Nuclear rare earth modified aluminum-based boron carbide material and preparation method thereof

A technology of aluminum-based boron carbide and rare earth modification, which is applied in the field of rare earth modified aluminum-based boron carbide materials for nuclear use and its preparation, can solve problems such as difficult batch production, difficult plastic processing, and poor corrosion resistance, so as to achieve high efficiency. Density, increased plasticity and ductility, good corrosion resistance

Pending Publication Date: 2021-12-31
中硼科技(威海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a rare earth modified aluminum-based boron carbide material for nuclear use and its preparation method, which can effectively solve the problems of insufficient physical and mechanica

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  • Nuclear rare earth modified aluminum-based boron carbide material and preparation method thereof

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Example Embodiment

[0031] like figure 1 Shown, the preparation method of rare earth modified aluminum-based boron carbide material comprises the following steps:

[0032] (1) Powder pretreatment, pre-oxidize the 6061 aluminum alloy powder in an oxygen-containing atmosphere, the treatment temperature is 240°C-270°C, preferably 250°C-260°C;

[0033] (2) Powder ball milling and mixing, the pre-oxidized powder obtained in step (1) and boron carbide powder, rare earth oxide powder are fully ball milled and mixed in a polyurethane ball milling tank, the ball milling time is 12-24 hours, and the polyurethane ball milling tank The milling balls are boron carbide balls;

[0034] (3) Cold press forming, cold press forming the mixed powder obtained in step (2), the cold press forming pressure is 60MPa-80MPa, preferably 65MPa-75MPa;

[0035] (4) Vacuum hot-pressing sintering, using a vacuum hot-pressing furnace to hot-press the cold-pressed blank obtained in step (3) to obtain a hot-pressed billet. The ho...

Example Embodiment

[0038] Embodiment one

[0039] Rare earth modified aluminum-based boron carbide material, the weight ratio of raw material components is:

[0040] components parts by weight Boron carbide powder (particle size 15 microns) 14 Boron carbide powder (particle size 1 micron) 14 Rare earth oxide powder (gadolinium oxide, particle size 10 microns) 1 Rare earth oxide powder (samarium oxide, particle size 10 microns) 1 6061 aluminum alloy powder (particle size 45 microns) 70

[0041] The preparation method of a rare earth modified aluminum-based boron carbide material comprises the following steps:

[0042] (1) Powder pre-treatment, the 6061 aluminum alloy powder is subjected to pre-oxidation treatment in an oxygen-containing atmosphere, and the treatment temperature is 250°C;

[0043] (2) Powder ball milling, the pre-oxidized powder obtained in step (1), boron carbide powder, and rare earth oxide powder are fully ball milled and mixed in ...

Example Embodiment

[0049] Embodiment two

[0050] Rare earth modified aluminum-based boron carbide material, the weight ratio of raw material components is:

[0051] components parts by weight Boron carbide powder (particle size 3 microns) 20 Rare earth oxide powder (gadolinium oxide, particle size 10 microns) 2 6061 aluminum alloy powder (particle size 25 microns) 78

[0052] The preparation method of a rare earth modified aluminum-based boron carbide material comprises the following steps:

[0053] (1) Powder pre-treatment, the 6061 aluminum alloy powder is subjected to pre-oxidation treatment in an oxygen-containing atmosphere, and the treatment temperature is 250°C;

[0054] (2) Powder ball milling, the pre-oxidized powder obtained in step (1), boron carbide powder, and rare earth oxide powder are fully ball milled and mixed in a polyurethane ball mill tank, and the ball mill time is 16 hours. The ball mill in the polyurethane ball mill tank The ball is a ...

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Abstract

The invention discloses a nuclear rare earth modified aluminum-based boron carbide material and a preparation method thereof, and relates to the field of nuclear materials. The material comprises the following components in parts by weight: 20-40 parts of boron carbide powder, 0.1-5 parts of rare earth oxide powder and 55-79.9 parts of aluminum alloy powder. The preparation method comprises the following steps: (1) powder pretreatment, (2) powder ball-milling and mixing, (3) cold press molding, (4) vacuum hot pressed sintering, (5) rolling, and (6) post-treatment to obtain a final product. The problems that a traditional aluminum-based boron carbide material is insufficient in physical and mechanical performance, difficult to plastically process, not resistant to corrosion, difficult to produce in batches and the like are effectively solved, and the aluminum-based boron carbide material is suitable for the fields of nuclear power station spent fuel storage and transportation and the like.

Description

technical field [0001] The invention relates to the field of nuclear materials, in particular to a rare earth modified aluminum-based boron carbide material for nuclear use and a preparation method thereof. Background technique [0002] With the continuous development of the nuclear industry, more and more spent radioactive fuel is continuously produced. In view of safety considerations, the produced spent fuel is usually temporarily stored in a grid pool, and dense storage grids must be installed between each storage unit. Neutron-absorbing materials to prevent fission reactions that stimulate each other in spent fuel. The materials used to treat spent fuel not only require high thermal neutron absorption capacity, but also high strength, high temperature corrosion resistance, radiation resistance, and low thermal expansion coefficient. Aluminum-based boron carbide materials have been widely used in various nuclear power projects at home and abroad because of their advanta...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00C22C1/05B22F9/04B22F1/00B22F3/02B22F3/14B22F3/18
CPCC22C21/00C22C32/0047C22C1/05B22F9/04B22F3/02B22F3/14B22F3/18B22F2009/043
Inventor 赵国璋王洪涛谢铭
Owner 中硼科技(威海)有限公司
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