A kind of preparation method of carbon/silicon carbide-zirconium carbide ceramic matrix composite material

A carbon composite material, silicon zirconium alloy technology, applied in ceramic products, other household appliances, household appliances and other directions, can solve the problem of uneven distribution of matrix, uneven density of inner and outer layers, affecting the performance of ceramic matrix composite materials, etc. The effect of less salt dosage and shorter preparation cycle

Active Publication Date: 2022-08-09
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved in the present invention is to prepare carbon / carbon composite materials based on the traditional chemical vapor deposition method, which can easily lead to uneven density of the inner and outer layers, and more closed cells at the same time, resulting in the inability of the alloy to completely infiltrate in the subsequent reaction infiltration , and eventually there will be uneven matrix distribution, which will affect the performance of ceramic matrix composites.

Method used

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  • A kind of preparation method of carbon/silicon carbide-zirconium carbide ceramic matrix composite material
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  • A kind of preparation method of carbon/silicon carbide-zirconium carbide ceramic matrix composite material

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preparation example Construction

[0033] In a first aspect, the present invention provides a preparation method of a porous carbon / carbon composite material, the preparation method comprising the following steps:

[0034] (1) Provide carbon fiber preforms;

[0035] (2) using citrate as the precursor, adopting the precursor impregnation cracking method to form a porous carbon matrix with pores inside the carbon fiber preform;

[0036] (3) soaking the porous carbon matrix in a hydrochloric acid solution, removing the carbonate formed by sintering inside the lime through a chemical reaction, and obtaining a porous carbon / carbon composite material for removing carbonate;

[0037] (4) drying the porous carbon / carbon composite material obtained in step (3) to obtain a dry porous carbon / carbon composite material;

[0038] (5) Repeat steps (2) to (4) at least once to obtain the porous carbon / carbon composite material.

[0039] According to some preferred embodiments, in step (1), the carbon fiber preform is pretreat...

Embodiment 1

[0066] S1. Pretreatment: Place the commercially purchased carbon fiber preform (purchased from Jiangsu Tianniao Company) in a high-temperature furnace, pass nitrogen gas at a flow rate of 1000 sccm, raise the temperature to 1700 °C, and maintain a constant temperature for 10 hours to remove residual pollution on the surface. thing.

[0067] S2. Preparation of porous carbon matrix: the above-mentioned preform is immersed in a precursor solution prepared with sodium citrate and deionized water in a mass ratio of 1:0.5, and vacuum immersed for 60 minutes. After being taken out, the obtained material was placed in a high-temperature cracking furnace, and raised to 700° C. under the protection of nitrogen to ensure that the sodium citrate was fully cracked to prepare a porous carbon matrix.

[0068] S3, introducing hydrochloric acid to remove the sodium carbonate particles formed inside: soaking the above-mentioned porous carbon matrix in 0.1 mol / L HCl solution, the reaction time i...

Embodiment 2

[0074] The present embodiment 2 is basically the same as the embodiment 1, except that:

[0075] In S2, the pyrolysis temperature of sodium citrate is 800°C.

[0076] Results: Porous carbon / carbon composites with higher crystallinity and higher degree of reaction than those in Example 1 were obtained. The XRD of the porous carbon / carbon composite is as follows: image 3 shown.

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Abstract

The invention relates to a preparation method of a carbon / silicon carbide-zirconium carbide ceramic matrix composite material. The preparation method can form a porous carbon matrix with relatively uniform pore distribution inside the carbon fiber preform, which is conducive to the infiltration of more alloys into the matrix, thereby obtaining a carbon / silicon carbide-zirconium carbide ceramic matrix composite material with uniform distribution in the matrix. The problem of poor performance stability due to uneven distribution of the matrix in the carbon / silicon carbide-zirconium carbide composite material is solved.

Description

technical field [0001] The invention relates to the technical field of ceramic matrix composite materials, in particular to a preparation method of a carbon / silicon carbide-zirconium carbide ceramic matrix composite material. Background technique [0002] With the rapid development of space vehicles, higher requirements have been placed on the working temperature and service time of the thermal structural components of the aircraft. As a high-performance thermal protection material, ceramic matrix composites can maintain a very low ablation rate under the harsh conditions of high temperature and high-speed erosion of oxidative airflow, so as to better meet the requirements of spacecraft and rocket engine nozzles. Waiting for aircraft demand. [0003] Carbon fiber toughened ceramic matrix composites have a series of advantages such as low density, small thermal expansion coefficient, high dimensional stability of carbon / carbon composites, high strength, high modulus, and che...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/65C04B35/52C04B38/00C04B35/80C04B35/573C04B35/56
CPCC04B35/521C04B35/83C04B38/00C04B35/65C04B35/573C04B35/5622C04B2235/661C04B2235/40C04B2235/6562C04B2235/6565Y02T50/40
Inventor 杨良伟王鹏宋环君李晓东金鑫于艺霍鹏飞刘俊鹏于新民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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