Composite shielding material and preparation method thereof

A compound shielding and raw material technology, applied in the field of materials, can solve the problems of poor mechanical properties, plasticity and processability of materials, and difficulties in material preparation, so as to improve neutron shielding performance, expand application potential, optimize mechanical properties and processing performance. Effect

Inactive Publication Date: 2013-09-04
SICHUAN INST OF MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention of the present invention is to: for will B 4 When C / Al composite material is used as shielding material, its B 4 The higher the content of C, the better the shielding effect on thermal neutrons, and the B in it 4 When the C content exceeds a certain ratio, the mechanical properties, plasticity and processability of the material are very poor, which brings great difficulties to the preparation of the material and greatly affects its application. A composite shielding material and its preparation method are provided. , specifically a B 4 C / Al composite shielding material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh the raw materials of the following quality: 0.1kg of natural B ( 10 The abundance of B is 19.8%), 15kg of WO 3 , 15kg of B 4 C, 65.9kg of 6061 aluminum alloy, 3kg of Ti, 1kg of Si, the total mass of raw materials is 100kg. Mix the raw materials, balls and milling medium at a mass ratio of 1:10:0.5 to obtain a mixture, and put the mixture into a ball mill tank for wet ball milling. The balls are made of stainless steel balls, and the milling medium is absolute ethanol. The rotating speed is 180r / min, and the ball milling time is 4h. After ball milling, the balls are separated to obtain a slurry, and the slurry is dried to obtain a mixed powder.

[0037] Put the mixed powder into a soft mold, and perform cold isostatic pressing with a pressure of 180 MPa, a temperature of 18°C, and a time of 40 minutes to obtain a cold compact. Put the cold-pressed billet into the package and seal it, then carry out hot isostatic pressing sintering, the hot isostatic pressing ga...

Embodiment 2

[0039] Take the raw material of following quality: 1kg of B ( 10 The abundance of B is 30%), 5kg of W 2 B 5 , 50kg of B 4 C, 41kg of 7075 aluminum alloy, 2kg of Si, 1kg of TiB 2 , the total mass of raw materials is 100kg. Mix the raw materials, balls and milling medium in a mass ratio of 1:5:0.2 to obtain a mixture, put the mixture into a stainless steel ball mill tank for wet ball milling, the balls are made of stainless steel balls, the milling medium is stearic acid, and the stainless steel ball mill The rotation speed of the tank is 150r / min, and the ball milling time is 8h. Mixed powder was obtained after ball milling.

[0040] Put the mixed powder into a soft mold and perform cold isostatic pressing. The cold isostatic pressing pressure is 200 MPa, the cold isostatic pressing temperature is 18°C, and the cold isostatic pressing time is 10 minutes to obtain a cold compact. Put the cold-pressed billet into the bag to seal, degas and carry out hot isostatic pressing s...

Embodiment 3

[0042] Take the raw material of following quality: the B of 3kg ( 10 The abundance of B is 90.0%), 10kg of W, 35kg of B 4 C, 44kg of pure aluminum, 4kg of Mg, 3kg of La, 1kg of Y 2 o 3 , the total mass of raw materials is 100kg. Mix the raw materials, balls and milling media in a mass ratio of 1:4:1 to obtain a mixture, put the mixture into a stainless steel ball mill tank for wet ball milling, the balls are made of stainless steel balls, the milling media is absolute ethanol, stainless steel The rotating speed of the ball milling jar is 100r / min, and the ball milling time is 20h. After ball milling, the balls are separated to obtain a slurry, and the slurry is precipitated and dried to obtain a mixed powder.

[0043] Put the mixed powder into a soft mold for cold isostatic pressing, the cold isostatic pressing pressure is 100MPa, the cold isostatic pressing temperature is 18°C, and the cold isostatic pressing time is 60min to obtain a cold compact. Put the cold-pressed ...

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PUM

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Abstract

The invention discloses a composite shielding material and a preparation method thereof and aims at solving the problems that when a B4C/Al composite material is used as a shielding material and the content of B4C exceeds a certain percentage, bad mechanical performance, plastically and workability of the material bring great difficulty for preparation of the material to greatly affect the application of the material although the higher the content of the B4C is, the greater and better the shielding effect on thermal neutrons are. The composite shielding material comprises materials prepared from the following raw materials in percentage by weight: 0.01%-5% of B, 0.1%-30% of W-containing substance, 3%-50% of B4C, 40%-90% of aluminum or aluminum alloy and 0-8% of other substances. The composite shielding material has excellent neutron/gamma radiation shielding performance, good mechanical performance and processing performance and high degree of densification and is especially suitable for the field of neutron/gamma ray shielding.

Description

technical field [0001] The invention relates to the field of materials, in particular to a composite shielding material and a preparation method thereof, specifically a B 4 The invention relates to a C / Al composite shielding material and a preparation method thereof, which can be used as a composite shielding material in nuclear radiation places such as nuclear reactors, storage of spent fuel components, and storage and transportation of radioactive substances. Background technique [0002] With the rapid development of nuclear energy and various nuclear reactors, the comprehensive performance requirements for neutron shielding materials used for radiation protection are getting higher and higher, and the development of comprehensive shielding materials with neutron and gamma radiation shielding has always been a priority in the field of nuclear safety. important topic. Usually, paraffin, polyethylene, polypropylene and other materials with high hydrogen content are excelle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C32/00C22C30/00C22C1/05G21F1/08
Inventor 张鹏程庞晓轩王伟刘朋闯
Owner SICHUAN INST OF MATERIALS & TECH
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