Preparation method of boron carbide ceramic chips

A technology of boron carbide ceramics and boron carbide, applied in the direction of offensive equipment, protective equipment, armor plate structure, etc., to achieve the effects of enhanced comprehensive anti-ballistic performance, convenient splicing, good dispersion and stability

Inactive Publication Date: 2018-03-27
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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  • Preparation method of boron carbide ceramic chips
  • Preparation method of boron carbide ceramic chips
  • Preparation method of boron carbide ceramic chips

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Preparation of boron carbide ceramic sheet

[0021] 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;

[0022] 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;

[0023] 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;

[0024] Step 4) Granulation: such as figure 1 As shown, a granulator is used, which is a granulator made...

Embodiment 2

[0027] Example 2 Boron carbide-titanium alloy composite armor

[0028] 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.

[0029] 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 preparation method of boron carbide ceramic chips. The method comprises the following steps: (1) preparing 1-2wt% of a graphene solution, adding a dispersing agent, and evenlydispersing in a way of ultrasonic, stirring or ball-milling to obtain a solution containing uniformly dispersed graphene; (2) adding the solution into boron carbide raw material powder, wherein boroncarbide power with average particle size of 3-5mu m is selected as a raw material, 3-4% of graphite powder is added as a sintering additive, and the average particle size of the graphite powder is 1-2mu m; (3) mixing the boron carbide raw material powder with the graphene solution, and carrying out ball-milling to form slurry; (4) granulating and drying to obtain granulated powder; (5) putting the granulated powder into a mould, hot-pressing and sintering.

Description

Technical field [0001] The invention belongs to the field of bulletproof ceramics, and specifically relates to a preparation method of a boron carbide ceramic sheet. 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 effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/563C04B35/626C04B35/622B22D19/08F41H5/04
CPCB22D19/08C04B35/563C04B35/622C04B35/62625C04B2235/425C04B2235/95C04B2235/96F41H5/0421
Inventor 夏伦刚崔毅赵立傅肃嘉方宁象
Owner ZHEJIANG LIGHT TOUGH COMPOSITE MATERIALS
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