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Manufacturing method of directionally organized ceramic matrix composite spare part

A composite material and manufacturing method technology, which is applied in the field of ceramic parts manufacturing, can solve the problems of brittle fracture and low toughness of ceramics, and achieve the effect of good surface quality and high manufacturing precision

Active Publication Date: 2017-08-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strong high temperature resistance of ceramics makes it the most promising aerospace material, but the toughness of ceramics is low and easy to be brittle, so improving the toughness of ceramics is very important, and it is necessary to explore a molding method with directional tissue reinforcement inside the part

Method used

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  • Manufacturing method of directionally organized ceramic matrix composite spare part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 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.

[0058...

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) according to the mass ratio of 5:1, and then dissolve them in deionized water at room temperature to prepare A water-based premix with a mass fraction of 15%. Slowly add a mixture of micron-sized silicon nitride and boron carbide ceramic powders and short fibers into the dispersed premix to obtain a ceramic slurry with a solid phase content of 20%, in which the short fibers are a mixture of silicon carbide fibers and alumina fibers , and the content is 10% of the total mass of the slurry; then add an aqueous solution of 25wt% tetramethylammonium hydroxide as a dispersant, and the amount of the dispersant is 1.5% of the total mass of ceramic powder and short fibers to obtain a premixed slurry material. The...

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 them in deionized water at room temperature to prepare A water-based premix with a mass fraction of 25%. Slowly add the mixture of micron-sized silicon carbide ceramic powder and short fibers into the dispersed premix to obtain a ceramic slurry with a solid phase content of 30%, wherein the short fibers are silicon carbide fibers, and the content is 15% of the total mass of the slurry. %; Then add 25wt% aqueous solution of tetramethylammonium hydroxide as a dispersant, and the amount of dispersant added is 2% of the total mass of ceramic powder and short fibers to obtain a premixed slurry. Then put the premixed slurry into a mechanical stirrer and stir for 40 min...

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Abstract

The invention relates to a manufacturing method of a directionally organized ceramic matrix composite spare part. The manufacturing method includes steps of firstly manufacturing a spare part resin shell with two opened ends; preparing suspending slurry by monomer, crosslinking agent and ceramic powder, and pouring the suspending slurry in the spare part resin shell; cooling, solidifying and directionally crystalizing solvent in the suspending slurry along the direction of temperature gradient by arranging a temperate field; vacuum-freezing and drying the suspending slurry after being solidified completely, then preserving temperature at 900-1200 DEG; removing organic matters to obtain a ceramic spare part porous body; depositing a SiC interface on the inner fiber surface of the ceramic spare part porous body by a CVD / CVI method; applying precursor infiltration and pyrolysis to densify the ceramic spare part porous body deposited with the SiC interface to obtain the directionally organized ceramic matrix composite spare part. Through controlling solvent crystal under low temperature, and rapid shaping, fiber enhancement, precursor infiltration and pyrolysis and other technical steps, the directional organization is formed; the reinforcement and toughening can be realized effectively.

Description

technical field [0001] The invention relates to the field of manufacturing ceramic parts, in particular to a method for manufacturing parts made of directional tissue ceramic matrix composite materials. Background technique [0002] In the field of aerospace, many parts need to work at high temperatures, and the use temperature of superalloys restricts its development. The strong high temperature resistance of ceramics makes it the most promising aerospace material, but the toughness of ceramics is low and easy to be brittle, so improving the toughness of ceramics is very important, and it is necessary to explore a molding method with directional tissue reinforcement inside the part . Contents of the invention [0003] The purpose of the present invention is to overcome the problems existing in the prior art, and provide a method for manufacturing oriented ceramic matrix composite parts, which uses the oriented pores produced by solvent crystallization to toughen the cera...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B35/80C04B35/563C04B35/565C04B35/571C04B35/628B28B1/00B28B11/00B28C3/00
CPCC04B35/563C04B35/565C04B35/571C04B35/62863C04B38/0605C04B38/061B28B1/007B28B11/00B28C3/00C04B2235/616C04B2235/614C04B2235/5454C04B2235/5445C04B2235/5436C04B2235/5248C04B2235/5244C04B35/806C04B38/0054
Inventor 鲁中良赵洪炯曹继伟苗恺冯朋帅李涤尘卢秉恒
Owner XI AN JIAOTONG UNIV
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