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An aluminum-based titanium diboride composite material for neutron shielding and its preparation method

An aluminum-based titanium diboride and composite material technology, which is applied in the field of metal materials, can solve the problems of coarseness, insignificant improvement in neutron shielding performance and mechanical performance, and decline, and achieves fine grain size, improved mechanical performance and neutron performance. Shielding performance, the effect of improving material performance

Active Publication Date: 2021-04-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It reduces the volume fraction of absorbing phases such as B4C by adding a small volume fraction of Gd or Gd-containing compounds, but due to a series of shortcomings such as coarseness and agglomeration of the Gd-containing phase, the improvement of neutron shielding performance and mechanical properties is not obvious or even somewhat decline

Method used

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  • An aluminum-based titanium diboride composite material for neutron shielding and its preparation method
  • An aluminum-based titanium diboride composite material for neutron shielding and its preparation method

Examples

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Effect test

Embodiment 1

[0033] An aluminum-based titanium diboride composite material for neutron shielding, wherein the mass fraction of magnesium is 6wt%, the mass fraction of Gd is 1wt%, the mass fraction of TiB2 is 8wt%, and the balance is aluminum.

[0034] The preparation method of this composite material comprises the steps:

[0035] A. Add pure Al, Al-TiB2 high-purity masterbatch, pure Mg and Al-Gd master alloy into the crucible, melt it completely at a melting temperature of 800°C, then vacuumize the fluid, then filter and cast, Finally, air cooling is carried out to obtain ingots.

[0036] B. Put the ingot obtained in step A into the crucible, and keep it at the melting temperature for 60 minutes, so that the ingot is completely melted into a fluid, and the molten fluid is added to the spray atomization equipment, and the fast-flowing nitrogen will break the fluid to obtain fine particles. small droplets, which are then cooled to form a powder.

[0037] C. Fill the powder obtained in step...

Embodiment 2

[0040]An aluminum-based titanium diboride composite material for neutron shielding, wherein the mass fraction of magnesium is 6wt%, the mass fraction of Gd is 1wt%, the mass fraction of TiB2 is 11.8wt%, and the balance is aluminum.

[0041] The preparation method of this composite material comprises the steps:

[0042] A. Add pure Al, Al-TiB2 high-purity masterbatch, pure Mg and Al-Gd master alloy into the crucible, melt it completely at a melting temperature of 600°C, then vacuumize the fluid, then filter and cast, Finally, air cooling is carried out to obtain ingots.

[0043] B. Put the ingot obtained in step A into the crucible, and keep it at the melting temperature for 120 minutes, so that the ingot is completely melted into a fluid, and the molten fluid is added to the spray atomization equipment, and the fast-flowing nitrogen will break the fluid to obtain fine particles. small droplets, which are then cooled to form a powder.

[0044] C. Fill the powder obtained in s...

Embodiment 3

[0047] An aluminum-based titanium diboride composite material for neutron shielding, wherein the mass fraction of magnesium is 1wt%, the mass fraction of Gd is 20wt%, the mass fraction of TiB2 is 1wt%, and the balance is aluminum.

[0048] The preparation method of this composite material comprises the steps:

[0049] A. Add pure Al, Al-TiB2 high-purity masterbatch, pure Mg and Al-Gd master alloy into the crucible, melt it completely at a melting temperature of 1000°C, then vacuumize the fluid, then filter and cast, Finally, air cooling is carried out to obtain ingots.

[0050] B. Put the ingot obtained in step A into the crucible, and keep it at the melting temperature for 5 minutes, so that the ingot is completely melted into a fluid, and the molten fluid is added to the spray atomization equipment, and the fast-flowing nitrogen gas will break the fluid to obtain fine particles. small droplets, which are then cooled to form a powder.

[0051] C. Fill the powder obtained in...

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Abstract

The invention discloses an aluminum-based titanium diboride composite material for neutron shielding and a preparation method thereof, and relates to the technical field of metal materials; the mass fraction range of magnesium in the composite material is 1-20wt%, and the mass fraction range of Gd 0.1-20wt%, the mass fraction range of TiB2 is 1-20wt%, and the balance is aluminum. The preparation method comprises the following steps: A, melting the Al-Mg-Gd (TiB2) raw material to obtain an ingot; B, atomizing the ingot and spraying powder to obtain a powder; C, sintering the powder by discharge plasma to obtain a sintered sample; D 1. The sintered sample is hot-extruded to obtain an aluminum-based titanium diboride composite material for neutron shielding. Through rapid solidification and other processes, nano-phases with dispersed distribution and strong neutron absorption capacity are formed in the composite material. This preparation method not only greatly improves the neutron shielding performance, but also ensures the excellent mechanical properties of the material, and realizes the material. Structural and functional integration.

Description

technical field [0001] The invention relates to the technical field of metal materials, and relates to an aluminum-based titanium diboride composite material for neutron shielding and a preparation method thereof, in particular to a light-weight and high-strength aluminum-based titanium diboride for neutron shielding Composite materials and methods for their preparation. Background technique [0002] There is strong neutron radiation in the spent fuel storage grid of nuclear power plants. With the development of nuclear power plants, the protection of neutron radiation has become an urgent problem to be solved; in order to prevent nuclear radiation, neutron absorbing materials and technologies are often used for shielding and protection, which puts extremely strict requirements on the performance of neutron absorbing materials. At present, the most common lightweight and high-strength neutron shielding materials at home and abroad are a series of aluminum-based composite ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C21/06C22C32/00C22C1/10C22C1/03B22F9/08B22F3/105B22F3/20
CPCC22C21/00C22C21/06C22C32/0073C22C1/1036B22F9/082B22F3/105B22F3/20B22F2998/10B22F2003/208C22C1/1047
Inventor 钟圣怡陈悦琛陈哲夏存娟王浩伟
Owner SHANGHAI JIAO TONG UNIV
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