A kind of carbon fiber reinforced carbon-hafnium tantalum carbon solid solution composite material and preparation method thereof

A composite material and carbon fiber prefabricated technology, applied in the field of C/C composite material preparation, can solve the problems of low content of antioxidant components, poor thermal matching, uneven distribution, etc., to achieve enhanced antioxidant performance, excellent oxidation resistance, The effect of simple process

Active Publication Date: 2021-10-29
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention solves the problems of low content of anti-oxidation components, uneven distribution and poor thermal matching in the matrix of the existing modified C / C composite material, and simultaneously improves the high-temperature oxidation resistance and mechanical properties of the C / C composite material

Method used

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  • A kind of carbon fiber reinforced carbon-hafnium tantalum carbon solid solution composite material and preparation method thereof
  • A kind of carbon fiber reinforced carbon-hafnium tantalum carbon solid solution composite material and preparation method thereof
  • A kind of carbon fiber reinforced carbon-hafnium tantalum carbon solid solution composite material and preparation method thereof

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preparation example Construction

[0032] The present invention provides a C in the first aspect f / C-Ta x The preparation method of HfC composite material, described method comprises the steps:

[0033] (1) A carbon fiber preform deposited with a pyrolytic carbon interface layer was impregnated with phenolic resin (C f prefabricated body), and then the impregnated carbon fiber prefabricated body is sequentially subjected to the steps of solidification and pyrolysis;

[0034] (2) Repeat step (1) 2 to 5 times (eg 2, 3, 4 or 5 times) to obtain a composite material containing a C matrix (carbon matrix);

[0035] (3) impregnating the composite material containing the C matrix with the hafnium tantalum carbon precursor solution, and then performing the steps of curing and pyrolysis of the impregnated composite material containing the C matrix sequentially; the hafnium tantalum carbon precursor solution The molar ratio is 1:(2~4):(3~5) (eg 1:2:3, 1:2:4, 1:2:5, 1:3:3, 1:3:4, 1 :3:5, 1:4:3, 1:4:4 or 1:4:5) hafnium ...

Embodiment approach

[0050] According to some specific embodiments, the C f / C-Ta x The preparation method of HfC composite material comprises the following steps:

[0051] ①Preparation of C matrix: Completely impregnate the carbon fiber prefabricated body with the pyrolytic carbon interface layer in the phenolic resin, immerse for 1 to 3 hours in an environment with a vacuum degree of 5 to 100kPa, and then immerse it at 150 to 220°C under a pressure of 3 to 3 Cross-linking and curing in a 10MPa pressure tank for 5-10 hours; the cured preform is placed in a cracking furnace, and cracked at a high temperature of 700-1000°C for 2-5 hours. Repeat the above process 2 to 5 times, so that the density of the composite material containing the C matrix is ​​1.0 to 1.4 g / cm 3 .

[0052] ②C-Ta x Preparation of the HfC transition matrix: The composite material containing the C matrix in step ① is completely immersed in the hafnium-tantalum-carbon precursor solution, immersed for 1-3 hours in an environmen...

Embodiment 1

[0057] a C f / C-Ta x The preparation method of HfC composite material, its concrete steps are:

[0058] ①Preparation of C matrix: The carbon fiber prefabricated body deposited with the pyrolytic carbon interface layer is completely impregnated in phenolic resin, impregnated for 3 hours in an environment with a vacuum degree of 10kPa, and then cross-linked and cured in a pressure tank at 200°C and a pressure of 5MPa 5 hours; the cured preform is placed in a cracking furnace and cracked at a high temperature of 900° C. for 3 hours. Repeat the above process twice, so that the density of the composite material containing the C matrix is ​​1.1g / cm 3 .

[0059] ②C-Ta x Preparation of HfC transition matrix: In terms of molar parts, 1 part of hafnium-tantalum precursor, 2 parts of phenolic resin and 3 parts of alcohol solvent (ethylene glycol) were prepared into a hafnium-tantalum-carbon precursor solution. Completely immerse the composite material containing the C matrix in step...

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Abstract

The invention relates to a carbon fiber reinforced carbon-hafnium-tantalum-carbon solid solution composite material and a preparation method thereof. The preparation method includes preparing a pyrolytic carbon interface layer on a carbon fiber preform by chemical vapor infiltration, preparing a C matrix by using a pyrolysis method or a precursor impregnation cracking method, and then preparing a C matrix by impregnating a hafnium-tantalum carbon ceramic precursor. Ta x HfC transition matrix, and finally Ta x HfC matrix. C prepared by the present invention f / C‑Ta x HfC composites contain uniformly distributed C‑Ta x HfC transition matrix, can increase the first C matrix and anti-oxidation Ta x The thermal matching of HfC matrix enhances the mechanical properties of composite materials; the C prepared by the present invention f / C‑Ta x Ta in HfC composites x The high content of HfC can significantly enhance the oxidation resistance of the composite.

Description

technical field [0001] The invention belongs to the technical field of C / C composite material preparation, and in particular relates to a C / C composite f / C-Ta x HfC composite material and preparation method thereof. Background technique [0002] C / C composite materials have low density, high temperature resistance, ablation resistance, thermal shock resistance and other properties, and have excellent performance above 3000 °C. As high temperature structural materials, they are widely used in solid rocket motors, aircraft hot end components, aircraft Brake discs, etc. However, since the C / C composite material is composed of C element, when the temperature is above 400°C, C is easy to react with oxygen to form carbon oxides, which are lost in the form of gas, resulting in poor high temperature oxidation resistance of the C / C composite material. Therefore, it is necessary to carry out anti-oxidation modification on C / C composites to meet the service environment of high-temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/84C04B35/83C04B35/622
CPCC04B35/622C04B35/83C04B2235/3839C04B2235/77C04B2235/96C04B2235/9684
Inventor 裴雨辰刘伟宋环君于艺张宝鹏刘俊鹏
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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