A method for preparing titanium alloy biomimetic coating by combining laser and anodic oxidation
An anodizing and titanium alloy technology, applied in the field of bionic structure layer, can solve the problems of uncontrollable surface pore structure and process pollution, and achieve the effects of easy adjustment, accelerated element diffusion, and improved biological activity.
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Embodiment 1
[0030] (1) Preparation of samples and reagents
[0031] Take a 20×20×5mm TC4 titanium alloy and use a 500w IPG fiber laser. Under the conditions of laser power of 500W, spot diameter of 0.1mm, scanning distance of 0.06mm, and scanning speed of 1000mm / s, the alloy surface was scanned to obtain TC4 titanium alloy sample 1 after laser pretreatment.
[0032] Control sample: TC4 titanium alloy without laser pretreatment.
[0033] (2) Anodizing treatment
[0034] Put the TC4 titanium alloy sample 1 and the control sample after the laser pretreatment in step (1) into anhydrous acetone and ultrasonically clean them for 5-10 minutes, rinse them with distilled water after taking them out, put them into an alkaline degreasing solution, and set them at 60°C Soak for 20min, then wash with flowing hot water at 80°C, and then clean with flowing cold water; then put it into the anodic oxidation solution as the anode, use stainless steel as the cathode, the anode-to-cathode area ratio is 1:2...
Embodiment 2
[0038] The laser scanning speed is 1500mm / s, and the composition of the anodizing solution is: malic acid 25g / L, Na 2 SiO 3 5g / L, CaCl 2 3g / L, Na 2 HPO 4 3g / L, the solvent is deionized water. The current density of the pulsed power supply is 7A / dm 2 , the impulse frequency is 1Hz, the duty ratio is 50%, the temperature is 10°C, and the stirring speed is 100r / min, and the treatment is 60min. Others are prepared in the same way as sample 1, and the titanium alloy sample 2 with bionic coating is obtained, and the titanium alloy sample 2 is observed. Surface topography.
Embodiment 3
[0040] The laser scanning speed is 3000mm / s, and the composition of the anodizing solution is: malic acid 5g / L, Na 2 SiO 3 5g / L, CaCl 2 3g / L, Na 2 HPO 4 3g / L, the solvent is deionized water. The current density of the pulse power supply is 5A / dm 2, the impulse frequency is 1Hz, the duty ratio is 50%, the temperature is 10°C, and the stirring speed is 100r / min, and the treatment is 60min. The other operations are the same as the preparation of sample 1 to obtain the titanium alloy sample 3 with bionic coating. Observe its surface morphology.
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