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A kind of preparation method of graphene column and carbon nanotube fiber reinforced SiCN composite material

A technology of carbon nanotube fibers and composite materials, which is applied in the field of ceramic composite materials, can solve the problems of low mechanical properties and achieve the effect of improving mechanical properties and reducing porosity

Active Publication Date: 2020-12-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the problem of low mechanical properties of existing continuous fiber reinforced ceramic composite materials, and provides a preparation method of graphene column and carbon nanotube fiber reinforced SiCN composite materials

Method used

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  • A kind of preparation method of graphene column and carbon nanotube fiber reinforced SiCN composite material
  • A kind of preparation method of graphene column and carbon nanotube fiber reinforced SiCN composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The first step, the preparation of three-dimensional graphene column: first place a copper foil with a thickness of 400nm on the SiO 2 on, the copper foil and SiO 2 Placed in the electron beam evaporation equipment, a layer of iron nanoparticles with a thickness of 3nm is evaporated on the surface of the copper foil, iron, copper foil and SiO 2 As the substrate, put the substrate into the chemical vapor deposition equipment, vacuum, and pass Ar (100sccm) and H 2 (80sccm), raise the temperature to 700°C, after the temperature stabilizes, pass into C 2 h 2 (20sccm), keep for 5min, grow three-dimensional graphene columns on the copper foil, and then put the copper foil and three-dimensional graphene columns into FeCl with a concentration of 1mol / L 3 The solution is etched, and then washed with HCl solution and deionized water to obtain a three-dimensional graphene column;

[0034] The second step, the preparation of carbon nanotube fibers: add carbon nanotubes to a fla...

Embodiment 2

[0045] In the first step, a copper foil with a thickness of 500nm is placed on the SiO 2 on, the copper foil and SiO 2 Placed in the electron beam evaporation equipment, a layer of iron nanoparticles with a thickness of 5nm is evaporated on the surface of the copper foil, iron, copper foil and SiO 2 As the substrate, put the substrate into the chemical vapor deposition equipment, vacuum, and pass Ar (100sccm) and H 2 (80sccm), raise the temperature to 750°C, after the temperature stabilizes, pass into C 2 h 2 (20sccm), keep for 15min, grow three-dimensional graphene columns on the copper foil, and then put the copper foil and three-dimensional graphene columns into FeCl with a concentration of 0.8mol / L 3 The solution is etched, and then washed with HCl solution and deionized water to obtain a three-dimensional graphene column;

[0046] In the second step, add carbon nanotubes into a flask containing a mixture of concentrated sulfuric acid and concentrated nitric acid (volu...

Embodiment 3

[0057] In the first step, a copper foil with a thickness of 600nm is placed on the SiO 2 on, the copper foil and SiO 2 Placed in the electron beam evaporation equipment, a layer of iron nanoparticles with a thickness of 10nm is evaporated on the surface of the copper foil, iron, copper foil and SiO 2 As the substrate, put the substrate into the chemical vapor deposition equipment, vacuum, and pass Ar (100sccm) and H 2 (80sccm), raise the temperature to 800°C, after the temperature stabilizes, pass C 2 h 2 (20sccm), keep for 30min, grow three-dimensional graphene columns on the copper foil, and then put the copper foil and three-dimensional graphene columns into FeCl with a concentration of 0.6mol / L 3 The solution is etched, and then washed with HCl solution and deionized water to obtain a three-dimensional graphene column;

[0058] In the second step, add carbon nanotubes into a flask containing a mixture of concentrated sulfuric acid and concentrated nitric acid (volume r...

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Abstract

A method for preparing a graphene column and carbon nano tube fiber reinforced SiCN composite belongs to the technical field of ceramic composites, and can solve the problem that a conventional continuous fiber reinforced ceramic composite is low in mechanical performance. The method is characterized in that graphene column and carbon nano tube fiber reinforced two-dimensional woven fiber cloth ismanufactured by a vacuum filtration method, a polysilazane solution is taken as a precursor, and a precursor infiltration pyrolysis is utilized to prepare the graphene column and carbon nano tube fiber reinforced SiCN composite. The prepared graphene column and carbon nano tube fiber reinforced SiCN composite has the porosity reduced to 5.5% and the tensile strength capable of reaching 276 MPa.

Description

technical field [0001] The invention belongs to the technical field of ceramic composite materials, and in particular relates to a method for preparing SiCN composite materials reinforced by graphene columns and carbon nanotube fibers. Background technique [0002] Continuous fiber-reinforced ceramic composites refer to composite materials with continuous fiber as reinforcement and ceramic as matrix. The introduction of high-performance fibers can strengthen ceramics, prevent cracks, and improve the mechanical properties of ceramics. Fiber-reinforced ceramic composites have excellent properties such as high strength, high temperature resistance and low density, and are widely used in high-tech fields such as aerospace, chemical industry, nuclear fission, and nuclear fusion. The preparation methods of ceramic composite materials mainly include: precursor impregnation cracking method, chemical vapor deposition method and reaction infiltration method. Precursor impregnation a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/584C04B35/80
CPCC04B35/584C04B2235/96C04B2235/77C04B2235/5256C04B2235/5288C04B2235/5248
Inventor 郭章新赵聃李永存王志勇栾云博
Owner TAIYUAN UNIV OF TECH
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