A carbon nanotube and graphene synergistically reinforced alumina-based composite material and preparation method thereof

A technology of carbon nanotubes and composite materials, applied in the field of carbon nanotubes and graphene synergistically reinforced alumina-based composite materials and its preparation, can solve the problems of reducing the densification of the overall ceramics, achieve excellent mechanical properties, reduce wear, and porosity low rate effect

Active Publication Date: 2021-12-24
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the densification of monolithic ceramics is reduced by incorporating enhanced connections in the monolithic ceramics

Method used

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  • A carbon nanotube and graphene synergistically reinforced alumina-based composite material and preparation method thereof
  • A carbon nanotube and graphene synergistically reinforced alumina-based composite material and preparation method thereof
  • A carbon nanotube and graphene synergistically reinforced alumina-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Carbon Nanotube Surface Modification

[0050] Add carbon nanotubes to 10μg / mL gallic acid aqueous solution, and disperse evenly. The ratio of the weight of carbon nanotubes to the volume of gallic acid aqueous solution is 0.1g: 40ml; let it stand for 24h, filter, and take the filter residue at 80°C Vacuum-dried for 2 hours to obtain surface-modified carbon nanotubes.

[0051] By comparing the morphology characteristics of carbon nanotubes treated with surface modification and carbon nanotubes without surface modification, it is found that the surface of modified carbon nanotubes is smooth, the content of impurities is less, and the dispersion is better.

[0052] The carbon nanotubes mentioned in the following examples all refer to the carbon nanotubes obtained after surface modification treatment by the above method.

Embodiment 2

[0054] Graphene Surface Modification

[0055] Add graphene to 0.02μg / mL rutin aqueous solution, and disperse evenly, wherein the ratio of the weight of graphene to the volume of rutin aqueous solution is 0.1g:40ml; let it stand for 24h, filter, take the filter residue and vacuum at 80°C Dry for 2 hours to obtain surface-modified graphene.

[0056] By comparing the morphology characteristics of the surface-modified graphene and the graphene without surface modification, it is found that the surface-modified graphene has a smooth surface, less impurity content, and better dispersion.

[0057] The graphene mentioned in the following examples all refers to the graphene obtained after surface modification treatment by the above-mentioned method.

Embodiment 3

[0059] Carbon nanotube reinforced alumina matrix composite material

[0060] (1) get the surface-modified carbon nanotubes in Example 1; (2) in parts by weight, adopt agate balls and agate ball tanks to prepare 1 part of surface-modified carbon nanotubes and titanium carbide powder 29.445 parts, 0.5 parts of calcium oxide powder, 0.35 parts of yttrium oxide powder, and 68.705 parts of alumina powder were mixed by ball milling, the speed of rotation was 350 rpm, and the ball milling time was 120 min; (3) The composite powder was subjected to discharge plasma sintering, The temperature was raised to 1600°C at 100°C / min, and the holding time was 2h; the pressure of spark plasma sintering was 50MPa, and the holding time was 5min, and then cooled with the furnace to obtain carbon nanotube and graphene synergistically reinforced alumina-based composite materials.

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Abstract

The invention discloses an alumina-based composite material synergistically reinforced by carbon nanotubes and graphene, which belongs to the technical field of composite materials and consists of the following components in terms of mass percentage: 10-40% of titanium carbide and 0.1-2% of calcium oxide. %, 0.1-2% of yttrium oxide, 0.1-5% of surface-modified graphene, 0.1-5% of surface-modified carbon nanotubes, and the balance is aluminum oxide, totaling 100%; the above-mentioned A method for preparing a composite material, wherein the surface-modified graphene is graphene obtained by modifying graphene with a rutin aqueous solution, and the surface-modified carbon nanotubes are obtained by modifying the carbon nanotubes with a gallic acid aqueous solution The obtained carbon nanotubes; the carbon nanotubes and graphene synergistically reinforced alumina-based composite materials obtained in the present invention have a uniform and compact structure, low porosity and high density, so excellent mechanical properties can be obtained; the inventive method does not produce waste gas, Waste slag and other pollutants, the process is simple and easy to produce.

Description

technical field [0001] The invention relates to a carbon nanotube and graphene synergistically reinforced alumina-based composite material and a preparation method thereof. Background technique [0002] The high mechanical and functional properties of alumina ceramic materials make them promising for a wide range of applications. However, pure alumina ceramic materials are brittle and have limited fracture toughness, so they cannot be used in many structural materials. This has led to the development of nanoparticle-reinforced ceramic matrix composites. Nanoparticles are well dispersed in the alumina ceramic matrix, which can improve the mechanical properties of alumina such as fracture toughness, fracture strength, elastic modulus and wear resistance. However, the densification of monolithic ceramics is reduced by incorporating enhanced connections in the monolithic ceramics. Therefore, finding a suitable nano-reinforcement phase is the key to improving the mechanical pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/64
CPCC04B35/10C04B35/622C04B35/64C04B2235/422C04B2235/666C04B2235/3843C04B2235/3225C04B2235/3208
Inventor 蒋小松孙大明张亚丽杨刘高奇孙红亮邵甄胰
Owner SOUTHWEST JIAOTONG UNIV
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