Boron carbide ceramic plate

A technology of boron carbide ceramics and ceramics, which is applied to the structure of armor plates, offensive equipment, protective equipment, etc., to achieve the effect of improving anti-multiple elastic performance, good dispersion and stability, and firm restraint

Inactive Publication Date: 2018-04-24
ZHEJIANG LIGHT TOUGH COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of large-scale ceramic armor is still facing great difficulties

Method used

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  • Boron carbide ceramic plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Preparation of boron carbide ceramic sheet

[0018] Step 1) Raw material powder: select boron carbide powder with an average particle size of 3-5 um as raw material, add 3%-4% graphite powder as a sintering aid, and the average particle size of graphite powder is 1-2 um;

[0019] Step 2) Prepare graphene solution: prepare 1-2 wt% graphene aqueous solution or alcohol solution, add N-methylpyrrolidone as dispersant, and ultrasonically disperse for 10-20 h to obtain a uniformly dispersed solution of graphene; where graphene The sheet diameter>1um, the number of layers <10 layers, the added amount of graphene accounts for 1-5 wt% of the boron carbide powder;

[0020] Step 3) Add the powder obtained in step 1) and the graphene solution obtained in step 2) into a ball mill for 8-10 hours, the speed of the ball mill is 30-50 rpm, and the ratio of ball to material is 2:1;

[0021] Step 4) Granulation: such as figure 1 As shown, a granulator is used, which is a granulator made...

Embodiment 2

[0024] Example 2 Boron carbide-titanium alloy composite armor

[0025] Step 1) According to the preparation method of embodiment 1, and the graphite mold in step 5) of embodiment 1 is hexagonal, such as figure 2 As shown, a regular hexagonal ceramic sheet is obtained, and the ceramic sheets 8 are spliced ​​together to form a ceramic plate 11.

[0026] Step 2) First, prefabricate a mold with a certain shape according to the size of the boron carbide ceramic plate 11, place the ceramic plate 11 to be poured in the mold, preheat it in an oven at 400°C for 1 hour, and take it out and place it in a casting tank. Then the smelting furnace is heated to a certain temperature. After the titanium alloy is completely melted, it is cast around the ceramic block. After the molten titanium alloy is solidified, the metal-to-ceramic material is encapsulated to form an overall structure of titanium alloy wrapped boron carbide ceramic. The amount of titanium alloy is calculated according to the pou...

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Abstract

The invention provides a boron carbide ceramic plate which is formed by splicing ceramic chips. Graphene highly dispersed in the ceramic chips has excellent electroconductive, heat-conducting and mechanical performance and is a two-dimensional material, so that mutual attraction among graphene layers can be remarkably lowered through surface modification to avoid aggregation; graphene has high dispersity and stability in some liquid media, so that a graphene solution stable in dispersion can be prepared; a graphene-ceramic mixed raw material having good implanting effect can be obtained by mixing graphene with ceramic matrix size; graphene plays a role in strengthening and toughening through mechanisms of ceramic interface pinning, crack deflection inducing, bifurcating and crack bridging,graphene breaking and extracting and energy absorbing.

Description

Technical field [0001] The invention belongs to the field of bulletproof ceramics, and specifically relates to a boron carbide ceramic plate. Background technique [0002] With the rapid development of science and technology, the threats facing the battlefield are getting bigger and bigger, making the bulletproof armor materials increasingly develop in the direction of high hardness, high strength, high toughness and low density. Due to the high density of traditional metal bulletproof materials, vehicles, ships and aircrafts have to sacrifice their payloads. At the same time, too thick armor reduces the operational flexibility of the equipment. Therefore, lightweight bulletproof materials have become the current research hotspot and development trend. . Ceramic materials have excellent properties such as high strength, high hardness, high temperature resistance, oxidation resistance, and low density, as well as energy absorption, wear, and dynamic effects that are beneficial to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/563C04B35/626C04B35/645B22D19/08F41H5/04
CPCC04B35/563B22D19/08C04B35/62615C04B35/6264C04B35/62695C04B35/645C04B2235/425C04B2235/95C04B2235/96F41H5/0421
Inventor 夏伦刚崔毅赵立傅肃嘉方宁象
Owner ZHEJIANG LIGHT TOUGH COMPOSITE MATERIALS
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