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Preparation process of aluminum-based boron carbide neutron absorbing material

An aluminum-based boron carbide and absorbing material technology, which is applied in the field of preparation technology of aluminum-based boron carbide neutron absorbing materials, can solve the problems of low thermal conductivity, unstable neutron absorption capacity, poor mechanical properties, etc., and achieves stable composition , The effect of improving dryness and stable performance

Inactive Publication Date: 2018-07-06
镇江华核装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional B4C / Al composite material for neutron absorption adopts box loose rolling process. B4C and Al are uniformly mixed and then loosely packed in the aluminum alloy box. After exhausting, they are directly rolled, and the obtained composite material has a sandwich structure. , in the middle of the upper and lower layers of aluminum plates is still a powder and does not form a continuous composite block. Therefore, the mechanical properties of the product are poor, the thermal conductivity is low, and the neutron absorption capacity is unstable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation process of aluminum-based boron carbide neutron absorbing material is characterized in that the preparation steps are as follows:

[0021] (1) Aluminum powder pretreatment: put the untreated aluminum powder in an oven for drying once, the drying temperature is 70°C, and the drying time is 10 minutes. The weight ratio of the ball to material is 4:1. After the tank is sealed, put it in the planetary ball mill, the speed of the ball mill is 400rpm, and the ball milling time is 1h. After the drying is completed, it is naturally cooled to normal temperature to obtain the treated aluminum powder;

[0022] (2)B 4 C powder pretreatment: the untreated B 4 C powder is put into an oven for drying once. The drying temperature is 90°C and the drying time is 20 minutes. After sealing, in the planetary ball mill, the speed of the ball mill is 500rpm, and the ball milling time is 1.5h. After the ball milling, carry out secondary drying. The drying temperature is 70°C...

Embodiment 2

[0027] The preparation process of aluminum-based boron carbide neutron absorbing material is characterized in that the preparation steps are as follows:

[0028] (1) Aluminum powder pretreatment: put the untreated aluminum powder in an oven for drying once, the drying temperature is 90°C, and the drying time is 20 minutes. The weight ratio of the ball to material is 4:1. After the tank is sealed, put it in the planetary ball mill. The speed of the ball mill is 400rpm, and the ball milling time is 1h. After the drying is completed, it is naturally cooled to normal temperature to obtain the treated aluminum powder;

[0029] (2)B 4 C powder pretreatment: the untreated B 4 C powder is put into an oven for drying once, the drying temperature is 100°C, and the drying time is 30 minutes. After sealing, in the planetary ball mill, the speed of the ball mill is 500rpm, and the ball milling time is 1.5h. After the ball milling, carry out secondary drying. The drying temperature is 90...

Embodiment 3

[0034] The preparation process of aluminum-based boron carbide neutron absorbing material is characterized in that the preparation steps are as follows:

[0035] (1) Aluminum powder pretreatment: put the untreated aluminum powder into an oven for drying once, the drying temperature is 80°C, and the drying time is 15 minutes. The weight ratio of the ball to the material is 4:1. After the tank is sealed, put it in the planetary ball mill. The speed of the ball mill is 400rpm, and the ball milling time is 1h. After the drying is completed, it is naturally cooled to room temperature to obtain the treated aluminum powder;

[0036] (2)B 4 C powder pretreatment: the untreated B 4 C powder is put into an oven for drying once, the drying temperature is 95°C, and the drying time is 25 minutes. After sealing, in the planetary ball mill, the speed of the ball mill is 500rpm, and the milling time is 1.5h. After the ball milling, the second drying is carried out. The drying temperature i...

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Abstract

The invention discloses a preparation process of an aluminum-based boron carbide neutron absorbing material. The preparation process is characterized by comprising the following steps of (1) aluminumpowder preprocessing, (2) B4C powder preprocessing, (3) ball-milling mixing, (4) biscuit pressing and (5) hot-pressed sintering. The two types of powder are preprocessed before being mixed by adoptionof a dual preprocessing process, the dryness of the powder is improved through the process of two drying and one ball milling, subsequence procedures are implemented advantageously, the density of the final neutron absorbing material product can be improved, and interface bonding between the B4C powder and the aluminum powder is further improved; and uniform powder mixing and composition stabilization are ensured, and the effect that the product is stable in performance is ensured.

Description

technical field [0001] The invention particularly relates to a preparation process of an aluminum-based boron carbide neutron absorbing material. Background technique [0002] Due to the advantages of high efficiency, low consumption, and greenness, nuclear power has become one of the world's three major power supply pillars alongside thermal power and hydropower. At present, global nuclear power generation has accounted for 17% of the total electricity, of which France is as high as 77%, while my country only accounts for about 2.5%. In 2012, the Standing Committee of the State Council approved the "Nuclear Power Safety Plan (2011-2020)" and "Nuclear Power Mid- and Long-Term Development Plan (2011-2020)". By 2020, China's nuclear power installed capacity will reach 58 million kilowatts in operation, 30 million kilowatts under construction, and the proportion of nuclear power will reach 4% of the total electricity. Although nuclear power is the "new force" of low-carbon el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C29/06B22F9/04B22F3/14
CPCC22C1/051B22F3/14B22F9/04B22F2009/043B22F2998/10C22C29/062B22F3/02
Inventor 克磊韦江涛马云涛壮新王志伟唐小存蒋波
Owner 镇江华核装备有限公司