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Method for low-temperature copperizing of surface of titanium or titanium alloy

A titanium alloy and copper infiltration technology, which is applied in the fields of medical formula, superimposed layer plating, metal material coating process, etc., can solve the problem that titanium or titanium alloy implants are easy to cause bacterial infection, high temperature of copper infiltration, and long time consumption To achieve good antibacterial performance and biocompatibility, reduce the temperature of copper infiltration, and increase the thickness of copper infiltration

Active Publication Date: 2020-10-02
EAST CHINA JIAOTONG UNIVERSITY
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is that titanium or titanium alloy implants are easy to cause bacterial infection, and the conventional copper infiltration technology has problems such as high copper infiltration temperature, long time consumption, and thin infiltration layer. Method for deep copper infiltration layer with mechanical properties, corrosion resistance, antibacterial properties and biocompatibility

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  • Method for low-temperature copperizing of surface of titanium or titanium alloy
  • Method for low-temperature copperizing of surface of titanium or titanium alloy

Examples

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Embodiment 1

[0030] For the low-temperature copper infiltration treatment on the surface of TA2 titanium rod, the steps are as follows:

[0031] Step 1) will The TA2 titanium rod is fixed on the lathe, and the WC-Co cemented carbide ball (generally 6-12mm in diameter) of the ultrasonic rolling tool is in contact with the surface of the TA2 titanium rod workpiece and pressed into a certain depth. The depth is 20μm, the processing pass is 10, the amplitude of ultrasonic rolling processing is 10μm, and the output frequency is 30kHz. During the ultrasonic rolling process, liquid nitrogen is used for cooling to realize surface ultrasonic rolling under ultra-low temperature conditions. Ultra-low temperature surface ultrasonic After the rolling treatment, the surface of the TA2 titanium rod workpiece is plastically deformed, thereby forming a gradient nanostructure layer, and its cross-section is as follows: figure 1 As shown, the gradient nanostructure layer is composed of equiaxed nanocrystal...

Embodiment 2

[0037] For the low-temperature copper infiltration treatment on the surface of TC4 titanium alloy plate, the steps are as follows:

[0038] Step 1) Fix the TC4 titanium alloy plate of 100×100×5mm on the milling machine, the WC-Co cemented carbide ball of the ultrasonic rolling processing tool is pressed into the depth of 40 μm per pass, and the processing pass is 10. The processing amplitude is 10 μm, the output frequency is 30 kHz, and liquid nitrogen is used for cooling during the ultrasonic rolling process.

[0039] Step 2) Use organic solvent acetone to carry out ultrasonic cleaning and degreasing treatment to the parts obtained in step 1); then soak in 40% HNO 3 and 3% HF solution for 2s, washed with water and dried;

[0040] Step 3) Carry out copper plating to the TC4 titanium alloy processed through step 2), adopt CuSO 4 90g / L, pH=1 electrolyte, current density 30mA / cm 2 , the bath temperature is 30°C, and the electroplating time is 5 hours.

[0041] Step 4) Carry ...

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Abstract

The invention relates to a method for low-temperature copperizing of the surface of titanium or a titanium alloy. The method comprises the steps that surface ultrasonic rolling treatment is conductedon a titanium or titanium alloy workpiece under the condition of ultralow temperature to enable the surface of the titanium or titanium alloy workpiece to plastically deform and sequentially form a gradient nano-structure layer including equiaxial nano-crystals, lamellar nano-crystals and macro-crystals from the most superficial layer to a core part; the workpiece subjected to ultrasonic rolling treatment is subjected to degreasing, oil removal and acid cleaning activation treatment; then the workpiece is plated with copper, cleaned and blow-dried; and finally the treated workpiece is placed into a vacuum annealing furnace to be subjected to copperizing treatment and then taken out for air cooling, a copper-plated layer is stripped, and cleaning and blow drying are carried out. According to the method, the copperizing temperature of the surface of the titanium or titanium alloy can be greatly decreased, the copperizing time is shortened, the copperizing thickness is increased, qualitycontrollability of an obtained copperized layer is strong, the copperized layer is uniform, flat and good in finish degree and has the good antibacterial property and biocompatibility, and the methodcan meet the clinical demand for human body hard tissue implants.

Description

technical field [0001] The invention relates to a method for low-temperature copper penetration on the surface of titanium or titanium alloy. Background technique [0002] Due to its high specific strength, low elastic modulus, good corrosion resistance and biocompatibility, titanium or titanium alloy alloys gradually occupy a dominant position in the application of dental implants, artificial bones, artificial joints, etc. The material of choice for hard tissue substitutes and restorations. However, titanium or titanium alloys are biologically inert materials, which can easily cause bacterial infection and induce inflammation after implantation in the human body. This kind of infection will recur, is difficult to control, and conventional antibiotic therapy is difficult to be effective, and it has been a thorny problem that has plagued medical staff for a long time. Therefore, on the premise of ensuring its mechanical properties and corrosion resistance, how to make tradi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/02A61L27/06A61L27/50C23C10/36C25D3/38
CPCC23C28/023C23C10/36C25D3/38A61L27/06A61L27/50A61L2400/18
Inventor 胡剑邱靖万怡灶刘琴彭梦霞甘德强王捷李永祥
Owner EAST CHINA JIAOTONG UNIVERSITY
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