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High-entropy ceramic-based composite material and preparation method thereof

A composite material and ceramic-based technology, which is applied in the field of preparation of ceramic-based composite materials, can solve problems such as poor toughness and high brittleness of high-entropy ceramic materials, and achieve the effects of solving brittleness problems, improving mechanical properties, and being easy to implement industrially

Active Publication Date: 2021-08-31
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the above research reports, it can be known that carbide high-entropy ceramics have excellent mechanical properties, high temperature resistance and oxidation resistance, but high-entropy ceramic materials have problems such as high brittleness and poor toughness.
[0004] At present, high-entropy ceramic materials are often used as coatings for matrix materials or compounded with additives such as silicon carbide to prepare ultra-high-temperature ceramic composites; while high-entropy ceramic materials are used as matrix and carbon fibers to prepare continuous carbon fiber-reinforced high-entropy ceramic matrix composites. The material has not been reported

Method used

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  • High-entropy ceramic-based composite material and preparation method thereof

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preparation example Construction

[0024] The present invention provides a kind of preparation method of high-entropy ceramic matrix composite material in the first aspect, described method comprises the following steps:

[0025] (1) The preparation contains (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) The high-entropy ceramic slurry of C high-entropy ceramic powder and phenolic resin (also denoted as (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) C high-entropy ceramic slurry); the solid component of the high-entropy ceramic slurry is (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) C high-entropy ceramic powder, the liquid component is a phenolic resin and is preferably a high residual carbon phenolic resin; in the present invention, the (Ti x1 Zr x2 f x3 Nb x4 Ta x5 )C high-entropy ceramic powder is a single rock-salt phase structure, which is a single-phase eutectic solution composed of Ti, Zr, Hf, Nb, Ta and C elements. The atomic percentage expression is (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) C; the present invention to the (Ti x1 Zr...

Embodiment 1

[0044] A (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) The preparation method of C high-entropy ceramic matrix composite material, its concrete steps are:

[0045] ① Preparation (Ti x1 Zr x2 f x3 Nb x4 Ta x5 )C high-entropy ceramic slurry: with (Ti x1 Zr x2 f x3 Nb x4 Ta x5 )C high-entropy ceramic powder is a solid component, and a high-carbon-residue phenolic resin with a carbon residue rate of 25% is a liquid component (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) C high-entropy ceramic slurry; the (Ti x1 Zr x2 f x3 Nb x4 Ta x5 )C high-entropy ceramic powder is a single-phase co-solution composed of Ti, Zr, Hf, Nb, Ta and C elements; wherein, x1+x2+x3+x4+x5=1, and x1, x2, x3, x4 , x5 are all taken as 0.2; the prepared high-entropy ceramic slurry contains (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) The mass percentage of C high-entropy ceramic powder is 5%.

[0046] ② Preparation (Ti x1 Zr x2 f x3 Nb x4 Ta x5 )C high-entropy ceramic matrix composite material intermediate: (Ti x1 Z...

Embodiment 2

[0052] A (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) The preparation method of C high-entropy ceramic matrix composite material, its concrete steps are:

[0053] ① Preparation (Ti x1 Zr x2 f x3 Nb x4 Ta x5 )C high-entropy ceramic slurry: with (Ti x1 Zr x2 f x3 Nb x4 Ta x5 )C high-entropy ceramic powder is a solid component, and a high-carbon-residue phenolic resin with a carbon residue rate of 25% is a liquid component (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) C high-entropy ceramic slurry; the (Ti x1 Zr x2 f x3 Nb x4 Ta x5)C high-entropy ceramic powder is a single-phase co-solution composed of Ti, Zr, Hf, Nb, Ta and C elements; wherein, x1+x2+x3+x4+x5=1, and x1, x2, x3, x4 , x5 are all taken as 0.2; the prepared high-entropy ceramic slurry contains (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) The mass percentage of C high-entropy ceramic powder is 10%.

[0054] ② Preparation (Ti x1 Zr x2 f x3 Nb x4 Ta x5 )C high-entropy ceramic matrix composite material intermediate: (Ti x1 Z...

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Abstract

The invention relates to a high-entropy ceramic-based composite material and a preparation method thereof. The method comprises the following steps: (1) preparing high-entropy ceramic slurry containing (Tix1Zrx2Hfx3Nbx4Tax5)C high-entropy ceramic powder and phenolic resin; (2) impregnating a porous carbon / carbon green body by using the high-entropy ceramic slurry, and then sequentially carrying out the steps of curing and high-temperature cracking to obtain a high-entropy ceramic-based composite material intermediate; and (3) carrying out liquid silicon infiltration reaction on the high-entropy ceramic-based composite material intermediate obtained in the step (2) to prepare the high-entropy ceramic-based composite material. The high-entropy ceramic-based composite material prepared by the method disclosed by the invention comprises a (Tix1Zrx2Hfx3Nbx4Tax5)C matrix and a SiC matrix which are high in modulus and resistant to high temperature, and has excellent mechanical and high-temperature ablation resistance.

Description

technical field [0001] The invention belongs to the technical field of preparation of ceramic-based composite materials, and in particular relates to a high-entropy ceramic-based composite material and a preparation method thereof. Background technique [0002] High-entropy ceramics are a new type of single-phase solid solution ceramics containing multiple components. The content of each component is similar, the configuration entropy is high, and it has higher strength, modulus, hardness, melting point and better than traditional ceramics. Corrosion resistance. Carbide high-entropy ceramics have rock-salt structure, strong covalent bond characteristics and high melting point. They can be applied to various extreme service environments and are an important development direction of a new generation of thermal structural materials. [0003] Sarker et al. (see: Nature Communications 2018, 9, 4980-4988) calculated the formation of 56 five-element high-entropy ceramics that can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622C04B35/84C04B35/83C04B35/80
CPCC04B35/5622C04B35/5611C04B35/5607C04B35/622C04B35/83C04B35/80C04B2235/428C04B2235/48C04B2235/3826C04B2235/77C04B2235/96
Inventor 刘伟孙同臣陈昊然杨良伟杨小健张宝鹏刘俊鹏于艺裴雨辰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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