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Self-lubricating ceramic composite material with biomimetic structure and preparation method thereof

A ceramic composite material and composite material technology, applied in the field of high-performance ceramic composite materials and their preparation, to achieve the effects of convenient industrial production, simple molding process, and uniform structure

Active Publication Date: 2011-06-15
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these studies mainly focus on the preparation and mechanical properties of the material, and there are few reports on its lubrication technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a self-lubricating ceramic composite material with a biomimetic structure and a preparation method thereof. The composite material has a structure which is alternately laminated by ceramic layers and lubricating layers, wherein the ceramic layer is ZrO2, Al2O3, or ZrO2-Al2O3, and the lubricating layer is made of graphite, molybdenum disulfide, or hexagonal boron nitride. The composite material has excellent friction and abrasion performance.

Description

technical field [0001] The invention belongs to the technical field of high-performance ceramic composite material and its preparation, and relates to a self-lubricating ceramic composite material with a bionic structure and a preparation method thereof. Background technique [0002] Lubrication is a common problem of moving machinery. From space machinery to ground equipment, from micro-machines to super-large aircraft carriers, as long as mechanical movement is involved, lubrication problems are all involved. As the operating conditions of modern machinery become more and more harsh, the conditions become more and more complex, and the requirements for high precision, high reliability and long life are constantly increasing, there is a need for high-performance lubricants and lubricants that break through the performance limits of original lubricants The need for technology is also becoming more and more urgent. Ceramic self-lubricating composite material is a new type of...

Claims

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Application Information

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IPC IPC(8): B32B18/00C04B41/85
Inventor 张永胜齐亚娥胡丽天
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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