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 propert

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1

[0015] Add 20 g of tetragonal zirconia powder to 8 ml of aqueous solution containing 1 g of acrylamide and 0.08 g of N,N'-methylenebisacrylamide, sonicate for 10 minutes and then ball mill for 4 hours. The slurry after ball milling was vacuum degassed 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 15-20μm on the body. After the cured body is demolded, it is cut into slices with a size of 25×25mm, and placed at room temperature for 6 hours before putting it in Continue to dry in an oven at 80°C for 12 hours. The prepared green bodies are alternately laminated to form a layered green body, which is pressurized in a steel mold with a tablet press at a pressure of 100 MPa and a constant pressure time of 5 minutes to obtain the desired cer...

Example Embodiment

[0016] Example 2

[0017] Add 10 g of alumina powder to 5 ml of aqueous solution containing 0.5 g of acrylamide and 0.05 g of N,N'-methylenebisacrylamide, sonicate for 10 minutes and then ball mill for 4 hours. The slurry after ball milling was vacuum degassed for 10 minutes, and 0.005 grams of ammonium persulfate and tetramethylethylenediamine were added respectively, and then injected into a mold with a thickness of 2.5 mm to polymerize to obtain a molded body. Spray the molybdenum disulfide film with a thickness of 15-20μm on the body. After the cured body is demolded, it is cut into slices with a size of 25×25mm, and then alternately laminated into a layered body, using a tablet press Press in a steel mold with a pressure of 150 MPa and a constant pressure time of 15 minutes to obtain the desired ceramic body. The formed body is sintered in a hot-pressing sintering furnace. The sintering temperature is 1550℃, the pressure is 25MPa, the holding time is 1 hour, and argon prote...

Example Embodiment

[0018] Example 3

[0019] Add 10 g of alumina powder to 5 ml of aqueous solution containing 0.5 g of acrylamide and 0.05 g of N,N'-methylenebisacrylamide, sonicate for 10 minutes and then ball mill for 4 hours. The slurry after ball milling was vacuum degassed for 10 minutes, and 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 20-30μm is sprayed on the blank. After the solidified blank is demolded, it is cut into sheets with a size of 25×25mm, and then alternately laminated into a layered blank. Press in the mold with a pressure of 120 MPa and a constant pressure time of 15 minutes to obtain the desired ceramic body. The formed body is sintered in a hot press sintering furnace at a sintering temperature of 1550°C, a pressure of 30 MPa, a holding time of 1 hour, and argon protection ...

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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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