Method for modifying titanium surface

A titanium metal modification technology, applied in metal material coating process, prosthesis, vacuum evaporation plating, etc., can solve the problems of ion implantation modification process difficulties, high reactivity, low melting point, etc., to improve corrosion resistance Sexuality and biological activity, good biocompatibility, good corrosion resistance and wear resistance

Inactive Publication Date: 2011-09-14
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the low melting point and high reactivity of substances such as calcium, phosp

Method used

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  • Method for modifying titanium surface
  • Method for modifying titanium surface
  • Method for modifying titanium surface

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Pretreat pure titanium in 5% oxalic acid solution at 100°C for 2 hours to remove the natural oxide layer on the surface and obtain a clean surface with uniform roughness (see figure 1 shown).

[0031] Using PIII&D technology, high-purity tantalum metal is used as the cathode, and tantalum ions are implanted on the pretreated medical titanium surface to obtain a titanium-tantalum surface alloy layer. The specific injection parameters are shown in Table 1. The surface XPS spectrum obtained under this injection parameter is shown in Figure 2a As shown, the results show the presence of tantalum element on the surface of the sample. Scanning electron microscope observation found that there was no significant difference in the surface morphology of tantalum before and after implantation. The reason may be that tantalum and titanium metal are easy to form alloys. During the implantation process, tantalum ions carry a certain amount of energy and can enter the crystal lattic...

Embodiment 2

[0036] Pure titanium was pretreated in 5% oxalic acid solution at 100°C for 2 hours to remove the natural oxide layer on the surface and obtain a clean surface with uniform roughness.

[0037] Using PIII&D technology, using high-purity tantalum metal as the cathode, tantalum ion plating is applied to the surface of pretreated medical titanium to obtain a nano-scale surface layer with tantalum and its oxides. The specific coating parameters are shown in Table 2. The surface XPS spectrum obtained under the coating parameters is shown in Figure 2b As shown, the results show that the outermost surface of the sample is tantalum and its oxides. The scanning electron microscope observation found that there was no significant difference in the surface morphology of the tantalum coating before and after coating. The reason may be that the tantalum film obtained under the experimental conditions was at the nanometer level, which was not enough to completely cover the micron protrusion...

Embodiment 3

[0042] Pure titanium was pretreated in 5% oxalic acid solution at 100°C for 2 hours to remove the natural oxide layer on the surface and obtain a clean surface with uniform roughness.

[0043] Using PIII&D technology, high-purity tantalum metal is used as the cathode, and oxygen is introduced into the vacuum chamber to coat tantalum ions on the pretreated medical titanium surface to obtain a nano-scale surface layer of tantalum oxide. The specific tantalum oxide coating parameters are shown in Table 3. Scanning electron microscope observation found that there was no significant difference in surface morphology before and after coating. The reason may be that the tantalum oxide film obtained under the experimental conditions was at the nanometer level, which was not enough to completely cover the micron protrusions on the pretreated medical titanium surface.

[0044] The potentiodynamic polarization curve of the titanium surface coated with tantalum oxide was measured in normal...

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Abstract

The invention discloses a method for modifying titanium surface. The method comprises the following step of: performing tantalum ion implantation or plating on the titanium surface by using a plasma immersion ion implantation and deposition technology to obtain a tantalum and/or tantalum oxide modified layer. The titanium surface is modified, so that a high mechanical property of titanium can be preserved, the corrosion resistance and the bioactivity of a material can be improved, and high biocompatibility of the material can be kept; and the modified titanium surface which is subjected to tantalum ion implantation or plating is not required to be subjected to any aftertreatment, bone-like apatite can be induced to form and grow on the surface when the titanium surface is soaked in simulated body fluid, and an artificial bone substitutional material with high comprehensive performance can be obtained.

Description

technical field [0001] The invention relates to a method for modifying the surface of titanium metal, in particular to a method for modifying the surface of titanium metal by plasma immersion ion implantation and deposition technology, and belongs to the technical field of surface modification of metal materials. Background technique [0002] Biomedical metal materials have been widely used in bone tissue and joint reconstruction due to their excellent mechanical properties, easy processing and stability. At present, metal materials used as implants include: 316L stainless steel, cobalt-chromium alloy, titanium and its alloys, among which titanium and its alloys are the most widely used due to their excellent mechanical properties and biocompatibility. However, metal implant materials and devices generally have clinical problems such as inactivity and poor integration with bone tissue, which may lead to implant detachment and surrounding tissue necrosis. How to make metal i...

Claims

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Application Information

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IPC IPC(8): C23C14/48C23C14/06C23C14/18A61L27/06A61L27/30A61L27/54
Inventor 刘宣勇李子卉孟凡浩
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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