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A spent fuel storage grid with high volume fraction b 4 Preparation method of c/al composite material

A high volume fraction, storage grid technology, applied in the field of high volume fraction B4C/Al composite materials and preparation, can solve the problems of poor wettability, poor mechanical properties, and low density of boron carbide and aluminum liquid, and achieve excellent mechanical properties The effect of performance, low cost and high density

Active Publication Date: 2017-03-08
哈尔滨龙卓新材料合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention is to solve the existing high boron carbide content of B 4 C / Al composite materials have low density, poor mechanical properties, and poor wettability between boron carbide and molten aluminum below 1000°C, and a high volume fraction B for spent fuel storage grids is provided. 4 C / Al composite material and its preparation method

Method used

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specific Embodiment approach 1

[0019] Specific Embodiment 1: In this embodiment, a spent fuel storage rack with high volume fraction B 4 The C / Al composite material is made of 55% to 75% boron carbide and 25% to 45% aluminum or aluminum alloy by volume fraction; the boron carbide is boron carbide particles with a particle size of 17 μm or the boron carbide is a particle size It is a mixture of boron carbide particles with a particle size of 5 μm and boron carbide particles with a particle size of 17 μm.

[0020] When the boron carbide described in this embodiment is a mixture of boron carbide particles with a particle size of 5 μm and boron carbide particles with a particle size of 17 μm, the bulk density formula of boron carbide is f=0.64 / [1.0-(0.362-0.315 (μ) 0.7 )X L +0.955(μ) 4 (X L 2 / (1-X L ))], where μ is the particle size ratio of boron carbide particles with a particle size of 5 μm to that of boron carbide particles with a particle size of 17 μm, X L is the mass fraction of boron carbide par...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is: a spent fuel storage rack with high volume fraction B 4 The C / Al composite material is made of 60% boron carbide and 40% aluminum or aluminum alloy by volume fraction. Others are the same as the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is: a spent fuel storage rack with high volume fraction B 4The C / Al composite material is made of 70% boron carbide and 30% aluminum or aluminum alloy by volume fraction. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a high volume fraction B4C / Al composite for a spent fuel storage grid and a preparation method of the composite, in order to solve the problems that the existing high boron carbide content B4C / Al composite is low in density and poor in mechanical property and the wettability of boron carbide and molten aluminum is poor below 1000 degrees. The high volume fraction B4C / Al composite for the spent fuel storage grid is prepared by 55-75% of boron carbide and 25-45% of aluminum or an aluminium alloy according to volume fractions. The method comprises the steps that firstly, a boron carbide prefabricated body is prepared; secondly, molten aluminum is prepared; and thirdly, molten aluminum is pressed into gaps of the prefabricated body by utilizing a pressure infiltration technique, pressure maintaining and demoulding are performed, and the high volume fraction B4C / Al composite is obtained. The prepared B4C / Al composite is high in density and good in mechanical property, is a perfect spent fuel storage grid material.

Description

technical field [0001] The present invention relates to a high volume fraction B 4 C / Al composite material and preparation method. Background technique [0002] With the increasing development of nuclear energy, the safety of spent fuel storage and transportation has become one of the main concerns of people. Spent fuel refers to the nuclear fuel that has been burned in the reactor. It will mainly emit neutron radiation, produce a large amount of radiation to the surrounding environment, and cause great harm to the surrounding environment and human beings. At the same time, a large amount of spent fuel is discharged from the nuclear reactor every year. On the other hand, the rapid development of my country's nuclear power industry will also lead to a large amount of spent fuel, so the storage of spent fuel in the future will develop towards high density and long-term development, which puts forward new requirements for spent fuel storage grid materials. requirements. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C21/00C22C1/10
Inventor 武高辉姜龙涛徐中国康鹏超陈国钦张强修子扬苟华松
Owner 哈尔滨龙卓新材料合伙企业(有限合伙)
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