Titanium or titanium alloy having TiO2-HA surface coating and preparation method thereof

A surface coating and titanium alloy technology, which is applied in the field of biomedical material preparation, can solve the problems of low bonding strength between the coating and the substrate, and achieve the effects of improving bonding strength, increasing deposition speed, and improving production efficiency

Inactive Publication Date: 2010-06-30
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is mainly in order to overcome the low problem of the bonding strength of the coating and the substrate existin

Method used

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  • Titanium or titanium alloy having TiO2-HA surface coating and preparation method thereof
  • Titanium or titanium alloy having TiO2-HA surface coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Soak the titanium alloy sample in a NaOH solution with a concentration of 5mol / L and a temperature of 60°C for 72 hours, then wash it with distilled water, dry it in an incubator at 40°C for 24 hours, and then raise the temperature to 600°C at a speed of 10°C / min , keep warm for 10 minutes. Then, a layer of TiO was prepared on the titanium alloy with a rotation speed of 2500r / min and a rotation time of 10s on the desktop homogenizer. 2 The coating was dried at 150°C for 15 minutes, then kept in a vacuum furnace at 500°C for 15 minutes, and then cooled in the furnace. Repeat the same steps to apply TiO 2 -HA coating and HA coating. The last heat treatment was carried out in a vacuum furnace at 750°C for 1h. Cool to room temperature and take out to obtain titanium alloy-TiO 2 -HA gradient coating medical materials. The interface bonding strength reaches 32MPa.

Embodiment 2

[0027] Soak the titanium alloy sample in a NaOH solution with a concentration of 5mol / L and a temperature of 60°C for 36 hours, then wash it with distilled water, dry it in an incubator at 40°C for 24 hours, and then raise the temperature to 500°C at a speed of 10°C / min , keep warm for 30 minutes. Then prepare a layer of TiO on the titanium alloy with a rotation speed of 2000r / min and a rotation time of 10s on the desktop homogenizer. 2 The coating was dried at 150°C for 15 minutes, then kept in a vacuum furnace at 500°C for 15 minutes, and then cooled in the furnace. Repeat the same steps to apply TiO 2 -HA coating and HA coating. The last heat treatment was carried out in a vacuum furnace at 750°C for 1h. Cool to room temperature and take out to obtain titanium alloy-TiO 2 -HA gradient coating medical materials. The interface bonding strength reaches 31MPa.

Embodiment 3

[0029] Soak the titanium alloy sample in a NaOH solution with a concentration of 8mol / L and a temperature of 60°C for 48 hours, then wash it with distilled water, dry it in an incubator at 40°C for 24 hours, and then raise the temperature to 500°C at a speed of 10°C / min , keep warm for 1 hour. Then, a layer of TiO was prepared on the titanium alloy with a rotation speed of 1500r / min and a rotation time of 10s on the desktop homogenizer. 2 The coating was dried at 150°C for 15 minutes, then kept in a vacuum furnace at 500°C for 15 minutes, and then cooled in the furnace. Repeat the same steps to apply TiO 2 -HA coating and HA coating. The last heat treatment was carried out in a vacuum furnace at 750°C for 1h. Cool to room temperature and take out to obtain titanium alloy-TiO 2 -HA gradient coating medical materials. The interface bonding strength reaches 35MPa.

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Abstract

The invention discloses titanium or a titanium alloy having a TiO2-HA surface coating and a preparation method thereof. The titanium or the titanium alloy having the TiO2-HA surface coating comprises a TiO2-HA gradient coating and a titanium substrate or a titanium alloy substrate, wherein the TiO2-HA gradient coating is coated on the titanium alloy substrate or the titanium alloy substrate and comprises an HA layer, a TiO2-HA layer and a TiO2 layer sequentially from outside to inside. The preparation method comprises the following steps of: firstly, performing alkali thermal treatment on a titanium surface or a titanium alloy surface subjected to surface pretreatment, and secondly, coating sol of titanium dioxide, compound sol of titanium dioxide and hydroxyapatite, and sol of hydroxyapatite on the titanium surface or the titanium alloy surface. Residual stress caused by the thermal mismatching between the substrate and the coating can be reduced by using the gradient coating, so that the substrate and the coating have high bonding strength; and the preparation method provided by the invention has the advantages of simple operation, easy implementation, low treatment temperature, no damage to the mechanical properties of the titanium or the titanium alloy, and low cost.

Description

technical field [0001] The invention belongs to the technical field of preparation of biomedical materials, in particular, relates to a 2 -Titanium or titanium alloy for HA (titanium dioxide-hydroxyapatite) surface coating and its preparation method. Background technique [0002] With its light weight, excellent specific strength, corrosion resistance, and good mechanical properties, titanium and its alloys have gradually occupied a dominant position in the application of dental implants, artificial joints, spinal orthopedic internal fixation systems, and orthopedic steel plates, and have become The material of choice for human hard tissue substitutes and restorations. However, titanium or titanium alloy is implanted in the body as a biologically inert material. Although it has good biocompatibility with bone, its composition is completely different from that of natural bone. There is only a mechanical embedded connection between titanium or titanium alloy and bone. Sexual...

Claims

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Application Information

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IPC IPC(8): A61L27/32A61L27/30A61L27/06A61L27/56B05C11/08B05D7/14
Inventor 何代华刘平马凤仓李伟陈小红刘新宽
Owner UNIV OF SHANGHAI FOR SCI & TECH
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