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Method for preparing carbon fiber-reinforced ceramic-based composite material

A composite material and carbon fiber technology, applied in the field of preparation of carbon-ceramic composite materials, can solve problems such as low strength, achieve good corrosion resistance, low production cost, and short preparation process

Active Publication Date: 2019-11-26
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process uses short fibers for reinforcement, and the strength of the material is lower than that of longer fibers, and the hot pressing process can usually only produce parts with relatively simple shapes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Adopt the method of the present invention to prepare the step of carbon fiber reinforced ceramic matrix composite material as follows:

[0022] Step 1. Disperse expandable graphite

[0023] Dissolve 1000g of phenolic resin in 1500g of ethanol solvent, after fully dissolving, add 30g of expandable graphite, and continue stirring until uniform;

[0024] Step 2. Manually brush the resin solution dispersed with expandable graphite onto the surface of the orthogonally woven carbon fiber cloth to prepare a prepreg, and dry it at room temperature for 24 hours;

[0025] Step 3: Cut the prepreg obtained in Step 2 according to the shape of the mold, place it in the mold to lay up layers, and use a hot press for molding. The molding temperature is 200°C and the molding pressure is 0.6MPa to prepare a prefabricated body;

[0026] Step 4. Put the prefabricated body obtained in Step 3 into a high-temperature furnace for carbonization, the carbonization temperature is 1000° C., and t...

Embodiment 2

[0029] Adopt the method of the present invention to prepare the step of carbon fiber reinforced ceramic matrix composite material as follows:

[0030] Step 1. Disperse expandable graphite

[0031] Dissolve 1000g of phenolic resin in 2000g of ethanol solvent, after fully dissolving, add 30g of expandable graphite, and continue stirring until uniform;

[0032] Step 2. Manually brush the resin solution dispersed with expandable graphite onto the surface of the orthogonally woven carbon fiber cloth to prepare a prepreg, and dry it at room temperature for 24 hours;

[0033] Step 3. Cut the prepreg obtained in step 2 according to the shape of the mold, place it in the mold to lay up layers, make a vacuum bag, and use the autoclave process for molding. The molding temperature is 200°C and the molding pressure is 5MPa. Preparation get the prefab;

[0034] Step 4. Put the prefabricated body obtained in Step 3 into a high-temperature furnace for carbonization, the carbonization temper...

Embodiment 3

[0037] Adopt the method of the present invention to prepare the step of carbon fiber reinforced ceramic matrix composite material as follows:

[0038] Step 1. Disperse expandable graphite

[0039] Dissolve 1000g of phenolic resin in 2000g of ethanol solvent, after fully dissolving, add 10g of expandable graphite, and continue to fully stir until uniform;

[0040] Step 2. Combining the resin solution dispersed with expandable graphite with carbon fiber using wet prepreg technology to form a unidirectional tape, and drying at room temperature for 24 hours;

[0041] Step 3. Cut the unidirectional tape obtained in step 2 into a size of 200*200mm, use 0° and 90° cross-lamination, place it in a mold, and use a hot press for molding. The molding temperature is 200°C. The pressure is 5MPa, and the preform is prepared;

[0042] Step 4. Put the prefabricated body obtained in Step 3 into a high-temperature furnace for carbonization. The carbonization temperature is 1100° C. and the hol...

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PUM

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Abstract

The invention discloses a method for preparing a carbon fiber-reinforced ceramic-based composite material. According to the method, carbon fiber is adopted as a reinforcement body, the pore structureis adjusted through addition of expandable graphite to high-carbon residue resin, and the high-performance ceramic-based composite material is prepared through hot-press molding, carbonization and melting silicidation. The carbon fiber-reinforced ceramic-based composite material has a simple preparation process, low cost and a short cycle, and silicon carbide and silicon are dispersed uniformly inthe matrix of the prepared composite material.

Description

technical field [0001] The invention relates to a method for preparing a carbon-ceramic composite material, which belongs to the technical field of composite material preparation. Background technique [0002] Carbon fiber reinforced ceramic matrix composites have the advantages of low density, high temperature resistance, and good friction resistance, so they are used in aviation, aerospace, sealing rings, high-temperature furnaces, and brake discs. The main preparation process of the material includes chemical vapor deposition method, precursor impregnation cracking method, reaction infiltration method and hot pressing sintering method. Among them, the chemical vapor deposition method is to realize the deposition on the surface of the fiber through the cracking and reaction of the precursor at high temperature, and then realize the densification; the precursor impregnation cracking method is to repeatedly dip and crack the fiber braid in the liquid precursor to achieve den...

Claims

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Application Information

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IPC IPC(8): C04B35/573C04B35/577C04B35/80C04B35/83C04B35/622
CPCC04B35/573C04B35/622C04B35/83C04B2235/425C04B2235/428C04B2235/48C04B2235/616C04B2235/656C04B2235/6567C04B2235/6581
Inventor 杨金华艾莹珺姜卓钰周怡然焦健
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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