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Preparation method and application of carbon nano tube modified carbon fiber enhanced SiBCN ceramic composite material

A technology of carbon nanotube modification and ceramic composite materials, which is applied in the field of preparation of SiBCN ceramic composite materials, can solve problems such as poor mechanical properties, achieve excellent high temperature resistance and mechanical properties, increase the bonding interface, and improve the interface bonding force Effect

Inactive Publication Date: 2016-01-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of poor mechanical properties between carbon fiber and SiBCN ceramics in existing carbon fiber and SiBCN ceramic composite materials, and provides a preparation method and application of carbon nanotube modified carbon fiber reinforced SiBCN ceramic composite materials

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  • Preparation method and application of carbon nano tube modified carbon fiber enhanced SiBCN ceramic composite material
  • Preparation method and application of carbon nano tube modified carbon fiber enhanced SiBCN ceramic composite material
  • Preparation method and application of carbon nano tube modified carbon fiber enhanced SiBCN ceramic composite material

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specific Embodiment approach 1

[0029] Specific embodiment one: the preparation method of carbon nanotube modified carbon fiber reinforced SiBCN ceramic composite material of this embodiment, carry out according to the following steps:

[0030] 1. Oxidize the surface of the carbon fiber to obtain oxidized carbon fiber;

[0031] 2. Attachment of the catalyst on the carbon fiber surface: Weigh the metal salt, prepare a 0.01-0.2mol / L metal salt acetone solution, immerse the oxidized carbon fiber obtained in step 1 into the metal salt acetone solution, and soak at room temperature for 10-15 hours , take out the soaked carbon fiber, put it in 50~60℃ and dry it for 12~14h;

[0032] 3. Preparation of carbon nanotube modified carbon fiber reinforcement: carbon nanotubes are grown on the surface of carbon fiber with catalyst attached by plasma-enhanced chemical vapor deposition. Vacuum until the pressure in the furnace chamber is 0 Pa, and feed H at a flow rate of 20 sccm 2 , control the pressure in the furnace to ...

specific Embodiment approach 2

[0035] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the specific method for oxidizing the surface of the carbon fiber in step 1 is: completely immerse the carbon fiber in acetone, and heat it at a temperature of 70-80°C. Reflux for 22-26 hours, dry at a temperature of 50-60°C for 12-14 hours to obtain dried carbon fibers, completely immerse the dried carbon fibers in concentrated nitric acid, soak at room temperature for 5-10 hours, take them out from the concentrated nitric acid, The carbon fibers are washed with deionized water until neutral, and dried at a temperature of 50-60° C. for 12-14 hours to obtain oxidized carbon fibers. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0036] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass fraction of concentrated nitric acid in step 1 is 65% to 75%. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to preparation methods and application of SiBCN ceramic composition materials, in particular to a preparation method and application of a carbon nano tube modified carbon fiber enhanced SiBCN ceramic composite material. The problem that an existing carbon fiber and SiBCN ceramic composite material is poor in mechanical property between carbon fiber and SiBCN ceramic is solved. The method comprises the steps that 1, the surface of the carbon fiber is oxidized to obtain oxidized carbon fiber; 2, a catalyst is attached to the surface of the carbon fiber; 3, a carbon nano tube modified carbon fiber enhanced body is prepared; 4, a carbon nano tube modified carbon fiber enhanced SiBCN ceramic precursor is prepared; 5, the carbon nano tube modified carbon fiber enhanced SiBCN ceramic composite material is prepared. The shearing strength of the obtained composite material can reach 61.99-68.01 MPa, and the obtained composite material is used for the field of ceramic materials.

Description

technical field [0001] The invention relates to a preparation method and application of a SiBCN ceramic composite material. Background technique [0002] Modern ceramic materials have been widely used in high-tech fields such as advanced aerospace structural components, high-temperature engines, turbines, atomic reactor walls, and high-temperature sensors due to their excellent properties such as high strength, high temperature resistance, corrosion resistance, oxidation resistance, and low density. . SiBCN multi-system ceramics and SiC, Si 3 N 4 Compared with binary system ceramics such as , BN and ternary system ceramics such as SiCN and SiCO, it has more excellent high temperature resistance and oxidation resistance, and is a new type of ceramic material that is favored. However, when SiBCN multi-component ceramics are used to prepare ultra-high-temperature structures such as large-area windward areas, terminals, and wing leading edges of hypersonic vehicles, their mec...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/515C04B35/622
Inventor 张幸红闫利文胡平洪长青韩文波赵广东
Owner HARBIN INST OF TECH
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