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Boron carbide composite material and preparation method thereof

A technology of composite materials and boron carbide, which is applied in the field of layered boron carbide metal composite materials and its preparation, can solve the problems of high sintering temperature, large performance dispersion, and difficulty in preparing complex shapes, so as to improve interface bonding strength and good Toughness, effect of reducing defect sensitivity

Active Publication Date: 2017-09-08
HUAZHONG UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a layered boron carbide composite material with excellent mechanical properties and its preparation method, which is used to solve the problems in the prior art such as high sintering temperature, large performance dispersion, and difficulty in preparing complex shapes.

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  • Boron carbide composite material and preparation method thereof

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Effect test

Embodiment 1

[0027] A boron carbide composite material is characterized in that the raw materials include the following components by weight percentage: 30% of 0.2 μm boron carbide powder, 25% of 0.2 μm silicon powder and 25% of 0.2 μm carbon powder and 20% of 2μm aluminum powder.

[0028] The boron carbide powder has a cubic boron carbide content >98%.

[0029] The silicon powder is spherical silicon powder, and the content of impurity elements should be less than 1wt%.

[0030] The carbon powder is spherical graphite powder.

[0031] The aluminum powder is spherical aluminum powder.

[0032] The preparation method of the present embodiment is characterized in that it comprises the following steps:

[0033] Step 1, weighing 30% of 0.2 μm boron carbide powder, 25% of 0.2 μm silicon powder, 25% of 0.2 μm carbon powder and 20% of 2 μm aluminum powder;

[0034] Step 2, take out 70% of the total amount of aluminum powder for use, and prepare the mixed powder A by wet ball milling the remai...

Embodiment 2

[0038] A boron carbide composite material is characterized in that the raw materials include the following components by weight percentage: 40% of 2 μm boron carbide powder, 10% of 4 μm silicon powder and 5% of 2 μm carbon powder and 10% of 3 μm aluminum powder and 35% of 10μm lead powder.

[0039] The boron carbide powder has a cubic boron carbide content >98%.

[0040] The silicon powder is spherical silicon powder, and the content of impurity elements should be less than 1wt%.

[0041] The carbon powder is spherical amorphous carbon powder.

[0042] Both the aluminum powder and the lead powder are spherical powders.

[0043] The preparation method of the present embodiment is characterized in that it comprises the following steps:

[0044] Step 1, weighing 40% of 2 μm boron carbide powder, 10% of 4 μm silicon powder, 5% of 2 μm carbon powder, 10% of 3 μm aluminum powder and 35% of 10 μm lead powder;

[0045] Step 2, take out 70% of the total amount of aluminum powder an...

Embodiment 3

[0049] A boron carbide composite material is characterized in that the raw materials include the following components by weight percentage: 40% 200 μm boron carbide powder, 10% 200 μm silicon powder, 10% 200 μm carbon powder and 40% 200 μm lead powder .

[0050] The boron carbide powder has a cubic boron carbide content >98%.

[0051] The silicon powder is spherical silicon powder, and the content of impurity elements should be less than 1wt%.

[0052] The carbon powder is spherical graphite powder.

[0053] The lead powder is spherical lead powder.

[0054] The preparation method of the present embodiment is characterized in that it comprises the following steps:

[0055] Step 1, weighing 40% of 200 μm boron carbide powder, 10% of 200 μm silicon powder, 10% of 200 μm carbon powder and 40% of 200 μm lead powder;

[0056] Step 2, take out 50% of the total amount of the lead powder for use, and prepare the mixed powder A with the remaining lead powder and the above-mentioned...

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Abstract

The invention discloses a boron carbide composite material and a preparation method thereof. The boron carbide composite material is characterized by being prepared from the following components in percentage by mass: 30 to 60 percent of boron carbide powder, 5 to 25 percent of carbon dust, 10 to 25 percent of silicon powder and 15 to 45 percent of metal powder. The preparation method comprises the following steps: weighing the components according to corresponding proportions, taking out part of powder from the metal powder according to the demand for later use, and mixing remaining metal powder with other powder to obtain ceramic-metal mixed powder; respectively carrying out layer-by-layer sintering on the metal powder and the ceramic-metal mixed powder by adopting a directional energy field, and repeating the sintering process until material additive manufacturing is finished, wherein the atmosphere in the whole manufacturing process is a protective atmosphere such as vacuum atmosphere or argon atmosphere. The boron carbide composite material prepared by the preparation method disclosed by the invention is of a laminated structure, has the characteristics of high obdurability, good radiation resistance, low density, high reliability and the like, and can be widely used as a high-performance frictional material, an armored protection material, a storage material of a nuclear reactor spent fuel and the like.

Description

technical field [0001] The invention belongs to the technical field of ceramic matrix composite materials, in particular to a layered boron carbide metal composite material and a preparation method thereof. Background technique [0002] Boron carbide composite materials have many excellent properties such as high hardness, wear resistance and radiation resistance, and are widely used in the treatment of nuclear reactor spent fuel, the preparation of bulletproof armor materials and wear-resistant materials. It includes boron carbide-based polymer composite materials, boron carbide-based ceramic composite materials, and boron carbide-based metal composite materials. Among them, boron carbide-based metal composites have more application prospects in fields such as spent fuel treatment and armor protection due to their lower defect sensitivity and better toughness. At present, the common process methods of boron carbide-based metal composite materials are as follows: [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/76C04B35/563C04B35/622C04B35/64B33Y70/00C04B37/02G21F1/12G21F1/02
CPCB33Y70/00C04B35/563C04B35/622C04B35/64C04B35/76C04B37/021C04B2235/40C04B2235/402C04B2235/404C04B2235/422C04B2235/428C04B2235/5436C04B2235/5445C04B2235/5481C04B2235/665C04B2235/667C04B2235/94G21F1/02G21F1/125
Inventor 吴甲民刘荣臻史玉升程立金陈敬炎肖欢李晨辉贺智勇
Owner HUAZHONG UNIV OF SCI & TECH
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