A method for preparing a carbon nanotube reinforced composite ceramic layer on the surface of a titanium-nickel alloy
A technology of carbon nanotubes and enhanced compounding, which is applied in the direction of plating of superimposed layers, metal material coating process, coating, etc., can solve the problems of insufficient hardness of titanium dioxide layer, poor coordinated deformation ability, large internal stress, etc., and achieve improvement Abrasion resistance and biocompatibility, low cost, and improved hardness
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Embodiment 1
[0014] Step 1. Using graphite as the source electrode, the surface of the titanium-nickel base material is carburized by double-layer glow plasma metallization technology to obtain a titanium carbide modified layer.
[0015] Clean the surface of the workpiece: grind the titanium-nickel alloy with a nickel atomic percentage of 50.8% to 2000# step by step with water sandpaper, then polish it, and then ultrasonically clean it with deionized water, acetone and absolute ethanol for 15 to 30 minutes. Airtight and dry at room temperature.
[0016] Furnace loading: Put the treated titanium-nickel alloy into a double-layer glow plasma metal infiltration furnace, use graphite as the source target material, the electrode spacing is 18-19mm, and the sputtering gas is high-purity argon.
[0017] Vacuuming and pre-sputtering: Turn on the mechanical pump, evacuate to below 5Pa, pass in argon gas, the pressure is 35Pa; turn on the cathode power supply, the cathode voltage is 500V, pre-sputter...
Embodiment 2
[0028] Step 1 and Step 2 of this embodiment are exactly the same as Embodiment 1.
[0029] Step 3. Using the titanium carbide / titanium gradient modified layer obtained in step 2 as an anode, a carbon nanotube-reinforced composite ceramic layer is prepared in a micro-arc oxidation electrolyte containing carbon nanotubes by using a micro-arc oxidation technique.
[0030] The purification method of multi-walled carbon nanotubes is as follows: place carbon nanotubes in a mixed acid with a volume ratio of sulfuric acid and nitric acid of 3:1, heat at 100°C for 2 hours, filter and rinse with ionized water to make the pH to neutral, and bake Dry.
[0031] Preparation method of multi-walled carbon nanotube dispersant: the dispersant is composed of cetyltrimethylammonium bromide solution in an aqueous solution of ethylene glycol with a volume ratio of 1:1, and the content of cetyltrimethylammonium bromide 1 g / L.
[0032] At room temperature, immerse the purified multi-walled carbon n...
Embodiment 3
[0034]Step 3. Using the titanium carbide / titanium gradient modified layer obtained in step 2 as an anode, a carbon nanotube-reinforced composite ceramic layer is prepared in a micro-arc oxidation electrolyte containing carbon nanotubes by using a micro-arc oxidation technique.
[0035] The purification method of multi-walled carbon nanotubes is as follows: place carbon nanotubes in a mixed acid with a volume ratio of sulfuric acid and nitric acid of 3:1, heat at 100°C for 2 hours, filter and rinse with ionized water to make the pH to neutral, and bake Dry.
[0036] Preparation method of multi-walled carbon nanotube dispersant: the dispersant is composed of cetyltrimethylammonium bromide solution in an aqueous solution of ethylene glycol with a volume ratio of 1:1, and the content of cetyltrimethylammonium bromide 1 g / L.
[0037] At room temperature, immerse the purified multi-walled carbon nanotubes in a dispersant and disperse ultrasonically for 45 minutes to obtain a stable...
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