Neutron-shielding aluminum-based composite material and preparation method thereof

A technology of aluminum matrix composite material and matrix material, applied in the field of neutron shielding aluminum matrix composite material and its preparation, can solve the problems of poor comprehensive performance of materials and single shielding effect, and achieve the effects of good heat resistance and good application reliability

Inactive Publication Date: 2019-06-21
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shielding effect of commonly used shielding materials is relatively single, and there are some defects in some properties, such as mechanical properties, heat resistance and processability, which lead to poor overall performance of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation process of the neutron-shielding aluminum-based composite material of the present invention specifically includes the following steps:

[0021] (1) Take the raw material powder by the composition ratio of the shielding material;

[0022] (2) A double-cone high-efficiency mixer is used for mixing, and argon protection is poured into the mixing process, and the grinding medium is bearing steel balls;

[0023] (3) Use the cold isostatic pressing method to press the blank. During the cold isostatic pressing process, a rubber jacket is used to isolate the hydraulic medium (anti-wear hydraulic oil) from the powder. The cold isostatic pressing pressure is 100-200 MPa, and the holding time is 10-40min;

[0024] (4) After the blank is repaired into a regular shape, the sheath is prepared by using a pure aluminum sheet, and the cold isostatic pressed blank is put into the sheath;

[0025] (5) Degas the sheathed blank at a temperature of 300-450°C, and when the v...

Embodiment 1

[0029] Configure powder, weigh 1050g aluminum powder, ZrH 2 Powder 300g and Fu 10 B powder 150g. A double-cone high-efficiency mixer is used for mixing. During the mixing process, argon gas protection is poured in, and the grinding medium is bearing steel balls. After mixing, the powder is put into a cold isostatic pressing bag, and pressed into a green body by cold isostatic pressing, with a pressure of 100 MPa and a pressure hold of 10 minutes. Weld the preform sheath with pure aluminum, degas and package at 450°C. Then, hot isostatic pressing is carried out on the blank cover, the isostatic pressing temperature is 490°C, the pressure is 100MPa, and the pressure is maintained for 4 hours, the pure aluminum cover is removed, and the aluminum matrix composite material is obtained. The density of the material reaches the theoretical density. More than 99%.

Embodiment 2

[0031] Configure powder, weigh 600g of aluminum powder, ZrH 2 Powder 750g and rich 10 B powder 150g. A double-cone high-efficiency mixer is used for mixing. During the mixing process, argon gas protection is poured in, and the grinding medium is bearing steel balls. After mixing, the powder is put into a cold isostatic pressing bag, and is pressed into a green body by cold isostatic pressing at a pressure of 200 MPa, and the pressure is maintained for 40 minutes. Weld the blank sheath with pure aluminum, degas and package at 300°C. Then, hot isostatic pressing is carried out on the blank covering, the isostatic pressing temperature is 520°C, the pressure is 120MPa, and the pressure is kept for 2 hours, the pure aluminum covering is removed, and the aluminum matrix composite material is obtained. The density of the material reaches the theoretical density. More than 98%.

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PUM

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Abstract

The invention discloses a neutron-shielding aluminum-based composite material and a preparation method thereof. The neutron-shielding aluminum-based composite material adopts pure aluminum as a matrixmaterial, the shielding components comprises the following ingredients of, by mass percentage, 20%-50% of metal hydride, 10%-20% of 10B-rich elementary substances or compounds, and the balance aluminum and inevitable impurities. The preparation method comprises the following steps of (1), weighing raw material powder according to the proportion of the aluminum-based composite material; (2), mixing the material under the protection condition of argon; (3), carrying out cold isostatic pressing forming on the mixture to obtain a cold isostatic pressed ingot blank; (4), putting the cold isostaticpressing ingot blank into an aluminum sleeve, degassing at the temperature of 300-450 DEG C, and carrying out hot isostatic pressing forming; and (5), removing the aluminum sleeve to obtain the aluminum-based composite material. The neutron-shielding aluminum-based composite material has good slowing-down and shielding effects on fast neutrons of more than 0.1 Million electron Volts, and has goodheat resistance, irradiation resistance and structural mechanical properties.

Description

technical field [0001] The invention relates to a neutron shielding aluminum-based composite material and a preparation method thereof, belonging to the technical field of nuclear shielding materials. Background technique [0002] With the popularization and application of nuclear technology, the research on nuclear radiation shielding has been paid more and more attention. High-energy fast neutrons have strong penetrating power. Although commonly used shielding materials such as boron steel and boron carbide composite materials have good shielding properties for thermal neutrons, they are difficult to use for high-energy fast neutron shielding. For the shielding of fast neutrons, fast neutrons need to be moderated first by light elements (such as hydrogen in water), and then slow neutrons with lower energy are shielded by neutron absorbers and the like. However, the currently commonly used shielding materials have a single shielding effect, and there are some defects in so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C21/00C22C30/00C22C32/00G21F1/08G21F1/10
Inventor 马书旺梁秋实王健杨剑杨志民毛昌辉甘斌何震陈富财
Owner GRIMAT ENG INST CO LTD
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