Self-lubricating ceramic composite material with biomimetic structure and preparation method thereof
A ceramic composite material and composite material technology are applied in the field of high-performance ceramic composite materials and their preparation to achieve the effects of avoiding adverse effects, low organic content, and facilitating industrial production
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Embodiment 1
[0015] Add 20 grams of tetragonal zirconia powder into 8 ml of aqueous solution containing 1 gram of acrylamide and 0.08 gram of N,N'-methylenebisacrylamide, perform ultrasonication for 10 minutes, and then ball mill for 4 hours. The ball-milled slurry was degassed in vacuum for 10 minutes, 0.01 g of ammonium persulfate and tetramethylethylenediamine were added respectively, and then injected into a mold with a thickness of 2 mm and polymerized at 40° C. for 30 minutes to obtain a molded body. Spray a molybdenum disulfide film with a thickness of 15-20 μm on the green body. After the solidified green body is removed from the mold, it is cut into thin slices with a size of 25×25 mm, and placed at room temperature for 6 hours before being placed in the Continue drying in an oven at 80°C for 12 hours. Alternately stack the above-prepared green bodies into a layered green body, pressurize in a steel mold with a tablet press, the pressure is 100 MPa, and the constant pressure time ...
Embodiment 2
[0017] Add 10 g of alumina powder into 5 ml of aqueous solution containing 0.5 g of acrylamide and 0.05 g of N,N'-methylenebisacrylamide, perform ultrasonication for 10 minutes, and then ball mill for 4 hours. The slurry after ball milling was vacuum defoamed for 10 minutes, 0.005 g of ammonium persulfate and tetramethylethylenediamine were added respectively, and then injected into a mold with a thickness of 2.5 mm and polymerized to obtain a molded green body. Spray a molybdenum disulfide film with a thickness of 15-20 μm on the green body. After the solidified green body is removed from the mold, it is cut into thin slices with a size of 25×25 mm, and then laminated alternately to form a layered green body. Pressurize in a steel mold with a pressure of 150 MPa and a constant pressure time of 15 minutes to obtain the desired ceramic green body. The formed green body was sintered in a hot-press sintering furnace, the sintering temperature was 1550°C, the pressure was 25MPa, t...
Embodiment 3
[0019] Add 10 g of alumina powder into 5 ml of aqueous solution containing 0.5 g of acrylamide and 0.05 g of N,N'-methylenebisacrylamide, perform ultrasonication for 10 minutes, and then ball mill for 4 hours. The ball-milled slurry was defoamed in vacuum for 10 minutes, 0.005 ammonium persulfate solution and tetramethylethylenediamine were added respectively, and then injected into a mold with a thickness of 2.5 mm and polymerized at 40° C. for 30 minutes to obtain a molded body. A graphite film with a thickness of 20 to 30 μm is sprayed on the green body. After the solidified green body is demoulded, it is cut into sheets with a size of 25×25 mm, and then laminated alternately to form a layered green body. Pressurize in the mould, the pressure is 120 MPa, and the constant pressure time is 15 minutes to obtain the required ceramic green body. The formed green body was sintered in a hot-press sintering furnace, the sintering temperature was 1550°C, the pressure was 30MPa, the ...
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