Preparation method of structure and function integrated neutron absorbing material

A technology of absorbing materials and functions, applied in the field of radiation protection, can solve the problems of low strength, unsatisfactory dry storage structure and functional integration, and achieve the effects of high density, improved distribution uniformity, and excellent mechanical properties

Inactive Publication Date: 2019-06-07
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the existing reported B 4 The mechanical properties of C / Al metal matrix composites decrease almost linearly with the increase of temperature, and the strength is low at the ambient temperature of dry storage (300°C~400°C), which cannot meet the needs of dry storage and the integration of structure and function.

Method used

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  • Preparation method of structure and function integrated neutron absorbing material
  • Preparation method of structure and function integrated neutron absorbing material
  • Preparation method of structure and function integrated neutron absorbing material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 31% boron carbide powder, 1% Y 2 o 3 powder, 68% 6061 aluminum powder, put it into a ball mill tank and mill it for 10 hours, and the ball milling speed is 100 r / min, and finally get a mixed powder; put the mixed powder into a soft mold and use cold isostatic pressing to form it. The compression pressure is 270MPa, and the time is 5min; the cold compact is put into the aluminum sheath, degassed and welded, and the densification treatment is carried out by hot rolling, and the hot rolling temperature is 450°C; the densified neutron absorbing material is heated at 350°C Further hot rolling to the final size; the hot-rolled sheet was annealed at 450° C. for 60 minutes in an air atmosphere to obtain a structural-functional integrated neutron absorbing material. The neutron absorbing plate B prepared in this embodiment 4 C particles are evenly distributed, such as figure 1 As shown, the tensile strength is 326MPa.

Embodiment 2

[0036] Weigh 12% boron carbide powder, 8% Al 2 o 3 powder, 80% 6061 aluminum powder, put it into a ball mill tank and mill it for 25 hours, the ball milling speed is 200 r / min, and finally get a mixed powder; put the mixed powder into a soft mold and use cold isostatic pressing to form, cold isostatic The compression pressure is 120MPa, and the time is 30min; the cold compact is put into the aluminum sheath, degassed and welded, and the densification process is carried out by hot isostatic pressing. The hot isostatic pressing temperature is 550°C, and the time is 20min; The neutron absorbing material was hot-rolled at 450°C to the final size; the hot-rolled plate was annealed at 550°C for 20 minutes in a vacuum atmosphere to obtain a structurally functional integrated neutron absorbing material. The neutron absorbing plate B prepared in this embodiment 4 C particles are evenly distributed, such as figure 2 As shown, the tensile strength is 282MPa.

Embodiment 3

[0038] Weigh 20% boron carbide powder, 10% Zr 2 o 3 powder, 70% 7075 aluminum powder, put it into a ball mill tank and mill it for 2 hours, the ball milling speed is 300 r / min, and finally get a mixed powder; put the mixed powder into a soft mold and use cold isostatic pressing to form, cold isostatic The compression pressure is 200MPa, and the time is 5min; the cold compact is put into the aluminum sheath, degassed and welded, and densified by hot forging, and the hot forging temperature is 600°C; the densified neutron absorbing material is Hot rolling to the final size; the hot-rolled sheet was annealed at 620° C. for 200 min in an argon atmosphere to obtain a structural-functional integrated neutron absorbing material. The neutron absorbing plate B prepared in this embodiment 4 C particle distribution is relatively uniform (such as image 3 shown), the tensile strength can reach 497MPa.

[0039] In the present invention, aluminum alloy may also be used as the raw materi...

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Abstract

The invention relates to a preparation method of a structure and function integrated neutron absorbing material. The method prepares the structure and function integrated neutron absorbing material byadopting a powder metallurgy method through such processes as burdening, ball milling, molding, sealing, compactness, hot rolling and annealing with boron carbide powder, nanometal oxides, aluminum and alloy powder as raw materials. The structure and function integrated neutron absorbing material prepared by the method is excellent in component uniformity, high in compactness, high in heat conductivity and excellent in mechanical performance.

Description

technical field [0001] The invention relates to a preparation method of a structure-function integrated neutron absorbing material, which belongs to the field of radiation protection. Background technique [0002] With the rapid development of the national nuclear power industry, the amount of spent fuel discharged from nuclear reactors is increasing day by day. The spent fuel is extremely radioactive and accompanied by a certain neutron emission rate. According to statistics, usually each million-kilowatt nuclear power unit can unload 25 tons of spent fuel per year. According to my country’s nuclear power development goals, it is expected to unload more than 1,000 tons of spent fuel every year after 2020. Its safe storage and transportation have become indispensable. evasive question. At present, most of the spent fuel storage methods at home and abroad adopt wet storage, that is, the spent fuel is stored on the spent fuel storage grid in the pool. However, this storage met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00B22F9/04B22F3/04B22F3/24G21F1/02
Inventor 张鹏程王鑫庞晓轩刘彦章鲜亚疆王傲松罗昊王伟
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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