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Three-dimensional carbon fiber reinforced alumina-zirconia composite material and preparation method thereof

A technology of three-dimensional carbon fiber and composite material, which is applied in the field of three-dimensional carbon fiber preform reinforced alumina-zirconia composite ceramic composite material and its preparation, which can solve the problem that the deposition characteristics are not ideal, and no three-dimensional carbon fiber preform reinforced alumina-oxidation has been found. Research reports on zirconium composite ceramic composites, etc., to achieve the effect of improving impregnation efficiency and filling degree, high densification efficiency and good stability

Active Publication Date: 2020-06-19
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, for fiber-reinforced alumina-zirconia composite ceramic composites, currently there are too few gaseous raw materials suitable for depositing alumina and zirconia, and the deposition characteristics are not ideal. Liquid raw materials are relatively easy to obtain and have reliable performance.
So far, there is no research report on the preparation of three-dimensional carbon fiber preforms reinforced alumina-zirconia composite ceramic composites by liquid phase method

Method used

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  • Three-dimensional carbon fiber reinforced alumina-zirconia composite material and preparation method thereof
  • Three-dimensional carbon fiber reinforced alumina-zirconia composite material and preparation method thereof
  • Three-dimensional carbon fiber reinforced alumina-zirconia composite material and preparation method thereof

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Effect test

Embodiment 1

[0042] A method for preparing a three-dimensional carbon fiber reinforced alumina-zirconia composite material of the present invention, comprising the following specific process steps:

[0043] (1) Sol selection: select the alumina-zirconia composite sol with a solid phase content of 30wt% as the raw material for the alumina-zirconia composite ceramic matrix, wherein the molar ratio of alumina to zirconia is 1:0.3. Adding HNO to Aluminum-Zirconium Oxide Composite Sol 3 As a stabilizer, HNO 3 The addition amount is 25% of alumina sol weight.

[0044] (2) Pretreatment of prefabricated parts: The three-dimensional carbon fiber prefabricated part obtained by stacking and stitching carbon fiber cloth is selected as the reinforcement phase, and the volume fraction of fibers in the three-dimensional carbon fiber prefabricated part is 48%. The selected three-dimensional carbon fiber prefabricated part was placed under vacuum, the temperature was raised to 1400 °C at a rate of 20 °C / ...

Embodiment 2

[0053] A method for preparing a three-dimensional carbon fiber reinforced alumina-zirconia composite material of the present invention, comprising the following specific process steps:

[0054] (1) Sol selection: select the alumina-zirconia composite sol with a solid phase content of 35wt% as the raw material for the alumina-zirconia composite ceramic matrix, wherein the molar ratio of alumina to zirconia is 95:5. Adding HNO to Aluminum-Zirconium Oxide Composite Sol 3 As a stabilizer, HNO 3 The amount added is 20% of the weight of alumina sol.

[0055] (2) Pretreatment of prefabricated parts: The three-dimensional carbon fiber prefabricated part with three-dimensional four-way weaving structure is selected as the reinforcement phase, and the volume fraction of fibers in the three-dimensional carbon fiber prefabricated part is 53%. The selected three-dimensional carbon fiber preform was placed in a high-purity argon atmosphere, and the temperature was raised to 1800 °C at a r...

Embodiment 3

[0063] A method for preparing a three-dimensional carbon fiber reinforced alumina-zirconia composite material of the present invention, comprising the following specific process steps:

[0064] (1) Sol selection: select the alumina-zirconia composite sol with a solid phase content of 20wt% as the raw material for the alumina-zirconia composite ceramic matrix, wherein the molar ratio of alumina to zirconia is 5:95. Adding HNO to Aluminum-Zirconium Oxide Composite Sol 3 As a stabilizer, HNO 3 The amount added is 20% of the weight of alumina sol.

[0065] (2) Pretreatment of prefabricated parts: The three-dimensional carbon fiber prefabricated part with two-dimensional semi-woven structure is selected as the reinforcement phase, and the volume fraction of fibers in the three-dimensional carbon fiber prefabricated part is 46%. The selected three-dimensional carbon fiber prefabricated part was placed under vacuum, and the temperature was raised to 1400 °C at a rate of 15 °C / min a...

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Abstract

The invention discloses a three-dimensional carbon fiber reinforced alumina-zirconia composite material and a preparation method thereof. The preparation method comprises the following steps: (1) stabilizing an alumina-zirconia composite sol; (2) under vacuum immersing a three-dimensional carbon fiber preform in the alumina-zirconia composite sol; (3) drying the impregnated three-dimensional carbon fiber preform; (4) performing heat treatment; (5) repeating the impregnation, drying, and heat treatment process from the step (2)-the step(4) for the until weight gain of a three-dimensional carbonfiber reinforced alumina-zirconia composite material intermediate is less than 1% compared with that of the three-dimensional carbon fiber reinforced alumina-zirconia composite material intermediatetreated after last impregnation, drying, and heat treatment process to obtain the three-dimensional carbon fiber reinforced alumina-zirconia composite material. The three-dimensional carbon fiber reinforced alumina-zirconia composite material has the advantages of high temperature resistance, oxidation resistance and excellent mechanical properties and the like.

Description

technical field [0001] The invention belongs to the technical field of high-temperature-resistant fiber-reinforced ceramic-based composite material and its preparation, and in particular relates to a three-dimensional carbon fiber preform reinforced alumina-zirconia composite ceramic composite material and a preparation method thereof. Background technique [0002] Alumina-zirconia composite ceramics have the advantages of high temperature resistance, oxidation resistance, creep resistance and corrosion resistance of alumina and zirconia. Engine turbine blades have been more researched. As a single ceramic, the fracture toughness of alumina-zirconia composite ceramics is low, in most cases it is 4-5 MPa m 1 / 2 . Such a low fracture toughness makes it difficult for single alumina-zirconia composite ceramics to be used as structural materials in practical applications, especially in occasions with large mechanical load impact and thermal shock, toughening treatment is necessa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/84C04B35/622
CPCC04B35/10C04B35/48C04B35/622C04B35/803C04B2235/3217C04B2235/3244C04B2235/96
Inventor 马青松曾宽宏
Owner NAT UNIV OF DEFENSE TECH
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