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Preparation method of carbon/ceramic composite material

A technology of ceramic composite materials and carbon fiber preforms, which is applied in the field of carbon/ceramic composite material preparation, can solve the problems of long preparation cycle and low cost performance of products, and achieves the advantages of short preparation cycle, low preparation cycle and high cost performance.

Inactive Publication Date: 2016-12-14
HUNAN JIUHUA CARBON HI TECH
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing carbon / ceramic composite materials, which breaks through the introduction technology of ceramic matrix in the traditional carbon / ceramic composite material preparation process, overcomes the long preparation period of traditional carbon / ceramic composite material preparation technology, and the low cost performance of products. question

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0022] (1) Put SiC ceramic powder with a purity of 99% and a deionized aqueous solution on a ball mill, and ball mill for 24 hours at a speed of 200r / min to form a SiC slurry with a solid content of 80%;

[0023] (2) Fix the PAN-based carbon fiber prefabricated body, inject SiC slurry into it under pressure, and obtain a SiC / C composite material wet embryo;

[0024] (3) Dry the wet embryo of SiC / C composite material at 100°C for 36 hours to obtain the dry embryo of carbon / ceramic composite material;

[0025] (4) Place the dry embryo of SiC / C composite material in a high-temperature sintering furnace under vacuum atmosphere and start to heat up from room temperature to 300°C at a heating rate of 5°C / min to remove volatile matter in the embryo body; then adjust the heating rate to 3 ℃ / min, the temperature is raised to 1600°C to remove impurities such as ceramic oxides; then the temperature is raised from 1600°C to 2400°C at a rate of 1°C / min to enter the ceramic matrix recrystal...

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Abstract

The invention discloses a preparation method of a carbon / ceramic composite material and aims at solving the problems that a traditional preparation method of the carbon / ceramic composite material is long in production cycle, high in cost and the like. The preparation method of a carbon / ceramic composite material comprises four steps of preparing ceramic slurry, grouting, carrying out dehumidification, performing recrystallization and sintering, and the sintering is carried out according to a temperature curve, and compact ceramic matrix coating layers are formed on the surfaces of carbon fibers to prepare the carbon / ceramic composite material. The preparation method of the carbon / ceramic composite material disclosed by the invention can be quickly sintered and is short in preparation cycle, and the bending strength of the prepared carbon / ceramic composite material reaches 130-150 Mpa.

Description

technical field [0001] The invention belongs to the field of carbon / ceramic composite material preparation, and relates to a technology for introducing a ceramic matrix into a carbon / ceramic composite material and a preparation method thereof, in particular to a technology for introducing a ceramic matrix into a carbon fiber prefabricated body and the preparation of a carbon / ceramic composite material method. Background technique [0002] The research on the preparation technology of carbon / ceramic composite materials in various countries began in the 1980s. So far, the more mature preparation technologies include chemical vapor infiltration (CVI), precursor impregnation pyrolysis (PIP), and reactive melt infiltration ( RMI), Hot Press Sintering (HPS), etc. The CVI method uses organic matter such as silicon as the ceramic source, and the fiber preform as the embryo body. After the gas penetrates into the preform at high temperature, the cracking characteristics of the gaseo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/565C04B35/64
CPCC04B35/80C04B35/565C04B35/64C04B2235/77C04B2235/96
Inventor 陈青华孙小生
Owner HUNAN JIUHUA CARBON HI TECH
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