HA/TiO2 layer on surface of titanium alloy and preparation method thereof

A titanium alloy and bonding strength technology, which is applied to the HA/TiO2 layer on the surface of the titanium alloy and the field of its preparation, can solve the problems of low growth efficiency of hydroxyapatite and limited thickness of the hydroxyapatite layer, and meets the requirements of medical applications , The effect of increased contact area and high bonding strength

Inactive Publication Date: 2014-07-09
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the calcium and phosphorus in the hydrothermal treatment synthesized hydroxyapatite all come from the micro-arc oxidation film layer, the source of calcium and phosphorus is very small, and the thickness of the formed hydroxyapatite layer is very limited.
Secondly, the growth efficiency of hydroxyapatite under the action of hydrothermal treatment is low, and it usually takes 5 to 10 hours to grow several microns

Method used

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  • HA/TiO2 layer on surface of titanium alloy and preparation method thereof
  • HA/TiO2 layer on surface of titanium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] HA / TiO on the surface of titanium alloy 2 Layer preparation method one:

[0020] Step 1, configure the micro-arc oxidation treatment solution: add 1g sodium silicate, 3g calcium acetate, 2g sodium dihydrogen phosphate and 2g sodium fluoride to each liter of deionized water, stir to make it evenly mixed into a solution, add sodium hydroxide, The pH value of the above solution was adjusted to 9 to obtain a micro-arc oxidation treatment solution.

[0021] Step 2, micro-arc oxidation treatment: the chemical cost of the titanium alloy substrate used in this example is Ti-6Al-4V, the titanium alloy plate is placed in the micro-arc oxidation treatment solution obtained in step 1, as an anode, and the stainless steel tank As the cathode, micro-arc oxidation was performed in a DC pulsed micro-arc oxidation device with a current density of 2A / cm 2 , the duty cycle is 10%, and the titanium alloy plate is taken out after 10 minutes of treatment, washed with deionized water and dr...

Embodiment 2

[0030] HA / TiO on the surface of titanium alloy 2 Layer preparation method two:

[0031] Step 1, configure the micro-arc oxidation treatment solution: add 1.5g sodium silicate, 4.5g calcium acetate, 3g sodium dihydrogen phosphate and 3g sodium fluoride to each liter of deionized water, mix evenly, configure a solution, and add sodium hydroxide, and adjust the pH value of the solution to 10 to obtain a micro-arc oxidation treatment solution.

[0032] Step 2, micro-arc oxidation treatment: place the titanium alloy Ti-6Al-4V plate in the above-mentioned micro-arc oxidation treatment solution as an anode, use a stainless steel tank as a cathode, and perform micro-arc oxidation in a DC pulse micro-arc oxidation equipment, using The current density is 2.5A / cm 2 , the duty cycle was 15%, and the titanium alloy plate was taken out after 7.5 min of treatment, washed with deionized water, and then dried naturally.

[0033] The appearance of the titanium alloy plate after micro-arc oxi...

Embodiment 3

[0038] HA / TiO on the surface of titanium alloy 2 Layer preparation method three:

[0039] Step 1, configure the micro-arc oxidation treatment solution: add 2g sodium silicate, 6g calcium acetate, 4g sodium dihydrogen phosphate and 4g sodium fluoride to each liter of deionized water, mix evenly, configure a solution, and add hydroxide to the solution sodium, and adjust the pH value of the solution to 11 to obtain a micro-arc oxidation treatment solution.

[0040] Step 2, micro-arc oxidation treatment: place the titanium alloy Ti-6Al-4V plate in the above-mentioned micro-arc oxidation treatment solution as an anode, use a stainless steel tank as a cathode, and perform micro-arc oxidation in a DC pulse micro-arc oxidation equipment, using The current density is 3A / cm 2 , the duty cycle is 20%, and the titanium alloy plate is taken out after 5 minutes of treatment, cleaned with deionized water, and then dried naturally.

[0041] The morphology of the micro-arc oxidation-treated...

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Abstract

The invention provides an HA/TiO2 layer on the surface of a titanium alloy. The binding strength of the HA/TiO2 layer and a titanium alloy substrate is 15-28MPa. The HA/TiO2 layer is characterized by comprising a porous TiO2 layer wrapped on the surface of the titanium alloy and an HA layer growing on the TiO2 layer. The invention further provides a method of preparing the HA/TiO2 layer on the surface of the titanium alloy. The method is characterized by comprising the following steps: S1, preparing a micro-arc oxidation treatment solution; S2, carrying out micro-arc oxidation treatment; S3, preparing an electrochemical deposition solution; S4, carrying out electrochemical deposition. The HA/TiO2 layer on the surface of the titanium alloy and the titanium alloy substrate have high binding strength which satisfies the demand on medical application. The preparation method of the HA/TiO2 layer comprises the following steps: firstly, forming a calcium and phosphorus-containing porous TiO2 layer on the surface of the titanium alloy by virtue of the micro-arc oxidation method; then, preparing the HA layer on the surface of the TiO2 layer by the electrochemical deposition method. The HA biological active coating is high in binding strength with the substrate, fast in growing speed and suitable for commercial production.

Description

technical field [0001] The invention relates to the field of surface treatment of medical titanium alloys, in particular to HA / TiO on the surface of titanium alloys 2 layers and methods of making them. Background technique [0002] Titanium alloy has become an important material of choice for human hard tissue substitutes and restorations due to its excellent comprehensive mechanical properties and process properties. However, the currently widely used titanium alloys mainly have biological activity problems. An effective way to improve the bioactivity of existing medical titanium alloys is to use surface engineering methods to modify their surface, so that the bioactivity of titanium alloys can be greatly improved, so that they are more suitable for medical applications. [0003] At present, in order to endow metal implants with bioactivity, it is common practice to prepare a layer of bioactive ceramic film on the surface of the metal. The film layer is usually composed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/32A61L27/06C25D11/26C25D9/08
Inventor 马凤仓刘平李伟刘新宽陈小红何代华杨丽红
Owner UNIV OF SHANGHAI FOR SCI & TECH
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