Three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material and preparation method thereof

A technology of three-dimensional silicon carbide and silicon carbide fiber, which is applied in the field of three-dimensional silicon carbide fiber-reinforced alumina-zirconia composite materials and its preparation, can solve the problem of unsatisfactory deposition characteristics and the absence of three-dimensional silicon carbide fiber prefabricated parts reinforced alumina-zirconia Issues such as research reports on zirconia multiphase ceramic composite materials, to achieve the effects of improving impregnation efficiency and filling degree, high densification efficiency, and good stability

Active Publication Date: 2018-05-15
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 ar

Method used

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  • Three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material and preparation method thereof
  • Three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material and preparation method thereof
  • Three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material and preparation method thereof

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Effect test

Embodiment 1

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

[0043] (1) Sol selection: select the alumina-zirconia composite sol with a solid phase content of 40wt% 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 alumina-zirconia composite sol 3 As a stabilizer, HNO 3 The amount added is 30% of the weight of alumina sol.

[0044] (2) Pretreatment of prefabricated parts: The three-dimensional silicon carbide fiber prefabricated part obtained by alternate lamination of silicon carbide fiber cloth and mesh tire was selected as the reinforcement phase, and the volume fraction of fibers in the three-dimensional silicon carbide fiber prefabricated part was 24%. The selected three-dimensional silicon carbide fiber preform was placed under vacuum, the temperat...

Embodiment 2

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

[0054] (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 95:5. Adding HNO to alumina-zirconia composite sol 3 As a stabilizer, HNO 3 The addition amount is 25% of alumina sol weight.

[0055](2) Pretreatment of prefabricated parts: The three-dimensional silicon carbide fiber prefabricated part obtained by laminating and suturing silicon carbide fiber cloth is selected as the reinforcement phase, and the volume fraction of fibers in the three-dimensional silicon carbide fiber prefabricated part is 46%. The selected three-dimensional silicon carbide fiber preform is placed under vacuum, the temperature is raised to 1000°C...

Embodiment 3

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

[0064] (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 5:95. Adding HNO to alumina-zirconia composite sol 3 As a stabilizer, HNO 3 The amount added is 20% of the weight of alumina sol.

[0065] (2) Pretreatment of the prefabricated part: the three-dimensional silicon carbide fiber prefabricated part with three-dimensional four-way weaving structure is selected as the reinforcement phase, and the volume fraction of the fiber in the three-dimensional silicon carbide fiber prefabricated part is 51%. The selected three-dimensional silicon carbide fiber preform is placed in a high-purity argon atmosphere, the temperature i...

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Abstract

The invention discloses a three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material and a preparation method thereof. The preparation method comprises the following steps: (1) stabilizing aluminum oxide-zirconium oxide composite sol; (2) performing soaking, namely performing vacuum soaking on a three-dimensional silicon carbide fiber prefabricated part into the aluminum oxide-zirconium oxide composite sol; (3) drying the soaked three-dimensional silicon carbide fiber prefabricated part; (4) performing thermal treatment; (5) repeating the soaking-drying-thermal treatment process of steps (2) to (4) till the weight of a three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material intermittent is increased by less than 1% when being compared with that of a former soaking-drying-thermal treatment process, thereby obtaining the three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxidecomposite material. The three-dimensional silicon carbide fiber reinforced aluminum oxide-zirconium oxide composite material disclosed by the invention has the advantages of being good in high temperature resistance and oxidation resistance, excellent in mechanical property, and the like.

Description

technical field [0001] The invention belongs to the technical field of high-temperature-resistant fiber-reinforced ceramic-based composite materials and their preparation, and in particular relates to a three-dimensional silicon carbide fiber-reinforced alumina-zirconia 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 necessary. [0003] ...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/10C04B35/624
CPCC04B35/10C04B35/624C04B35/803C04B2235/3246C04B2235/6562C04B2235/6567C04B2235/96
Inventor 马青松曾宽宏
Owner NAT UNIV OF DEFENSE TECH
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