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A fine-grained boron-rich boron carbide-based composite ceramic material and its preparation method

A technology of composite ceramics and ceramic materials, which is applied in the field of fine-grain boron-rich boron carbide-based composite ceramic materials and its preparation, can solve the problems of difficult to obtain nanostructured composite materials, coarse structure of composite materials, and poor material performance. To achieve the effect of optimizing the interface structure, uniform structure and good comprehensive performance

Active Publication Date: 2021-08-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is difficult to obtain a composite material with a nanostructure, the structure of the composite material is coarse, the distribution is uneven, and the performance of the final material is not good.

Method used

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  • A fine-grained boron-rich boron carbide-based composite ceramic material and its preparation method
  • A fine-grained boron-rich boron carbide-based composite ceramic material and its preparation method
  • A fine-grained boron-rich boron carbide-based composite ceramic material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of boron-rich boron carbide-titanium boride ceramic composite material described in this example, the specific steps include:

[0035] 1) weighing 44.25% of raw material titanium carbide powder and 55.75% of boron powder by weight percentage for subsequent use;

[0036] 2) Put the weighed powder into the zirconia ball mill tank of the planetary ball mill, add ethanol solution as the dispersion medium for mixing, the total volume of powder, balls and ethanol is two-thirds of the volume of the ball mill tank, planetary The rotating speed of the ball mill is 200r / min, and the ball milling time is 2h. After the mixing is completed, the balls are removed by sieving to obtain the slurry of the mixed powder;

[0037] 3) The slurry is dried in a vacuum oven at 60°C for 24 hours, ground after drying, and granulated through a 325-mesh sieve to obtain a mixed powder;

[0038] 4) Put the mixed powder obtained after drying and sieving into a cylindrical graph...

Embodiment 2

[0041] The preparation method of boron-rich boron carbide-titanium boride ceramic composite material described in this example, the specific steps include:

[0042] 1) weighing 40.98% of the raw material titanium carbide powder and 59.12% of the boron powder by weight percentage for subsequent use;

[0043]2) Put the weighed powder into the zirconia ball mill tank of the planetary ball mill, add ethanol solution as the dispersion medium for mixing, the total volume of powder, balls and ethanol is half of the volume of the ball mill tank, planetary The rotating speed of the ball mill is 250r / min, and the ball milling time is 2h. After the mixing is completed, the balls are removed by sieving to obtain the slurry of the mixed powder;

[0044] 3) The slurry is dried in a vacuum oven at 70°C for 36 hours, ground after drying, and granulated through a 200-mesh sieve to obtain a mixed powder;

[0045] 4) Put the mixed powder obtained after drying and sieving into a cylindrical grap...

Embodiment 3

[0048] The preparation method of boron-rich boron carbide-titanium boride ceramic composite material described in this example, the specific steps include:

[0049] 1) weighing 39.52% of the raw material titanium carbide powder and 60.48% of the boron powder by weight percentage;

[0050] 2) Put the weighed powder into the zirconia ball mill tank of the planetary ball mill, add ethanol solution as the dispersion medium for mixing, the total volume of powder, balls and ethanol is two-thirds of the volume of the ball mill tank, planetary The rotating speed of the ball mill is 300r / min, and the ball milling time is 2h. After the mixing is completed, the balls are removed by sieving to obtain the slurry of the mixed powder;

[0051] 3) The slurry was dried in a vacuum drying oven at 80°C for 48 hours, ground after drying, and granulated through a 325 mesh sieve to obtain a mixed powder;

[0052] 4) Put the mixed powder obtained after drying and sieving into a cylindrical graphite...

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Abstract

The invention relates to a fine-grain boron-rich boron carbide-based ceramic composite material and a preparation method thereof, the main phases of which are boron-rich boron carbide and titanium boride, titanium boride dispersed in boron-rich boron carbide, and boron-rich boron carbide And titanium boride phase distribution is uniform, no cracks between grains. The fine-grained boron-rich boron carbide-based composite ceramic material is formed by mixing titanium carbide powder and boron powder through discharge plasma sintering, wherein the titanium carbide powder is 39.5%-44.3% by mass percentage, and the boron powder is 39.5%-44.3%. 55.7%‑60.5%. The boron-rich boron carbide-titanium boride ceramic composite material provided by the invention has uniform grain size and phase distribution, a large boron carbide-to-carbon ratio and is convenient to control; the material has high density and excellent performance.

Description

technical field [0001] The invention relates to a ceramic composite material and a preparation method thereof, in particular to a fine-grain boron-rich boron carbide-based composite ceramic material and a preparation method thereof. Background technique [0002] Boride ceramics are an important class of engineering materials. Due to their unique physical and chemical properties (such as high hardness, high modulus, low specific gravity, excellent high temperature resistance and electrical conductivity), they are very important in modern industry and national defense construction. Application prospects. In the past ten years, the research on boride ceramic materials has attracted great attention at home and abroad. Boron carbide ceramics is an engineering ceramic with outstanding comprehensive performance among boride ceramics. Its excellent comprehensive performance makes it one of the key new materials for national defense construction. On the premise of maintaining its e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/563C04B35/58C04B35/64
CPCC04B35/563C04B35/58071C04B35/65C04B2235/3843C04B2235/421C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/666C04B2235/77C04B2235/96
Inventor 王为民师云威成立何强龙傅正义
Owner WUHAN UNIV OF TECH
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