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Preparation method of low-cost boron carbide/aluminum composite board

A boron carbide and aluminum composite technology, applied in the field of materials, can solve the problems of high impurity content such as iron, complex process and high cost, and achieve the effects of low impurity content, simplified preparation process and short production cycle

Active Publication Date: 2015-01-28
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the boron carbide-aluminum composite material prepared by high-energy ball milling and sintering or hot pressing, the content of impurities such as iron is high, the process is complicated, the energy consumption is high, and the cost is high.

Method used

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  • Preparation method of low-cost boron carbide/aluminum composite board
  • Preparation method of low-cost boron carbide/aluminum composite board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) according to the following mass ratio B 4 C: aluminum alloy = 15:85 weigh B 4 C and aluminum alloy. B to be weighed 4 C and aluminum alloy are put into an aluminum ball mill pot for grinding, and the grinding balls are tungsten balls. After grinding, the slurry obtained by grinding is precipitated and dried to obtain mixed powder.

[0039] (2) Put the mixed powder prepared in step 1 into a mold, and mold it into a core blank with a pressure of 30 MPa.

[0040] (3) Aluminum alloy is used as the sheath material, and the core blank prepared in step 2 is loaded into the sheath; then the sheath is welded and packaged by argon arc welding, leak detection is carried out, and the heat degassing treatment is carried out after welding and packaging, and the temperature is 300°C, the time is 6h.

[0041] (4) Hot-rolling the core billet packaged by sheath welding and heat degassing treatment in step 3 to the designed size, the hot-rolling temperature is 350°C. After the h...

Embodiment 2

[0044] (1) according to the following mass ratio B 4 C: aluminum alloy = 5:95 weigh B 4 C and aluminum alloy. B to be weighed 4 C and aluminum alloy are put into an aluminum ball mill pot for grinding, and the grinding balls are tungsten balls. After grinding, the slurry obtained by grinding is precipitated and dried to obtain mixed powder.

[0045](2) Put the mixed powder prepared in step 1 into a mold, and mold it into a core blank with a pressure of 120 MPa.

[0046] (3) Aluminum is used as the sheath material, and the core blank prepared in step 2 is loaded into the sheath; the sheath is welded and packaged by argon arc welding, leak detection is carried out, and the heating and degassing treatment is carried out after welding and packaging, and the temperature is 500 ℃, the time is 3h.

[0047] (4) Hot-rolling the core billet packaged by sheath welding and heating and degassing in step 3 to the designed size, and the hot-rolling temperature is 450°C. After the hot r...

Embodiment 3

[0050] (1) according to the following mass ratio B 4 C: aluminum alloy = 50:50 weigh B 4 C and aluminum alloy. B to be weighed 4 C and aluminum alloy are put into an aluminum ball mill pot for grinding, and the grinding balls are tungsten balls. After grinding, the slurry obtained by grinding is precipitated and dried to obtain mixed powder.

[0051] (2) Put the mixed powder prepared in step 1 in a mold, and mold it into a core blank with a pressure of 200 MPa.

[0052] (3) Aluminum alloy is used as the sheath material, and the core blank prepared in step 2 is loaded into the sheath; then the sheath is welded and packaged by argon arc welding, leak detection is carried out, and the heat degassing treatment is carried out after welding and packaging, and the temperature is 600°C, the time is 2.5h.

[0053] (4) Hot-rolling the core billet packaged by sheath welding and heat-degassing treatment in step 3 to the designed size, and the hot-rolling temperature is 650°C. After ...

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Abstract

The invention discloses a preparation method of a low-cost boron carbide / aluminum composite board and the preparation method can be used for simplifying a preparation process of a B4C / Al neutron absorption board and lowering the cost. The preparation method comprises the following steps: preparing a mixture, molding a powder compact and rolling. Compared with a traditional B4C / Al composite preparation technology, the preparation method has the advantages that long-time sintering is not needed, a pressed green compact is directly subjected to hot rolling after being subjected to vacuum heating, and the pressed green compact forms a compact green compact body by virtue of control of a hot rolling process, so that a composite board is obtained. the process flow is effectively shortened and the production cost and the energy consumption are reduced on the premise of ensuring the board quality, and the preparation method has the advantages of short production period and low energy consumption. The composite board prepared by the preparation method is high in quality, low in impurity content, good in B4C distribution uniformity and excellent in strength and tenacity matching, can meet the demand of the neutron shielding field, and is suitable for serving as a neutron absorption material in a reactor spent fuel water pond and a transport container and used for controlling the critical safety of a spent fuel storage environment.

Description

technical field [0001] The invention relates to the field of materials, especially the field of preparation of composite shielding materials, and specifically relates to a low-cost method for preparing boron carbide / aluminum composite plates. A method for preparing a composite shielding material for radiation sites. Background technique [0002] Among the radiation generated in nuclear reactors, spent fuel assembly storage and other fields, the shielding problem that should be paid special attention to is neutron radiation, and neutron absorbing materials have become important materials in the process of storage and transportation. [0003] B 4 C has the advantages of high melting point, high strength, low density, small thermal expansion coefficient, good thermal conductivity, stable structure under neutron irradiation, good acid and alkali corrosion resistance, low cost and other physical and chemical properties. Therefore, in various nuclear reactor types and neutron ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/18C22C21/00C22C32/00G21C21/00
CPCY02E30/30
Inventor 庞晓轩王伟何林张鹏程晏朝晖蔡永军刘炳刚
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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