A kind of high entropy ceramic matrix composite material and preparation method thereof

Abstract

The invention relates to a high-entropy ceramic matrix composite material and a preparation method thereof. Described method comprises the steps: (1) preparation comprises (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) High-entropy ceramic slurry of C high-entropy ceramic powder and phenolic resin; (2) impregnating the porous carbon / carbon green body with the high-entropy ceramic slurry, and then performing the steps of solidification and high-temperature cracking in sequence to obtain high-entropy ceramics (3) performing liquid silicon infiltration reaction in the high-entropy ceramic-matrix composite material intermediate obtained in step (2) to prepare a high-entropy ceramic-matrix composite material. The high-entropy ceramic matrix composite prepared by the method of the present invention comprises high-modulus, high-temperature-resistant (Ti x1 Zr x2 f x3 Nb x4 Ta x5 ) C matrix and SiC matrix, with excellent mechanical properties and high temperature ablation resistance.

Description

A kind of high entropy ceramic matrix composite material and preparation method thereof technical field The invention belongs to the technical field of ceramic matrix composite material preparation, in particular to a kind of high entropy ceramic matrix composite material and its preparation method. Background technique High-entropy ceramics is a new type of single-phase solid solution ceramics containing multiple components, and the content of each component is similar. High type entropy, higher strength, modulus, hardness, melting point and better corrosion resistance than traditional ceramics. carbide high entropy ceramics Porcelain has a rock-salt structure, strong covalent bond characteristics and high melting point, and can be used in various extreme service environments. An important development direction of a generation of thermal structural materials. [0003] Sarker et al. (see: Nature Communications 2018, 9, 4980-4988) calculated Ti, Zr, The formation a...

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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

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