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A kind of preparation method of aluminum-boron carbide composite material

A composite material and boron carbide technology, which is applied in the field of preparation of aluminum-boron carbide composite materials, can solve the problems of poor thermal stress resistance, easy agglomeration of boron carbide particles, and poor mechanical shock resistance, etc., to improve impact strength , increase the number of earthquake resistance, improve the effect of density

Active Publication Date: 2022-02-25
SHANDONG JINHONG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN103572087B discloses boron carbide particle reinforced aluminum matrix composite material and its preparation method. The composite material uses aluminum alloy as matrix, the mass fraction of boron carbide used as reinforcing phase is 2.5-30%, and boron carbide particles are evenly distributed in the matrix ; The specific preparation method is to mix boron carbide powder and aluminum alloy powder, and through surface activation, plasma activation sintering and heat treatment, to prepare a nearly fully dense sintered sample; the deficiency of this patent: through surface activation of boron carbide Particles tend to agglomerate during sintering
[0005] Patent CN105483487B discloses a zirconium-containing boron carbide-aluminum alloy composite material and its preparation method. The zirconium-containing boron carbide-aluminum alloy composite material designed in this invention is composed of a boron carbide matrix and a zirconium-containing aluminum alloy. By using powder The sintering method prepares the porous boron carbide matrix, and then infiltrates the molten zirconium-containing aluminum alloy into the porous boron carbide matrix to form a dense composite material; the deficiency of this patent: the prepared zirconium-containing boron carbide-aluminum alloy composite material is resistant to mechanical impact Poor performance, poor thermal conductivity, poor resistance to thermal stress changes

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  • A kind of preparation method of aluminum-boron carbide composite material
  • A kind of preparation method of aluminum-boron carbide composite material
  • A kind of preparation method of aluminum-boron carbide composite material

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Embodiment 1

[0030] A method for preparing an aluminum-boron carbide composite material, specifically:

[0031] 1. Preparation of mixed powder: Mix boron carbide powder, silicon carbide powder, alumina powder, and silica powder evenly, and then place them in a centrifugal nano-grinder for nano-dispersion grinding for 2 hours to obtain a particle size of 40nm. The primary mixed powder; then the primary mixed powder is placed in a corona treatment machine for surface corona treatment, the voltage in the corona treatment machine is 150kV; the corona treatment time is 20min, and the corona treatment is completed to obtain the mixed powder.

[0032] Among them, the mass ratio of boron carbide powder, silicon carbide powder, alumina powder and silicon dioxide powder is 40:8:5:2.

[0033] The purity of the boron carbide powder is 98.5%.

[0034] The purity of the silicon carbide powder is 98%.

[0035] 2. Preparation of slurry: put mixed powder, alcohol-soluble phenolic resin, polydiallyl dimet...

Embodiment 2

[0047] A method for preparing an aluminum-boron carbide composite material, specifically:

[0048] 1. Preparation of mixed powder: Mix boron carbide powder, silicon carbide powder, alumina powder, and silica powder evenly, then place them in a centrifugal nano-grinder for nano-dispersion grinding for 2.5 hours, and obtain a particle size of 50nm The primary mixed powder; then the primary mixed powder is placed in the corona treatment machine for surface corona treatment, the voltage in the corona treatment machine is 160kV; the corona treatment time is 25min, and the corona treatment is completed to obtain the mixed powder.

[0049] Among them, the mass ratio of boron carbide powder, silicon carbide powder, alumina powder and silicon dioxide powder is 42:9:7:2.

[0050] The purity of the boron carbide powder is 99%.

[0051] The purity of the silicon carbide powder is 98.5%.

[0052] 2. Prepare the slurry: put the mixed powder, alcohol-soluble phenolic resin, polydiallyl dim...

Embodiment 3

[0064] A method for preparing an aluminum-boron carbide composite material, specifically:

[0065] 1. Preparation of mixed powder: Mix boron carbide powder, silicon carbide powder, alumina powder, and silica powder evenly, then place them in a centrifugal nano-grinder for nano-dispersion grinding for 3 hours, and obtain a particle size of 60nm The primary mixed powder; then the primary mixed powder is placed in a corona treatment machine for surface corona treatment, the voltage in the corona treatment machine is 180kV; the corona treatment time is 30min, and the corona treatment is completed to obtain the mixed powder.

[0066] Among them, the mass ratio of boron carbide powder, silicon carbide powder, alumina powder and silicon dioxide powder is 45:10:8:3.

[0067] The purity of the boron carbide powder is 99.5%.

[0068] The purity of the silicon carbide powder is 99%.

[0069] 2. Prepare the slurry: put the mixed powder, alcohol-soluble phenolic resin, polydiallyl dimeth...

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Abstract

The invention discloses a method for preparing an aluminum-boron carbide composite material, which belongs to the technical field of ceramic preparation. The preparation method includes preparing mixed powder, preparing slurry, drying the slurry, pressing, sintering, modifying boron carbide ceramics, and preparing aluminum-boron carbide. Boron carbide composite material; the invention can reduce the internal defects of the aluminum-boron carbide composite material in the composite process and improve the mechanical strength while improving the mechanical shock resistance, thermal conductivity, and thermal stress change resistance.

Description

technical field [0001] The invention relates to the technical field of ceramic preparation, in particular to a method for preparing an aluminum-boron carbide composite material. Background technique [0002] Boron carbide ceramics is a special ceramic with excellent properties, such as high melting point, high hardness, low density, good wear resistance, strong acid and alkali resistance, etc., but due to its high sintering temperature, it is difficult to densify and low toughness And other shortcomings, which limit its wide application in industry. [0003] In recent years, the research on aluminum-boron carbide composite materials has been extensive, because aluminum raw materials are widely available and cheap, and the material composited with boron carbide has the characteristics of light weight, high strength, and high toughness, and it can also solve the problem of boron carbide ceramics sintering temperature. Too high, difficult to densify and low toughness. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/563C04B35/622
CPCC04B35/563C04B35/622C04B2235/3826C04B2235/3217C04B2235/3418C04B2235/402
Inventor 王汝江于海培董世昌张东东
Owner SHANDONG JINHONG NEW MATERIAL CO LTD