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Preparation method of boron carbide composite ceramic plate and bulletproof flashboard

A technology of composite ceramic plates and bulletproof inserts, applied in the structure of armor plates, protective equipment, offensive equipment, etc., can solve the problems of low fracture toughness, high price, high brittleness, etc., achieve uniform distribution, reduce consumption, and improve fracture The effect of toughness

Active Publication Date: 2021-01-05
香河星通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of boron carbide ceramics are high price (about 10 times that of alumina), high brittleness, and low fracture toughness, which limit its application as a bulletproof ceramic in the form of a whole plate in the field of bulletproof armor and bulletproof inserts.

Method used

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  • Preparation method of boron carbide composite ceramic plate and bulletproof flashboard
  • Preparation method of boron carbide composite ceramic plate and bulletproof flashboard
  • Preparation method of boron carbide composite ceramic plate and bulletproof flashboard

Examples

Experimental program
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Embodiment 1

[0034] The present embodiment relates to a method for preparing a boron carbide composite ceramic plate, which includes the following steps:

[0035] S1: Material selection: use boron carbide powder with D50<3um as raw material, and graphene material as sintering aid;

[0036] S2: Prepare a graphene suspension: Dissolve the dispersing aid in water or alcohol to make a solution, then add graphene to the solution, and disperse it by a high-pressure homogenization process for 1-24 hours to obtain graphene with uniform dispersion of graphene suspension; wherein, the mass ratio of graphene in the dispersion is between 1% and 10%, the graphene sheet diameter D90 in the prepared graphene suspension is less than 1 μm, and the number of layers is less than 10 layers;

[0037] S3: the boron carbide powder obtained in step S1 and the graphene suspension obtained in step S2 are added in a three-roll mill and mixed, wherein the rollers of the slow roller, the medium speed roller and the fa...

Embodiment 2

[0043] This embodiment relates to a bulletproof insert, which sequentially includes a waterproof layer, a crack arresting layer, a bulletproof layer, a transition layer, a titanium alloy bulletproof layer and a buffer layer along the direction of the bullet. A multi-curved plate made of the boron carbide composite ceramic plate described in Example 1. Wherein, the waterproof layer adopts 0.5mm thick polyurea nanocoating or Oxford waterproof cloth.

[0044] As a further improvement of this embodiment, the crack arresting layer adopts aramid woven fabric.

[0045] As a further improvement scheme of this embodiment, the transition layer adopts aramid woven fabric.

[0046] As a further improvement solution of this embodiment, the buffer layer adopts a PE board.

[0047] As a further improvement scheme of this embodiment, the material of the bulletproof layer of the titanium alloy plate is Ti5322 or TC4 alloy.

[0048] As a further improvement of this embodiment, the thickness ...

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Abstract

The invention provides a preparation method of a boron carbide composite ceramic plate and a boron carbide titanium alloy composite bulletproof flashboard. The preparation method of the boron carbidecomposite ceramic plate comprises the steps of selecting boron carbide powder as a raw material, selecting a graphene material as a sintering aid, dispersing the graphene material by adopting a high-pressure homogenization process, then adding the boron carbide powder and the graphene suspension into a three-roll grinder for mixing, conducting granulating and drying to obtain granulated powder, filling the granulated powder into the graphite mold with a prefabricated shape, carrying out two-stage heating in a vacuum environment, introducing nitrogen while carrying out second-stage heating, carrying out heat preservation, quickly cooling to 2200 DEG C, and carrying out heat preservation for 1-1.5 hours. According to the preparation method of the boron carbide composite ceramic plate, sintering densification of boron carbide ceramic can be effectively promoted, overlarge growth of boron carbide ceramic grains can be avoided on the microcosmic level, and the fracture toughness of the boron carbide ceramic plate can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of bulletproof ceramics, in particular to a preparation method of a boron carbide composite ceramic plate. The present invention also relates to a bulletproof insert plate using the composite ceramic plate prepared by the preparation method of the boron carbide composite ceramic plate. Background technique [0002] Ceramic materials absorb energy through a micro-fragmentation process. The ability of ceramics to absorb energy is related to the hardness and elastic modulus of ceramics. The high fracture toughness of the ceramic can delay the fracture time of the projectile hitting the ceramic, improve the fracture energy consumption and anti-elastic resistance of the ceramic, and enhance the abrasive and ploughing effect of the ceramic on the projectile, thereby consuming more projectile kinetic energy and improving the elasticity of the ceramic. can. [0003] The density of boron carbide is the lowest amon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/563C04B35/622C04B35/626F41H5/04
CPCC04B35/563C04B35/622C04B35/6264C04B35/6261C04B35/62695F41H5/0428C04B2235/425C04B2235/96
Inventor 高德谦
Owner 香河星通科技有限公司
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