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Three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina composite ceramic composite material and preparation method thereof

A fiber preform and three-dimensional silicon carbide technology, which is applied in the field of fiber reinforced ceramic matrix composite materials, can solve the problem of less gaseous raw materials, unsatisfactory deposition characteristics, and no three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina composite ceramics. Research reports on composite materials, etc., to achieve the effect of overcoming brittleness, excellent oxidation resistance, and excellent mechanical properties

Active Publication Date: 2020-03-17
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.
There is no research report on the preparation of three-dimensional silicon carbide fiber preforms reinforced yttrium oxide-alumina composite ceramic composites by liquid phase method

Method used

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  • Three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina composite ceramic composite material and preparation method thereof
  • Three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina composite ceramic composite material and preparation method thereof
  • Three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina composite ceramic composite material and preparation method thereof

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Effect test

Embodiment 1

[0043] A three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina composite ceramic composite material of the present invention, comprising a three-dimensional silicon carbide fiber preform and yttrium oxide-alumina composite ceramics, wherein the yttrium oxide-alumina composite ceramics is the matrix, the three-dimensional silicon carbide fiber preform is the reinforcing phase, and the yttrium oxide-alumina composite ceramic is uniformly filled in the gaps of the three-dimensional silicon carbide fiber preform, and in the yttrium oxide-alumina composite ceramic matrix, Y 2 o 3 / Al 2 o 3 The molar ratio is 3:5 (corresponding to the YAG crystal phase composition). In this implementation, the porosity of the three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina multiphase ceramic composite material is 11.2%.

[0044] In this embodiment, the three-dimensional silicon carbide fiber preform is a three-dimensional silicon carbide ...

Embodiment 2

[0056] A three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina composite ceramic composite material of the present invention, comprising a three-dimensional silicon carbide fiber preform and yttrium oxide-alumina composite ceramics, wherein the yttrium oxide-alumina composite ceramics as the matrix, Al 2 o 3 The molar content in the composite ceramic is 5%, the three-dimensional silicon carbide fiber preform is the reinforcing phase, and the yttrium oxide-alumina composite ceramic is evenly filled in the gaps of the three-dimensional silicon carbide fiber preform. In this implementation, the three-dimensional silicon carbide The porosity of the fiber preform reinforced yttrium oxide-alumina multiphase ceramic composite is 8.9%.

[0057] In this embodiment, the three-dimensional silicon carbide fiber preform is a three-dimensional four-way braided three-dimensional silicon carbide fiber preform, and the volume fraction of fibers in the three-dimensio...

Embodiment 3

[0069] A three-dimensional silicon carbide fiber preform reinforced yttrium oxide-alumina composite ceramic composite material of the present invention, comprising a three-dimensional silicon carbide fiber preform and yttrium oxide-alumina composite ceramics, wherein the yttrium oxide-alumina composite ceramics as the matrix, Al 2 o 3 The molar content in the composite ceramics is 95%, the three-dimensional silicon carbide fiber preform is the reinforcing phase, and the yttrium oxide-alumina composite ceramic is evenly filled in the gaps of the three-dimensional silicon carbide fiber preform. In this implementation, the three-dimensional silicon carbide The porosity of the fiber preform reinforced yttrium oxide-alumina composite ceramic composite is 13.7%.

[0070] In this embodiment, the three-dimensional silicon carbide fiber preform is a three-dimensional silicon carbide fiber preform with a two-dimensional semi-woven structure, and the volume fraction of fibers in the thr...

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Abstract

The invention discloses a three-dimensional silicon carbide fiber preform enhanced yttrium oxide-aluminum oxide complex-phase ceramic composite material and a preparation method thereof. The compositematerial comprises a three-dimensional silicon carbide 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 silicon carbide fiber preform are uniformly filled with the yttrium oxide-aluminum oxide complex-phase ceramic, and the porosity of the three-dimensional silicon carbide fiber preform enhanced yttrium oxide-aluminum oxide complex-phase ceramic composite material is 8%-14%. 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 advantages of 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 silicon carbide 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/10C04B35/505C04B35/624C04B35/84C04B35/622C04B35/63
Inventor 马青松曾宽宏
Owner NAT UNIV OF DEFENSE TECH
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