/54A61L27/28
Inventor 李述军高山王楠戴美林郝玉琳杨锐
Owner WEIGAO HLDG
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