Boron carbide-silicon carbide complex ceramic and preparation method thereof

A technology of boron carbide silicon carbide and multiphase ceramics, which is applied in the field of ceramic materials, can solve problems such as poor wettability of aluminum melt, hindered development, and difficult solutions, and achieve excellent mechanical properties, increase strength and toughness, and good infiltration sexual effect

Active Publication Date: 2013-05-01
ZHEJIANG LIGHT TOUGH COMPOSITE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another way to develop and apply boron carbide is to obtain boron carbide / aluminum composite material from aluminum melt-infiltrated boron carbide powder preform. However, due to the poor wettability of aluminum melt, aluminum is easy to react with boron carbide to produce brittle phase aluminum carbide. The difficulty of solving the problem is relatively large, which hinders the development of this technology

Method used

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  • Boron carbide-silicon carbide complex ceramic and preparation method thereof
  • Boron carbide-silicon carbide complex ceramic and preparation method thereof
  • Boron carbide-silicon carbide complex ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The raw materials of the prefabricated body are as follows (by weight percentage):

[0053] Boron carbide powder with a particle size of 50-100 microns 75% Boron carbide powder with a particle size of 2-10 microns 15%

[0054] Graphite powder 3.0% Activated carbon powder 4.0%

[0055] Phenolic resin 1.5% Tetramethylammonium hydroxide 0.5%

[0056] Motor oil 0.3% glycerin 0.7%;

[0057] The weight percent of the above-mentioned boron carbide powder is based on pure boron carbide.

[0058] Alloy composition: 80% silicon, 20% aluminum.

Embodiment 2

[0060] The raw materials of the prefabricated body are as follows (by weight percentage):

[0061] Boron carbide powder with a particle size of 50-100 microns 75% Boron carbide powder with a particle size of 2-10 microns 15%

[0062] Graphite powder 3.0% Activated carbon powder 4.0%

[0063] Phenolic resin 1.5% Tetramethylammonium hydroxide 0.5%

[0064] Motor oil 0.3% glycerin 0.7%;

[0065] The weight percent of the above-mentioned boron carbide powder is based on pure boron carbide.

[0066] Alloy composition: 55% silicon, 45% aluminum.

Embodiment 3

[0068] The raw materials of the prefabricated body are as follows (by weight percentage):

[0069] Boron carbide powder with a particle size of 50-100 microns 75% Boron carbide powder with a particle size of 2-10 microns 15%

[0070] Graphite powder 3.0% Activated carbon powder 4.0%

[0071] Phenolic resin 1.5% Tetramethylammonium hydroxide 0.5%

[0072] Motor oil 0.3% glycerin 0.7%;

[0073] The weight percent of the above-mentioned boron carbide powder is based on pure boron carbide.

[0074] Alloy composition: 36% silicon, 64% aluminum.

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Abstract

The invention relates to the field of ceramic materials, in particular to a boron carbide silicon carbide composite ceramic and a preparation method thereof. A boron carbide-silicon carbide composite ceramic, the boron carbide-silicon carbide composite ceramic is formed by degreasing a boron carbide-carbon mixed powder preform and sintering through an alloy infiltration reaction; the boron carbide-carbon mixed powder is calculated by weight percentage The body preform includes 85% to 98% of boron carbide, 1.0% to 14.0% of carbon and the amount of organic linking agent used in prefabricated molding; the alloy described in terms of weight percentage is composed of 12.5% ​​to 95% of silicon, 5% to 87.5% of aluminum %constitute. The invention adopts the technology of infiltration reaction sintering, and can form a double-interconnected microstructure, so that the product has high mechanical properties and can resist bullet shooting. The composite ceramic has a low density and is the most ideal bulletproof and armor material. , mainly used in low-density high-performance materials in the field of bulletproof and armor.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a boron carbide silicon carbide composite ceramic and a preparation method thereof. Background technique [0002] Boron carbide (B 4 C) is an unfixed stoichiometric covalent bond compound with an open polymorphic crystal structure. Its specific gravity is light, its strength is high, its hardness is second only to diamond and cubic boron nitride, its melting point is high, and its neutron absorption is strong. The above characteristics make boron carbide ceramics a potentially important structural candidate material, especially suitable for light armor and nuclear reactor shielding materials. [0003] Boron carbide is a material with excellent performance, but because of its covalent bond structure, its self-diffusion coefficient is small, and sintering is extremely difficult. Most traditional boron carbide ceramics are obtained by hot pressing, hot isostatic pressing and conv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/563C04B35/622
Inventor 方宁象高明霞潘颐张国军巫红燕周红良
Owner ZHEJIANG LIGHT TOUGH COMPOSITE MATERIALS
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