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Tantalum atom doped bioactive ceramic coating prepared on titanium alloy surface and preparation method thereof

A technology of bioactive ceramics and titanium alloys, applied in surface reaction electrolytic coating, metal material coating process, coating and other directions, can solve the problems of inability to prepare coating on sample surface, introduction of functional element Ta, and difficulty in promotion, etc. To achieve the effect of facilitating large-scale preparation, promoting proliferation and improving biocompatibility

Active Publication Date: 2019-04-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently known research methods are mostly limited to methods such as magnetron sputtering and chemical vapor deposition. These methods can indeed attach tantalum coatings on the surface of titanium alloys well, but there are obvious shortcomings: 1. Due to equipment limitations, only Small samples can be produced, but coatings cannot be prepared on the surface of large and complex samples; 2. The cost of equipment is relatively expensive, and it is difficult to achieve promotion
At present, there is no report on the introduction of functional element Ta into the surface of titanium alloy by this method and its use as a medical implant material.

Method used

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  • Tantalum atom doped bioactive ceramic coating prepared on titanium alloy surface and preparation method thereof
  • Tantalum atom doped bioactive ceramic coating prepared on titanium alloy surface and preparation method thereof
  • Tantalum atom doped bioactive ceramic coating prepared on titanium alloy surface and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Under the condition of stirring, slowly add 4.5g of tantalum pentachloride into 100mL of ethanol, and continue to stir for 0.5 hours. Then, 2.0 mL of acetylacetone and 3.0 mL of concentrated nitric acid aqueous solution (65% by mass) were added to the above solution, and the stirring was continued for 0.5 hours. Then 3 mL of hydrogen peroxide aqueous solution (30% by mass) was added dropwise, and after stirring for 1 hour, the resulting solution was sealed and aged at 5° C. for 5 days.

[0037]Add 1.7 mL of concentrated phosphoric acid aqueous solution (mass fraction 85%) and 0.3 mL of hydrofluoric acid aqueous solution (mass fraction 40%) into 50 mL of water. The titanium sheet was etched in the solution for 10 minutes, then the titanium sheet was taken out, washed with distilled water and blown dry with nitrogen. Place the corroded titanium sheet in the aged tantalum sol for 3 minutes, then slowly take out the titanium sheet, dry it at room temperature and place it i...

Embodiment 2

[0040] Add 4.5g of diamine hydrogen phosphate and 40g of calcium acetate into 1.0L of deionized water to prepare a micro-arc oxidation electrolyte, and then immerse the titanium sheet coated with tantalum sol in it. The reaction process uses a positive pulse voltage of 380V, a negative voltage of 80V, a frequency of 200HZ, a duty cycle of 15%, and a working time of 2 minutes, and the temperature of the electrolyte is controlled at 20°C. The rest of the operations are the same as in Example 1; Ultrasonic cleaning with distilled water and drying with nitrogen gas to prepare a bioactive ceramic coating doped with tantalum atoms on the surface of the titanium alloy.

Embodiment 3

[0042] While stirring, slowly add 2.0 g of tantalum ethoxide into 50 mL of ethanol solvent, and continue stirring for 0.5 hours. Then, 1.0 mL of acetylacetone and 1.0 mL of concentrated nitric acid aqueous solution (65% by mass) were added to the above solution, and the stirring was continued for 0.5 hours. Then an aqueous hydrogen peroxide solution (30% by mass) was added dropwise, and after stirring for 1 hour, the resulting solution was sealed and aged at 0° C. for 3 days.

[0043] Add 3.0 mL of concentrated phosphoric acid aqueous solution (mass fraction 85%) and 0.4 mL of hydrofluoric acid aqueous solution (mass fraction 40%) into 50 mL of water. The titanium sheet was etched in the solution for 10 minutes, then the titanium sheet was taken out, washed with distilled water and blown dry with nitrogen. Place the corroded titanium sheet in the aged tantalum sol for 4 minutes, then slowly take out the titanium sheet, dry it at room temperature and place it in an oven at 150...

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Abstract

The invention provides a tantalum atom doped bioactive ceramic coating prepared on a titanium alloy surface and a preparation method thereof, and belongs to the technical field of surface modificationof metal materials. The invention provides a method for preparing a functional element tantalum (Ta) doped bioactive ceramic coating on the surface of a medical titanium alloy by a sol-gel-micro-arcoxidation method. The method is characterized in that tantalum oxide containing sol is dipped to uniformly coat the surface of the titanium alloy by a sol-gel method, and then the high spark dischargeeffect of micro-arc oxidation is utilized to further improve so as to form a dense ceramic film on the sol-gel layer on the surface, and thus the coating is prevented from separating. The Ta-containing coating prepared by the method is uniformly distributed on the surface of the titanium alloy, so that the adhesion and multiplication of osteoblast can be improved, and as a result, the bioactivityof the titanium alloy can be improved; and the method has a good application prospect in the field of medical implant materials

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal materials, and in particular relates to a bioactive ceramic coating doped with tantalum atoms prepared on the surface of a titanium alloy by using sol-gel and micro-arc oxidation methods and a preparation method thereof, thereby improving the performance of the titanium alloy. Biological activity, showing good application prospects in the field of medical implant materials. Background technique [0002] Titanium and titanium alloys have better comprehensive mechanical properties and better biocompatibility, and have become human hard tissue replacement materials and restorations such as dental implants, bone trauma products, and artificial joints. However, since human tissue is a complex physiological medium, medical metal materials will corrode and dissolve in the body, and the precipitated metal atoms, such as vanadium, have a toxic effect on human tissue and seriously affe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12C25D11/26
CPCC23C18/1216C23C18/1241C23C18/1254C25D11/026C25D11/26
Inventor 李冬冬顾龙刘欢庞昊鹏叶鑫勇
Owner JILIN UNIV
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