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Manufacturing method ceramic-based composite part with three-stage pores

A composite material and manufacturing method technology, applied in the field of ceramic parts manufacturing, can solve the problems of poor uniformity of pore distribution and inability to manufacture pores with small pore diameters, and achieve the effects of good uniformity, good surface quality and high specific surface area

Active Publication Date: 2017-09-12
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the current preparation methods of porous ceramic materials, the method of adding pore-forming agents produces poor pore distribution uniformity, and the organic foam impregnation method cannot produce pores with small pore sizes.

Method used

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  • Manufacturing method ceramic-based composite part with three-stage pores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1) Use UG 3D modeling software to design the 3D model of the part, and output the STL file. Use the rapid prototyping post-processing software Magics to add the necessary support structure to the model, and slice and layer. Import the processed data files into the shell of the parts manufactured by the SPS600B photocuring molding equipment. The molding process parameters are set as follows: UV beam power is 250mW, filling scanning speed is 4500.00mm / s, filling vector spacing is 0.10mm, supporting scanning speed is 1200.00mm / s, jumping speed is 1200.00mm / s, contour scanning speed is 4000.00mm / s, The layer thickness is 70-100μm, the spot compensation diameter is 150μm, and the lifting speed of the worktable is 3.00mm / s. After processing, clean with industrial alcohol to remove the liquid residual resin material on the surface and remove the support, put it into an ultraviolet curing box for further curing, and obtain a resin mold with a layered structure inside.

[0057...

Embodiment 2

[0065] 1) Use UG 3D modeling software to design the 3D model of the part, and then make the resin shell of the part through SLA light curing molding technology.

[0066] 2) Mix the organic monomer (acrylamide AM) and the crosslinking agent (N,N'-methylenebisacrylamide MBAM) at a mass ratio of 5:1, and then dissolve it at room temperature (25°C) to deionized In water, a water-based premix solution with a mass fraction of 15% is prepared. Slowly add the mixed powder of micron-sized silicon nitride and boron carbide and carbon fiber into the dispersed water-based premix to obtain a ceramic slurry with a solid content of 10%. The amount of carbon fiber added accounts for 5%, and then add an aqueous solution of tetramethylammonium hydroxide with a mass fraction of 25% as a dispersant, and the amount of the dispersant added is 1.5% of the total mass of the ceramic powder to obtain a premixed slurry. Then put the premixed slurry into a mechanical stirrer and stir for 30 minutes to f...

Embodiment 3

[0073] 1) Use UG 3D modeling software to design the 3D model of the part, and then make the resin shell of the part through SLA light curing molding technology.

[0074]2) Mix the organic monomer (acrylamide AM) and the cross-linking agent (N,N'-methylenebisacrylamide MBAM) at a mass ratio of 25:1, and then dissolve it at room temperature (25°C) to deionized In water, it is prepared into a water-based premix with a mass fraction of 25%. Slowly add micron-sized zirconium boride and carbon fiber mixed powder into the dispersed water-based premix to obtain a ceramic slurry with a solid content of 45%. The amount of carbon fiber added accounts for 25% of the total mass of the slurry, and then the mass fraction is A 25% aqueous solution of tetramethylammonium hydroxide was used as a dispersant, and the amount of the dispersant added was 2% of the total mass of the ceramic powder to obtain a premixed slurry. Then put the premixed slurry into a mechanical stirrer and stir for 10 min...

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Abstract

The invention relates to a manufacturing method a ceramic-based composite part with three-stage pores. The manufacturing method includes: making a part resin shell with openings at two ends; preparing organic monomer, a crosslinking agent, carbon fiber and ceramic powder into suspension slurry, and pouring the suspension slurry into the part resin shell; arranging a temperature field to enable a solvent in the suspension slurry to being cooled, solidified and directionally crystallized along a temperature gradient direction, shelling after the suspension slurry is completely solidified for vacuum freeze-drying, holding temperature at 800-1200 DEG C in a vacuum condition, and removing organic matter to obtain a ceramic part porous body; using a CVD / CVI method to deposit a SiC interface layer on the surface of the carbon fiber inside the ceramic part porous body; in an oxygen-containing atmosphere, burning off the carbon fiber inside the ceramic part porous body to obtain the ceramic-based composite part. Quick forming technology and gel casting technology are combined to prepare a porous structure material with uniform pores in certain distribution direction.

Description

technical field [0001] The invention relates to the field of manufacturing ceramic parts, in particular to a method for manufacturing a ceramic matrix composite material part with tertiary pores. Background technique [0002] Ceramic matrix composites with multi-level pores, represented by SiC, are resistant to strong acid and high temperature, and can be made into filter devices that meet harsh conditions such as high temperature and strong acid. It also has broad application prospects in the field of dry dust removal such as coke oven gas and automobile exhaust. [0003] Ceramic matrix composites with multi-level pores have high specific surface area, porosity, high temperature resistance, high hardness and high strength, making them good supports for catalysts. In addition, the stable chemical properties of ceramic matrix composites are also a huge advantage as catalyst supports. [0004] Utilizing the heat insulation effect of closed cells in ceramic matrix composites ...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/565C04B35/563C04B35/584C04B35/58C04B35/622C04B35/638C04B35/64B33Y40/00
CPCC04B35/563C04B35/565C04B35/58078C04B35/584C04B35/622C04B35/638C04B35/64C04B38/0605C04B38/067C04B38/068B33Y40/00C04B2235/3826C04B2235/46C04B2235/6581C04B2235/6567C04B2235/6562C04B2235/6026C04B38/007C04B38/0054
Inventor 鲁中良曹继伟赵洪炯苗恺冯朋帅李涤尘卢秉恒
Owner XI AN JIAOTONG UNIV
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