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Fiber-reinforced ceramic matrix composite and preparation method for graphene/carbon nano-tube interface

A carbon nanotube and fiber-reinforced technology, which is applied in the field of connection involving a CVI process, can solve the problems of long interface phase period and poor dispersion, and achieve the effect of improving mechanical properties, good dispersion and short time

Active Publication Date: 2016-06-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a fiber-reinforced ceramic matrix composite material and a preparation method of a graphene / carbon nanotube interface, and fully utilizes the advantages of carbon nanotubes and graphene in improving the mechanical properties of ceramic matrix composite materials , to avoid the shortcomings of poor dispersion of CNT and graphene in the ceramic matrix phase of the traditional process and the long period of the interfacial phase prepared by chemical vapor deposition

Method used

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  • Fiber-reinforced ceramic matrix composite and preparation method for graphene/carbon nano-tube interface
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  • Fiber-reinforced ceramic matrix composite and preparation method for graphene/carbon nano-tube interface

Examples

Experimental program
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Effect test

Embodiment 1

[0046] (1) Disperse 0.5 g of carbon nanotubes in 1000 ml of deionized water, add 0.1 g of carbon nanotube aqueous solution dispersant, and then ultrasonically disperse for 30 min with an ultrasonic material emulsifying disperser to obtain a 0.5 mg / ml CNT aqueous solution.

[0047] (2) Disperse 0.5 g of graphene oxide into 500 ml of deionized water, disperse for 5 h with an ultrasonic cleaner, and prepare a 1 mg / ml graphene solution.

[0048] (3) Immerse the carbon fiber cloth in the CNT solution of step (1), electrophoretically deposit the CNT for 15 minutes, take it out and dry it; then immerse the carbon fiber in the graphene solution of the step (2), electroreduce the deposited graphene for 15 minutes, take it out and dry it ; Obtain carbon fiber cloth with CNT / GO interface

[0049] (4) Laminate 20 sheets of carbon fiber cloth prepared in step (3), clamp and shape them with two porous graphite plates, and sew the template and the laminated carbon cloth in the middle by the ...

Embodiment 2

[0054] (1) Disperse 0.5 g of carbon nanotubes in 1000 ml of deionized water, add 0.1 g of carbon nanotube aqueous solution dispersant, and then ultrasonically disperse for 30 min with an ultrasonic material emulsifying disperser to obtain a 0.5 mg / ml CNT aqueous solution.

[0055] (2) Disperse 0.5 g of graphene oxide into 500 ml of deionized water, disperse for 5 h with an ultrasonic cleaner, and prepare a 1 mg / ml graphene solution.

[0056] (3) Immerse carbon fiber in the graphene solution of step (2), electroreductively deposit graphene for 15 minutes, take out and dry; then immerse carbon fiber cloth in the CNT solution of step (1), deposit CNT by electrophoresis for 15min, take out and dry; Carbon fiber cloth impregnated with GO / CNT interface was obtained.

[0057] (4) Laminate 20 sheets of carbon fiber cloth prepared in step (3), clamp and shape them with two porous graphite plates, and sew the template and the laminated carbon cloth in the middle by the relay-type acupun...

Embodiment 3

[0062] (1) Disperse 0.5 g of carbon nanotubes in 1000 ml of deionized water, add 0.1 g of carbon nanotube aqueous solution dispersant, and then ultrasonically disperse for 30 min with an ultrasonic material emulsifying disperser to obtain a 0.5 mg / ml CNT aqueous solution.

[0063] (2) Disperse 0.5 g of graphene oxide into 500 ml of deionized water, disperse for 5 h with an ultrasonic cleaner, and prepare a 1 mg / ml graphene solution.

[0064] (3) Mix the solution configured in step (1) with step (2) to obtain a CNT / GO mixed solution.

[0065] (4) Immerse the 1K carbon fiber bundles in the CNT / GO mixed solution in step (3), electrify for 30 minutes, take them out and dry them in the air to obtain carbon fiber bundles with CNT / GO interfaces deposited.

[0066] (5) On the 1K carbon fiber bundle obtained in step (4), a CVI process is used to deposit a SiC substrate. The process conditions are as follows: trichloromethylsilane is the precursor gas, argon is the dilution gas (flow ra...

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Abstract

The invention relates to a fiber-reinforced ceramic matrix composite and preparation method for a graphene / carbon nano-tube interface.The composite is structurally characterized in that a carbon fiber is wrapped by a carbon nano-tube, the carbon nano-tube is wrapped by graphene, and a Sic base body is arranged on the outermost layer.The deposit rate of the carbon nano-tube, the graphene and the Sic base body is regulated by regulating the solution concentration and deposition time, and the sequence and the number of layers of a 'carbon nano-tube / graphene' interface layer are designed by changing the deposition sequence and the number of deposition times.The introduced carbon nano-tube and graphene are good in dispersibility, the mass fraction is adjustable within a large scope, and the interface can be designed.An interface phase with the strength reasonable can be designed, and the effect of a fiber-reinforced body can be given to full play; secondary toughening can be conducted on the composite through CNT and the layered graphene, the pulling-out and bridging effects as well as the effect of deflecting cracks of the fiber, the CNT and the graphene can be given to full play, and mechanical properties of the composite are effectively improved.By means of the method, interface layer preparation time is short, efficiency is high, and design can be regulated.

Description

technical field [0001] The invention relates to a method for preparing a fiber-reinforced ceramic matrix composite material at the interface of graphene / carbon nanotubes. The interface is designed to prepare fiber-reinforced ceramic matrix composites by electroreduction deposition of graphene oxide (GO) and electrophoretic deposition of carbon nanotubes (CNT). The method of the material, especially relates to a preparation method of the continuous carbon fiber reinforced silicon carbide ceramic matrix composite material (C / SiC) GO / CNT interface under the CVI process. Background technique [0002] Continuous fiber reinforced silicon carbide ceramic matrix composites (CMC) have excellent properties such as low density, high specific strength, high specific modulus, high temperature resistance, corrosion resistance, and wear resistance. Different from traditional ceramics, it has the characteristics of metal-like fracture behavior, insensitivity to cracks, and no catastrophic d...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/622C04B35/565
CPCC04B35/565C04B35/622C04B35/80C04B2235/422C04B2235/425C04B2235/5248C04B2235/5454C04B2235/614
Inventor 梅辉肖珊珊韩道洋成来飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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