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Preparation method of bulletproof composite ceramic

A composite ceramic and ceramic technology, which is applied in the field of preparation of bulletproof composite ceramics, can solve problems such as the inability to meet the surface density limit of lightweight protective decks, and the bulletproof plate is too heavy, so as to ensure high quality and consistency, and improve high density. Effect

Inactive Publication Date: 2020-07-17
LIAONING YIFEI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite bulletproof armor uses a CrMo alloy frame, and the bulletproof plate is too heavy to meet the surface density limit of a lightweight protective deck

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 A kind of preparation method of bulletproof composite ceramics, the steps are as follows:

[0023] (1) Preparation of pure ceramic green body: B 4 C. The raw material powder is vacuumized, and then subjected to ultrasonic vibration and cold pressing to obtain a pure ceramic green body;

[0024] The compacted density of gained pure ceramic green body is 1.0g / cm 3 , the thickness is 5mm, the bottom surface is flat, and the upper surface is flat or curved.

[0025] (2) Preparation of composite ceramic green body: Coat the front and back surfaces of the pure ceramic green body with glue, stick the same area of ​​carbon fiber, put it in a vacuum bag, and pump it to vacuum; then press it through hydraulic 100MPa isostatic pressure to form a composite ceramic green body;

[0026] The carbon fiber is made of carbon fiber twill weave; the axial thermal conductivity of the carbon fiber is greater than 30W / m·k, and the modulus of elasticity is greater than 310Gpa; ...

Embodiment 3

[0037] (1) Preparation of pure ceramic green body: 2 kg of B 4 C raw material powder (Saifu Nano) is vacuumized, then ultrasonically oscillated, cold pressed, and formed into a pure ceramic green body;

[0038] (2) Preparation of composite ceramic green body: Coat the front and back surfaces of the pure ceramic green body with glue, stick the same area of ​​carbon fiber, put it in a vacuum bag, and evacuate it to a vacuum; Forming a composite ceramic green body;

[0039] (3) Vacuum hot pressing sintering: composite ceramic green body, under the conditions of temperature 1800~2200 ℃, pressure 30~60MPa, vacuum hot pressing sintering for 10~30min, to obtain 9 mm thick composite bulletproof ceramics.

[0040] After testing, the Vickers hardness of the composite bulletproof ceramic is 38GPa, the bending strength is 600MPa, and the fracture toughness is 5.9MPa m 1 / 2 , density 2.47g / cm 3 , relative density (density) 99.7%TD;

[0041] The above ceramic bulletproof ceramics (9mm ...

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Abstract

The invention relates to a preparation method of bulletproof composite ceramic, and belongs to the technical field of ceramic matrix composite materials. The bulletproof composite ceramic is obtainedthrough preparation of a pure ceramic green body, preparation of a composite ceramic green body and vacuum hot-pressing sintering. The high-toughness carbon fiber and the ceramic body are subjected tohot pressed sintering, so that the hardness and the toughness of the bulletproof ceramic are greatly improved, and the capability of resisting multiple strikes of armor-piercing bombs and armor-piercing incendiary bombs is achieved.

Description

technical field [0001] The invention relates to a method for preparing bulletproof composite ceramics, belonging to the technical field of ceramic matrix composite materials. Background technique [0002] The excellent properties of boron carbide make it more and more used in various industries. For example, a Chinese invention patent application with application number CN200910180582.5 discloses a composite ceramic, which increases the hardness of boron carbide ceramics by compounding boron carbide with carbon fibers; although the hardness of boron carbide ceramics is improved by compounding with other materials , but it is still difficult to achieve the bulletproof effect. [0003] The Chinese invention patent application with application number 200510086629.3 discloses a preparation method of steel honeycomb ceramic sandwich composite bulletproof armor. The method uses bulletproof steel plates to prepare honeycomb, fills ceramic chips, and glues and brazes to form compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/563C04B41/87
CPCC04B35/563C04B35/622C04B41/009C04B41/5001C04B41/87C04B2235/608C04B2235/77C04B2235/96C04B41/0072
Inventor 伊恒彬田鑫周龙董明
Owner LIAONING YIFEI TECH
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