Three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material and preparation method thereof

A three-dimensional silicon carbide and silicon carbide fiber technology is applied in the field of three-dimensional silicon carbide fiber reinforced silicon oxide-zirconia composite ceramic composite materials and its preparation, which can solve the problem of less gaseous raw materials and no three-dimensional silicon carbide fiber preforms. The research reports of silicon-zirconia composite ceramic composites, and the problems of unsatisfactory deposition characteristics, etc., can improve the filling degree, improve the ability of the substrate to bear and transmit loads, and improve the impregnation efficiency.

Active Publication Date: 2018-06-12
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And for fiber-reinforced silica-zirconia multiphase ceramic composites, it is currently suitable for depositing SiO 2 and ZrO 2 The gaseous raw material is too little, and the deposition characteristics are not ideal, while the liquid raw materia

Method used

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  • Three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material and preparation method thereof
  • Three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material and preparation method thereof
  • Three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material and preparation method thereof

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Embodiment 1

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

[0043] (1) Sol selection: select SiO with a solid phase content of 40wt% 2 -ZrO 2 Composite sol as SiO 2 -ZrO 2 The raw material of multiphase ceramic matrix, in which SiO 2 with ZrO 2 The molar ratio is 1:1, in the above SiO 2 -ZrO 2 Add HNO to composite sol 3 As a stabilizer, HNO 3 The amount added is SiO 2 30% of the weight of the 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%. Place the selected three-dimensional silicon carbide fiber preform under vacuum, raise t...

Embodiment 2

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

[0054] (1) Sol selection: select SiO with a solid phase content of 30wt% 2 -ZrO 2 Composite sol as SiO 2 -ZrO 2 The raw material of multiphase ceramic matrix, in which SiO 2 with ZrO 2 The molar ratio is 95:5, in the above SiO 2 -ZrO 2 Add HNO to composite sol 3 As a stabilizer, HNO 3 The addition amount is SiO 2 25% of the weight of the sol.

[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...

Embodiment 3

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

[0064] (1) Sol selection: select SiO with a solid phase content of 35wt% 2 -ZrO 2 Composite sol as SiO 2 -ZrO 2 The raw material of multiphase ceramic matrix, in which SiO 2 with ZrO 2 The molar ratio is 5:95, in the above SiO 2 -ZrO 2 Add HNO to composite sol 3 As a stabilizer, HNO 3 The amount added is SiO 2 20% of the weight of the 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 t...

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Abstract

The invention discloses a preparation method of a three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material. The preparation method ofthe three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material comprises the following steps of (1) stabilizing SiO2-ZrO2 composite sol;(2) impregnating three-dimensional silicon carbide fiber prefabricated members into the stabilized SiO2-ZrO2 composite sol; (3) drying the impregnated three-dimensional silicon carbide fiber prefabricated members; (4) performing thermal treatment; (5) repeating the impregnation-drying-thermal treatment process in the steps of (2) to (4) until the weight gain rate of a three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material intermediate in a current impregnation-drying-thermal treatment process relative to a previous impregnation-drying-thermal treatment process is smaller than 1% to obtain the three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material. The prepared three-dimensional silicon carbide fiber-reinforced silicon dioxide-zirconium dioxide multiphase ceramic composite material has the advantages of being high in high-temperature resistance and antioxidant and mechanical performance 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 silica-zirconia composite ceramic composite material and a preparation method thereof. Background technique [0002] Silica-zirconia composite ceramics are SiO 2 and ZrO 2 A solid solution structure compound formed by reaction, with SiO 2 and ZrO 2 It has the advantages of high temperature resistance, oxidation resistance and corrosion resistance. It is an excellent high temperature resistant ceramic material. It has obvious advantages in high temperature catalyst carrier, refractory materials for glass and steelmaking furnaces, and anti-oxidation coating. It has broad application prospects. As a single ceramic, the fracture toughness of silica-zirconia composite ceramics is low, in most cases it is 2-3 MPa m 1 / 2 . It ha...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/488C04B35/80C04B35/622
CPCC04B35/803C04B35/14C04B35/481C04B35/488C04B35/622C04B2235/5244C04B2235/616C04B2235/6562C04B2235/6567C04B2235/96
Inventor 马青松曾宽宏
Owner NAT UNIV OF DEFENSE TECH
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