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Boron carbide-titanium boride lightweight high-strength composite ceramic material and preparation method thereof

A technology of composite ceramics and titanium boride, applied in the field of ceramic materials, can solve the problems of high theoretical bulk density and the inability to adjust the composition of ceramic composite materials, etc.

Active Publication Date: 2021-09-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method makes it impossible to adjust the composition of the ceramic composite material, and the theoretical bulk density of the material is as high as 3.34g / cm3
[0004]At present, there is no effective way to obtain B4 with controllable composition, fine TiB2 grains and excellent comprehensive properties C-TiB2 composite ceramic material

Method used

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  • Boron carbide-titanium boride lightweight high-strength composite ceramic material and preparation method thereof
  • Boron carbide-titanium boride lightweight high-strength composite ceramic material and preparation method thereof
  • Boron carbide-titanium boride lightweight high-strength composite ceramic material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] Example 1, see figure 1 :

[0032] The invention provides a boron carbide-titanium boride lightweight high-strength composite ceramic material and a preparation method thereof, which is prepared from the following components and their mass percentages: boron carbide powder 82.05%, titanium carbide powder 8.20%, amorphous boron powder 9.75%, its preparation method comprises the steps:

[0033] 1) take titanium carbide powder and amorphous boron powder by proportioning;

[0034] 2) The weighed titanium carbide powder and amorphous boron powder are mixed into a slurry by a drum mixer; the mixed slurry is subjected to rotary evaporation, then placed in a vacuum drying oven to dry, and TiC is obtained after sieving -B mixed powder;

[0035] 3) Put the TiC-B mixed powder in a hot-pressed sintering furnace, and obtain the synthesized primary B after heat treatment in the hot-pressed furnace 4 C-TiB 2 Composite powder;

[0036] 4) Weigh primary B according to the ratio 4...

Embodiment 2

[0040] Example 2, see figure 2 :

[0041] The present invention provides a boron carbide-titanium boride lightweight high-strength composite ceramic material and a preparation method thereof, which are basically the same as in Example 1, except that it is prepared from the following components and their mass percentages: boron carbide powder 64.10% , titanium carbide powder 16.40%, amorphous boron powder 19.50% (see the SEM image of the sample figure 2 ).

Embodiment 3

[0042] Example 3, see image 3 :

[0043] The present invention provides a boron carbide-titanium boride lightweight high-strength composite ceramic material and a preparation method thereof, which are basically the same as in Example 1, except that it is prepared from the following components and their mass percentages: boron carbide powder 46.15% , titanium carbide powder 24.55%, amorphous boron powder 29.30% (see the SEM image of the sample image 3 ).

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Abstract

The invention provides a boron carbide-titanium boride lightweight high-strength composite ceramic material and a preparation method thereof. The boron carbide-titanium boride lightweight high-strength composite ceramic material is prepared from, by mass, 28.20-82.05% of boron carbide (B4C) powder, 8.20-32.75% of titanium carbide (TiC) powder and 9.75-39.05% of amorphous boron (B) powder through the following steps: weighing the titanium carbide powder and the amorphous boron powder, mixing the titanium carbide powder and the amorphous boron powder through a roller mixer, carrying out rotary evaporation, drying and sieving to obtain TiC-B mixed powder, placing the TiC-B mixed powder in a hot pressing sintering furnace, carrying out heat treatment to obtain primary B4C-TiB2 composite powder, weighing the primary B4C-TiB2 composite powder and boron carbide powder, carrying out ball-milling mixing on the powder through a planetary ball mill, carrying out rotary evaporation, drying and sieving to obtain B4C-TiB2 composite powder, placing the B4C-TiB2 composite powder in a graphite mold, and carrying out hot pressing sintering in a hot pressing furnace. According to the invention, the product has the advantages of good sinterability, fracture toughness and conductivity, capability of being processed through electric sparks, uniform TiB2 aggregate dispersion, controllable components, high bending strength and the like.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a boron carbide-titanium boride lightweight high-strength composite ceramic material and a preparation method thereof. Background technique [0002] Boron carbide (B 4 C) has excellent comprehensive properties, especially its low density (2.52g / cm 3 ), high hardness (37GPa), high elastic modulus (450GPa), and large neutron absorption cross section (600barns) have attracted widespread attention. Therefore, B 4 C is widely used in light protective materials, wear-resistant parts, knives and nuclear industry and other fields. B 4 The covalent bond character of C makes it have excellent properties, but also leads to lower fracture toughness (2.2MPa·m 1 / 2 ) and extremely poor sintering properties. [0003] A large number of studies have shown that the introduction of second-phase hard particles is an effective way to overcome the above difficulties. Alumina (Al 2 o ...

Claims

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Application Information

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IPC IPC(8): C04B35/563C04B35/56C04B35/622C04B35/645
CPCC04B35/563C04B35/622C04B35/5611C04B35/645C04B2235/3821C04B2235/3843C04B2235/421C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/658C04B2235/77C04B2235/96
Inventor 王为民何强龙田田郭文超
Owner WUHAN UNIV OF TECH
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