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Boron carbide-graphene micro-laminated composite material and preparation method thereof

A composite material and graphene layer technology, which is used in the preparation of B4C ceramic materials and the field of ceramic materials, can solve problems such as the decline of mechanical properties such as hardness, and achieve the effects of good layer thickness control, improved fracture toughness, and inhibition of crack generation and expansion.

Active Publication Date: 2020-08-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the above literature reports, it is found that with the addition of graphene, the fracture toughness of boron carbide ceramic materials increases, but its mechanical properties such as hardness will decrease accordingly.

Method used

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  • Boron carbide-graphene micro-laminated composite material and preparation method thereof
  • Boron carbide-graphene micro-laminated composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] with sintered B 4 The thickness of layer C is 10 μm as an example.

[0045] The present embodiment provides a kind of preparation method of boron carbide / graphene micro laminated composite material, comprises the following steps:

[0046] 1) prepare 3wt% PVA solution, weigh GO and B according to the addition of GO as 1wt% 4 Add C powder into a beaker filled with 100ml ultrapure water, then weigh B 4 Add C powder into another beaker containing the same volume of PVA solution, and then mechanically stir with a stirrer at 400r / min for 4h to obtain a slurry suitable for film formation, with a solid content of 45%;

[0047] 2) First, use scissors to cut a suitable size PET film and fix it on the flat coater. 4 C film, after it dries, a layer of B with a thickness of 30 μm is formed on it 4 C-1GO film;

[0048] 3) Repeat step 2) until 51 layers of B are obtained 4 C and B 4 Laminated film of C-1GO;

[0049] 4) Put the PET film with a laminated film on the surface on a...

Embodiment 2

[0055] with sintered B 4 The thickness of layer C is 50 μm as an example.

[0056] The present embodiment provides a kind of preparation method of boron carbide / graphene micro laminated composite material, comprises the following steps:

[0057] 1) prepare 3wt% PVA solution, weigh GO and B by weighing GO content as 5wt% 4 Add C powder into a beaker filled with 100ml ultrapure water, then weigh B 4 Add C powder into another beaker containing the same volume of PVA solution, and then use a stirrer to mechanically stir at 400r / min for 4h to obtain a slurry suitable for film formation;

[0058] 2) First, use scissors to cut a PET film of a suitable size and fix it on a flat-bed coating machine. The heating temperature of the flat-bed coating machine is about 40°C, and then a layer of B with a thickness of about 120 μm and uniform distribution is formed on the PET film. 4 C film, after it dries, a layer of B with a thickness of 50 μm is formed on it 4 C-5GO film;

[0059] 3) R...

Embodiment 3

[0067] with sintered B 4 The thickness of layer C is 100 μm as an example.

[0068] The present embodiment provides a kind of preparation method of boron carbide / graphene micro laminated composite material, comprises the following steps:

[0069] 1) Prepare 3wt% PVA solution, weigh GO and B according to GO content of 20wt% 4Add C powder into a beaker filled with 100ml ultrapure water, then weigh B 4 Add C powder into another beaker containing the same volume of PVA solution, and then use a stirrer to mechanically stir at 400r / min for 4h to obtain a slurry suitable for film formation;

[0070] 2) First, use scissors to cut a PET film of a suitable size and fix it on a flat-bed coating machine. 4 C film, after it dries, a layer of B with a thickness of 400 μm is formed on it 4 C-20GO film;

[0071] 3) Repeat step 2) until 11 layers of B are obtained 4 C and B 4 Laminated film of C-20GO;

[0072] 4) Put the PET film with a laminated film on the surface on a horizontal pla...

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Abstract

The invention discloses a preparation method of a boron carbide / graphene micro-laminated composite material. The boron carbide / graphene micro-laminated composite material provided by the invention comprises boron carbide (B4C) layers and boron carbide-graphene layers, wherein the boron carbide (B4C) layers and the boron carbide-graphene layers are alternately arranged, the boron carbide-graphene layers are B4C layers doped with reduced graphene oxide, doped graphene oxide is reduced into rGO through heat treatment, the rGO is introduced, and the doping amount of the rGO is 0.5-10 wt%. According to the invention, the compact boron carbide / graphene micro-laminated composite material is obtained by preparing a pure B4C and rGO enhanced B4C alternating micro-laminated structure and carrying out SPS sintering. Compared with pure B4C ceramic, the boron carbide / graphene micro-laminated composite material prepared by adopting the method has the advantages that fracture toughness can be improved while the high hardness is maintained. The boron carbide / graphene micro-laminated composite material provided by the invention is compact in structure and has an obvious laminated structure, B4C andB4C-graphene layers are uniformly distributed, and the fracture toughness can be improved while high hardness and high strength are maintained.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to B 4 C Ceramic material preparation field. Background technique [0002] due to B 4 C ceramics have the characteristics of light weight, ultra-high hardness and high elastic modulus. They are the best materials for bulletproof vests, bulletproof helmets and bulletproof armor. At present, boron carbide ceramics are widely used in ceramic armor materials. Compared with other bulletproof materials, B 4 C ceramics are lighter and harder, and are especially suitable for armored helicopters, tanks and other aircraft as bulletproof armor materials, which can effectively resist shells. but B 4 C ceramics have limitations such as poor sinterability and machinability, low toughness, etc., which limit the B 4 C application of ceramic materials. In nature, organisms have solved this problem well by constructing cross-scale micro-nano structures, such as the "brick-bridge-mud" hybrid str...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B35/563C04B35/622C04B35/64
CPCC04B35/522C04B35/563C04B35/622C04B35/64C04B2235/616C04B2235/666C04B2235/96
Inventor 张帆高利龚宇澄任琳赵天颢
Owner WUHAN UNIV OF TECH