Diamond gradient coating and preparation method and application thereof
A gradient coating and diamond technology, applied in metal material coating process, coating, gaseous chemical plating, etc., can solve the problems of easy wear, unstable water collection materials, and difficulty in directional water collection, and achieve good collection Effect of water efficiency, good mechanical wear resistance and chemical stability
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[0020] On the one hand, the embodiment of the present invention provides a kind of preparation method of diamond gradient coating, and this preparation method comprises the following steps:
[0021] S01: providing a substrate, and performing a hydrophilic treatment on the surface of the substrate;
[0022] S02: placing the hydrophilic treated substrate in a nanodiamond suspension, and performing crystal planting treatment;
[0023] S03: Depositing and growing diamond on the surface of the substrate after the crystal planting treatment, so that the concentration of nano-diamond particles and the particle size of nano-diamond particles along the direction away from the surface of the substrate are gradually increased to obtain a diamond gradient coating.
[0024] In the preparation method of the diamond gradient coating provided by the embodiment of the present invention, the surface of the substrate is firstly subjected to hydrophilic treatment to form a hydrophilic substrate s...
Embodiment 1
[0049] A kind of preparation method of diamond gradient coating, concrete operation steps are as follows:
[0050] Step 1: cleaning the surface of the titanium sheet substrate. First, use deionized water to ultrasonically clean twice, each time for 5 minutes, and finally use alcohol to ultrasonically clean for 5 minutes, and blow dry with nitrogen.
[0051] Step 2: corroding the cleaned titanium sheet to form titanium oxide and negatively charge the surface. The corrosion treatment is: ultrasonic cleaning in alkaline solution for 8 minutes, and then cleaning in deionized water for 2 minutes, wherein the alkaline solution is a mixed solution with a volume ratio of ammonia water: hydrogen peroxide: deionized water = 1:1:5.
[0052] Step 3: treating the corroded substrate with oxygen plasma to make the surface into a super-hydrophilic surface.
[0053] Step 4: Clean the super-hydrophilic surface of the substrate, and clean the solution remaining in the sheet. Use deionized wat...
Embodiment 2
[0057] A kind of preparation method of diamond gradient coating, concrete operation steps are as follows:
[0058] Step 1: Clean the surface of the silicon wafer, first use deionized water to ultrasonically clean twice, each time for 5 minutes, and finally use alcohol to ultrasonically clean for 5 minutes, and blow dry with nitrogen.
[0059] Step 2: Etching the cleaned silicon wafer to form silicon oxide and negatively charge the surface. The corrosion treatment is: ultrasonic cleaning in alkaline solution for 8 minutes, and then cleaning in deionized water for 2 minutes. The alkaline solution is a mixed solution with a volume ratio of ammonia water: hydrogen peroxide: deionized water = 1:1:5.
[0060] Step 3: Treat the corroded substrate in a mixture of concentrated sulfuric acid and potassium nitrate to make the surface super-hydrophilic.
[0061] Step 4: cleaning the super-hydrophilic treated substrate, and cleaning the etching solution remaining in the silicon wafer. U...
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