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Method for preparing ceramic matrix composite material through SiC nano-wire modified ceramic matrix composite material interface

A composite material and ceramic-based technology, which is applied in the field of preparation of ceramic-based composite materials, can solve problems such as gaps in the research field

Inactive Publication Date: 2016-01-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research field of modifying the interface of ceramic matrix composites with SiC nanowires is still blank.

Method used

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  • Method for preparing ceramic matrix composite material through SiC nano-wire modified ceramic matrix composite material interface
  • Method for preparing ceramic matrix composite material through SiC nano-wire modified ceramic matrix composite material interface
  • Method for preparing ceramic matrix composite material through SiC nano-wire modified ceramic matrix composite material interface

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. The carbon fiber preform was ultrasonically cleaned with absolute ethanol for 30 minutes, and then placed in an oven to dry at 70°C for use.

[0037] 2. Prepare the catalyst solution. Weigh nickel nitrate and anhydrous ethanol to prepare a 0.05mol / L catalyst solution, stir and mix well.

[0038] 3. Vacuum impregnation of the porous carbon fiber preform. Put the porous carbon fiber preform and the catalyst solution into a glass impregnation tank, vacuum -0.10 MPa, vacuum for 5 minutes, 5 minutes later, impregnate the preform into the catalyst solution until the porous carbon fiber preform is completely submerged, and perform vacuum impregnation. After 90 minutes of immersion. Take out the impregnated carbon fiber preform and dry it at a drying temperature of 70°C, and obtain a vacuum impregnated porous carbon fiber preform after drying.

[0039] 4. In-situ deposition of SiC nanowires. The impregnated porous carbon fiber preform is placed in a vertical CVD furnace to depo...

Embodiment 2

[0043] 1. The carbon fiber preform was ultrasonically cleaned with absolute ethanol for 30 minutes, and then placed in an oven to dry at 70°C for use.

[0044] 2. Prepare the catalyst solution. Weigh nickel nitrate and anhydrous ethanol to prepare a 0.05mol / L catalyst solution, stir and mix well.

[0045] 3. Vacuum impregnation of the porous carbon fiber preform. Put the porous carbon fiber preform and the catalyst solution into a glass impregnation tank, vacuum -0.10 MPa, vacuum for 5 minutes, 5 minutes later, impregnate the preform into the catalyst solution until the porous carbon fiber preform is completely submerged, and perform vacuum impregnation. After 90 minutes of immersion. Take out the impregnated carbon fiber preform and dry it at a drying temperature of 70°C, and obtain a vacuum impregnated porous carbon fiber preform after drying.

[0046] 4. In-situ deposition of SiC nanowires. The impregnated porous carbon fiber preform is placed in a vertical chemical vapor depo...

Embodiment 3

[0049] 1. The carbon fiber preform was ultrasonically cleaned with absolute ethanol for 30 minutes, and then placed in an oven to dry at 70°C for use.

[0050] 2. Prepare the catalyst solution. Weigh nickel nitrate and anhydrous ethanol to prepare a 0.05mol / L catalyst solution, stir and mix well.

[0051] 3. Vacuum impregnation of the porous carbon fiber preform. Put the porous carbon fiber preform and the catalyst solution into a glass impregnation tank, vacuum for 5 min to -0.10 MPa, 5 min later, the preform is immersed in the catalyst solution until the porous fiber preform is completely submerged for vacuum impregnation. After 90 minutes of immersion. Take out the impregnated fiber preform and dry it at a drying temperature of 70°C, and obtain a vacuum impregnated porous carbon fiber preform after drying.

[0052] 4. In-situ deposition of SiC nanowires. The impregnated porous carbon fiber preform is placed in a vertical chemical vapor deposition furnace to deposit SiC nanowir...

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Abstract

The present invention relates to a method for preparing a ceramic matrix composite material through a SiC nano-wire modified ceramic matrix composite material interface. The method comprises: immersing a porous fiber preform in a catalyst solution; in a CVD furnace, carrying out in-situ SiC nano-wire deposition by using methyltrichlorosilane MTS as a silicon source, using argon Ar as a dilution gas, and using hydrogen as a carrier gas, wherein the dilution ratio is 30-90; and preparing a SiC matrix by using a CVI process, using methyltrichlorosilane MTS as a silicon source, and using argon Ar as a dilution gas so as to obtain the compact SiC nano-wire modified ceramic matrix composite material, wherein the dilution ratio is 9-11. According to the present invention, the reinforcing and toughening mechanism of the SiC nano-wire is used to improve the mechanical property of the material; and the bending strength of the composite material adopting the SiC nano-wires as the interface is increased by 26.7% (Figure 6) compared with the PyC interface composite material under the same process, and the interface antioxidant property of the interface can be improved.

Description

Technical field [0001] The invention belongs to a preparation method of a ceramic matrix composite material, and specifically relates to a process for catalyzing the growth of SiC nanowires by low pressure chemical vapor infiltration (LPCVI), and using the process to grow SiC nanowire modified fibers and matrix in situ on a carbon fiber preform The interface between the SiC nanowires is a method for preparing ceramic matrix composites from the interface of SiC nanowire modified ceramic matrix composites. Background technique [0002] Continuous fiber toughened ceramic matrix composites have high specific strength, high specific modulus, low density, excellent fracture toughness and excellent high-temperature mechanical properties, making them a research hotspot in the world and gradually applied to the aerospace field. Ideal material for important thermal structural components. In ceramic matrix composites, the interface between the fiber and the matrix plays a role in transferr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/565
Inventor 刘永胜田卓张程煜万佳佳董宁成来飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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