Method for preparing silicon carbide bullet-proof ceramics

A technology of silicon carbide and silicon carbide powder, which is applied in the field of silicon carbide bulletproof ceramics, can solve the problems that the protection coefficient cannot be achieved, and the cost is only one tenth of that of boron carbide ceramics, and achieve high elastic modulus and high hardness , the effect of low density

Active Publication Date: 2011-02-09
XI AN JIAOTONG UNIV +1
View PDF3 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the protection coefficient of boron carbide ceramics is close to 14, its cost is only one-tenth of that of boron carbide bulletproof ceramics.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing silicon carbide bullet-proof ceramics
  • Method for preparing silicon carbide bullet-proof ceramics
  • Method for preparing silicon carbide bullet-proof ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment includes the following steps:

[0021] Step 1: Put 40 parts of silicon carbide powder, 10 parts of nano-carbon black, and 12 parts of phenolic resin into a ball mill for wet mixing by weight, and the particle size of the above-mentioned silicon carbide powder is d 50 10 μm, the purity of silicon carbide is 99%, the nano-carbon black is N330 carbon black, the phenolic resin is 2130 resin, and the solid content is 83%;

[0022] Step 2: After drying the powder mixed in step 1 at room temperature, add 400ml of absolute ethanol per kilogram according to the powder mass, and stir and dry at 40°C until the absolute ethanol in the powder evaporates to Accounting for 3% of the total mass of the mixed powder, then granulate the mixed powder and pass through a 20-mesh sieve to make the particle size uniform;

[0023] Step 3. Select a mold according to the shape of the desired product, evenly distribute the above-mentioned powder in the cavity of the mold, and pres...

Embodiment 2

[0027] This embodiment includes the following steps:

[0028] Step 1: Put 50 parts of silicon carbide powder, 8 parts of nano-carbon black, and 3 parts of phenolic resin into a ball mill for wet mixing by weight. The particle size of the above-mentioned silicon carbide powder is 30 μm, and the purity of silicon carbide is greater than 98%. Carbon black is N330 carbon black, and described phenolic resin is 2130 resin, and solid content is 88%;

[0029] Step 2: After drying the powder mixed in step 1 at room temperature, add 600ml of absolute ethanol per kilogram according to the powder mass, and stir and dry at 80°C until the absolute ethanol in the powder volatilizes to It accounts for 10% of the total mass of the mixed powder, and then the mixed powder is granulated and passed through a 400-mesh sieve to make the particle size uniform;

[0030] Step 3: Select a mold according to the shape of the desired product, evenly distribute the above-mentioned powder in the cavity of t...

Embodiment 3

[0034] This embodiment includes the following steps:

[0035] Step 1: Put 42 parts of silicon carbide powder, 10 parts of nano-carbon black, and 6 parts of phenolic resin into a ball mill for wet mixing by weight. The particle size of the above-mentioned silicon carbide powder is 14 μm, and the purity of silicon carbide is greater than 98%. Carbon black is N330 carbon black, and the phenolic resin is 2130 resin with a solid content of 83% to 88%;

[0036] Step 2: After drying the powder mixed in step 1 at room temperature, add 500ml of absolute ethanol per kilogram according to the powder mass, and stir and dry at 60°C until the absolute ethanol in the powder evaporates to Accounting for 5% of the total mass of the mixed powder, the mixed powder is then granulated and passed through a 180-mesh sieve to make the particle size uniform;

[0037] Step 3: Select a mold according to the shape of the desired product, evenly distribute the above-mentioned powder in the cavity of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing silicon carbide bullet-proof ceramics, which comprises the following steps of: 1, putting silicon carbide powder, nano-carbon black and phenolic resin into a ball grinding mill for wet mixing; 2, drying the uniformly-mixed powder at room temperature, adding 400 to 600 milliliters / kilogram of absolute ethanol, and stirring, drying, pelletizing and sieving; 3, distributing the powder into a die cavity uniformly and compressing under the pressure of between 70 and 150 MPa; 4, drying and curing compacted green bodies; and 5, adding metallic silicon into a cured sample, sintering, heating in the atmosphere of nitrogen, performing heat preservation under vacuum, and cooling with a furnace. In the silicon carbide bullet-proof ceramics prepared by the method, the density is more than 3.05 g / cm<3>, the Vickers hardness is more than 2,000 HV, the bending strength is more than 200 MPa, the elastic modulus is more than 380 GPa, and the protective coefficient is more than or equal to 9.3.

Description

technical field [0001] The invention relates to a method for preparing bulletproof ceramics, in particular to a method for preparing silicon carbide bulletproof ceramics. Background technique [0002] Armor protection materials are the focus of research in the military field of various countries. In the past two decades, ceramic armor materials have the advantages of low density, high hardness, high strength and high modulus, and still have good strength and hardness at high temperatures; therefore, they can effectively resist armor-piercing bullets, Armor-piercing projectiles and some other impact injuries have been widely used in the field of protective materials. Among them, the reaction sintered silicon carbide material has attracted more and more attention because of its good net size performance, relatively simple sintering process, ability to form complex shape products, and anti-ballistic performance comparable to hot-pressed silicon carbide ceramics. [0003] Sili...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/565
Inventor 杨建锋刘荣臻鲍崇高马天谷文炜乔冠军严自力
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap