Carbon fiber reinforced carbon-silicon carbide-zirconium carbide composite material and preparation method thereof

A composite material and carbon fiber technology, which is applied in the field of carbon fiber-reinforced carbon-silicon carbide-zirconium carbide composite materials and its preparation, can solve the problem of uneven distribution of metal and carbon matrix, inability to fully react metal and carbon matrix, and affecting ceramic matrix composites Material anti-oxidation, ablation resistance and other issues to achieve the effect of avoiding the accumulation of metal powder, improving the ablation resistance and reducing the preparation cost

Active Publication Date: 2020-05-05
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the RMI process generally uses liquid molten metal to infiltrate C / C porous bodies to obtain ceramic matrix composites. The liquid metal reacts with C to form a ceramic matrix. Due to the uneven distribution of the metal and carbon matrix, the metal and carbon matrix cannot fully react.
Therefore, the ceramic matrix composites prepared by RMI have a large amount of free metal elements and carbon matrix, which affect the oxidation resistance and ablation resistance of ceramic matrix composites.

Method used

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  • Carbon fiber reinforced carbon-silicon carbide-zirconium carbide composite material and preparation method thereof

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preparation example Construction

[0028] The present invention provides a kind of preparation method of carbon fiber reinforced carbon-silicon carbide-zirconium carbide composite material in the first aspect, described method comprises the following steps:

[0029] (1) Deposit pyrolytic carbon matrix on the carbon fiber surface that carbon fiber prefabricated body comprises, make modified carbon fiber prefabricated body (low density C / C green body); The PyC matrix (pyrolytic carbon matrix) is prepared inside the pure mesh needle-punched preform or carbon fiber carbon felt, so that the carbon fiber surface contained in the carbon fiber preform is deposited with a pyrolytic carbon matrix, and the obtained density is 0.8-1.2g / cm 3 low-density C / C body.

[0030] (2) Silicon powder, zirconium powder, graphite powder, phenolic resin and organic solvent are formulated into mixed resin solution; the mass ratio of silicon powder, zirconium powder, graphite powder and phenolic resin in the described mixed resin solution...

Embodiment 1

[0057] A kind of preparation method of C / C-SiC-ZrC composite material, its concrete steps are:

[0058] ①Put the carbon fiber pure mesh tire needle-punched prefabricated body into the CVI-C furnace, deposit it for 400 hours, and then undergo a high-temperature treatment at 1700°C to obtain a low-density C / C green body.

[0059] 2. Mix Si powder, Zr powder, graphite powder with a diameter not greater than 100nm and aminophenol formaldehyde resin and dilute with an alcoholic organic solvent to obtain a mixed resin solution; Si powder, Zr powder, graphite powder and ammonia in the mixed resin solution The mass ratio of phenolic resin is 1:6:5:100.

[0060] ③Using the mixed resin prepared in step ② with a mass ratio of silicon powder, zirconium powder, graphite powder and aminophenol-formaldehyde resin of 1:6:5:100 as the impregnating agent to vacuum impregnate the low-density C / C green body obtained in step ①, Then the impregnated low-density C / C green body is subjected to pressur...

Embodiment 2

[0064] A kind of preparation method of C / C-SiC-ZrC composite material, its concrete steps are:

[0065] ①Put the carbon fiber pure mesh tire needle-punched prefabricated body into the CVI-C furnace, deposit it for 400 hours, and then undergo a high-temperature treatment at 1700°C to obtain a low-density C / C green body.

[0066] 2. Mix Si powder, Zr powder, graphite powder with a diameter not greater than 100nm and aminophenol formaldehyde resin and dilute with an alcoholic organic solvent to obtain a mixed resin solution; Si powder, Zr powder, graphite powder and ammonia in the mixed resin solution The mass ratio of phenolic resin is 3:6:5:100.

[0067] ③Using the mixed resin prepared in step ② with a mass ratio of silicon powder, zirconium powder, graphite powder and aminophenol-formaldehyde resin of 3:6:5:100 as an impregnating agent to vacuum impregnate the low-density C / C green body obtained in step ①, Then the impregnated low-density C / C green body is subjected to pressu...

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Abstract

The invention relates to a carbon fiber reinforced carbon-silicon carbide-zirconium carbide composite material and a preparation method thereof. The method comprises the following steps: (1) depositing a pyrolytic carbon matrix on the surface of carbon fibers contained in a carbon fiber preform to obtain a modified carbon fiber preform; (2) preparing a mixed resin solution of silicon powder, zirconium powder, graphite powder and phenolic resin in a mass ratio of (1-3): (4-6): 5: 100; (3) impregnating the modified carbon fiber preform with the mixed resin solution, and then sequentially carrying out curing and carbonization reactions on the impregnated modified carbon fiber preform, wherein the carbonization reaction is carried out in an inert atmosphere, the temperature of the carbonization reaction is 1650-1750 DEG C, and the time is 0.5-2 hours; and (4) repeating the step (3) at least once to obtain the composite material. According to the invention, silicon carbide and zirconium carbide can be uniformly distributed in the composite material, the content of free metals is reduced, and the oxidation resistance and ablation resistance of the material are improved.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a carbon fiber reinforced carbon-silicon carbide-zirconium carbide composite material and a preparation method thereof. Background technique [0002] Carbon fiber reinforced ceramic matrix composites have the characteristics of anti-oxidation, light weight, thermal shock resistance, and excellent high-temperature performance, so they are widely used in aviation, aerospace, and automotive fields. For example, carbon fiber reinforced carbon-ceramic (C / C-SiC) composite material is a new type of high-performance thermal structural material with high specific strength, high specific modulus, corrosion resistance, thermal shock resistance and other excellent properties. The technical field has very great application potential. However, with the complexity of the service environment, higher requirements are put forward for the material system, and the...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/622
CPCC04B35/622C04B35/83C04B2235/3826C04B2235/3839C04B2235/404C04B2235/422C04B2235/428C04B2235/48C04B2235/5248C04B2235/5256C04B2235/5454C04B2235/77C04B2235/96
Inventor 王鹏于新民吴朝军杨良伟霍鹏飞刘俊鹏左红军
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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