Three-dimensional carbon fiber preform enhanced yttrium oxide-aluminum oxide complex-phase ceramic composite material and preparation method thereof

Abstract

The invention discloses a three-dimensional carbon fiber preform enhanced yttrium oxide-aluminum oxide complex-phase ceramic composite material and a preparation method thereof. The composite materialcomprises a three-dimensional carbon fiber preform and yttrium oxide-aluminum oxide complex-phase ceramic, in the yttrium oxide-aluminum oxide complex-phase ceramic, the molar content of Al2O3 is 5%-95%, pores of a three-dimensional carbon fiber preform are uniformly filled with the yttrium oxide-aluminum oxide complex-phase ceramic, and the porosity of the three-dimensional carbon fiber preformenhanced yttrium oxide-aluminum oxide complex-phase ceramic composite material is 10%-15%. The preparation method comprises the following steps; (1) preparing yttrium oxide-aluminum oxide composite sol; (2) carrying out dipping; (3) drying; (4) carrying out heat treatment; and (5) repeating a dipping-drying-heat treatment process in the step (2)-step (4). The composite material has the advantagesof low porosity, high compactness, high temperature resistance, oxidation resistance, excellent mechanical property and the like. The preparation method is high in preparation efficiency, and the compactness and mechanical property of the prepared composite material are improved remarkably.

Description

technical field [0001] The invention relates to the technical field of high temperature resistant fiber reinforced ceramic matrix composite materials, in particular to a three-dimensional carbon fiber preform reinforced yttrium oxide-alumina composite ceramic composite material and a preparation method thereof. Background technique [0002] Yttrium oxide-alumina composite ceramics is an excellent high-temperature-resistant ceramic material, which has the advantages of high temperature resistance, oxidation resistance, creep resistance, and corrosion resistance. There are three transition compounds in the yttrium oxide-alumina binary system, which are the cubic yttrium aluminum garnet (YAG, whose composition is 3Y 2 o 3 5Al 2 o 3 ), monoclinic yttrium aluminum monoclinic (yttrium aluminum monoclinic, YAM, composed of 2Y 2 o 3 ·Al 2 o 3 ) and distorted perovskite structure and hexagonal yttrium aluminate (yttrium aluminum perovskite, YAP, composed of Y 2 o 3 ·Al 2 o ...

AI Technical Summary

Problems solved by technology

Moreover, for fiber-reinforced yttrium oxide-alumina multiphase ceramic composites, it is currently suitable for depositing Y 2 o 3 and Al 2 o 3 The gaseous raw material is too little, and the deposition characteristics are not ideal, while the liquid raw material is relatively easy to obtain, and the performance is reliable.

So far, there is no research report on the preparation of three-dimensional carbon fiber preform reinforced yttrium oxide-alumina composite ceramic composites by liquid phase method

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