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Aluminum-based boron carbide composite material and neutron absorption plate

A neutron absorbing plate and composite material technology, which is applied in the field of boron carbide aluminum matrix composite materials and neutron absorbing plates, can solve problems such as safety accidents, rupture of neutron absorbing plates, radiation, etc., so as to improve mechanical properties and prevent breakage , Improve the effect of storage safety performance

Active Publication Date: 2015-01-28
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, some existing neutron absorbing plate products often have safety accidents during the storage process, such as overheating of spent fuel during storage, causing safety accidents, and for example, the neutron absorbing plate breaks, which cannot effectively absorb neutrons. , leading to serious radiation problems

Method used

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  • Aluminum-based boron carbide composite material and neutron absorption plate
  • Aluminum-based boron carbide composite material and neutron absorption plate
  • Aluminum-based boron carbide composite material and neutron absorption plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The boron carbide aluminum-based composite material is prepared according to the liquid stirring method, and the specific preparation process is carried out according to the following steps:

[0028] 1) Ingredients: Weigh a certain quality of Al, Al-Ti master alloy and B 4 C powder; cleaning pure Al and Al-Ti master alloy; preheating B 4 C powder. When determining the quality of the raw materials here, the respective quality is calculated according to the final design goal. For example, it is hoped to prepare 100 kg of composite material, and it is hoped that the composite material contains 30 kg of B 4 C (30%), and 5 kg of Ti element (5%), 65 kg of Al element (65%), then B 4 C powder takes 30 kg; if Al-Ti-10 alloy is used, the Al-Ti-10 alloy takes 50 kg, so that Ti has 5 kg, Al has 45 kg, and the remaining pure Al raw material is 20 kg, which is 65 kg The Al element. Theoretically, it can be converted according to the above principles. In practice, considering the proble...

Embodiment 2

[0033] Example 2 is different from Example 1 in that the content of each component is changed.

[0034] For specific preparation, only step 1) Weigh a certain quality of Al, Al-Ti master alloy and B 4 The specific quality of the C powder is different, and the rest of the steps are the same as those in Example 1. The boron carbide-aluminum-based composite material in this example is prepared, and the chemical precipitation method is analyzed to obtain 33% B 4 C. It is determined by X-ray fluorescence spectrometry to obtain 3.5% Ti element and 62% Al element. In addition, a small amount (0.5% to 5%) of impurities (Al 3 BC and other impurity elements).

[0035] Such as figure 1 with 2 Shown are the scanning electron microscope topography and backscattering images of the boron carbide aluminum-based composite material in this embodiment, respectively. It can be found from the microstructure photo that in B 4 The surface of C particles is coated with a dense layer of Ti-B reaction produc...

Embodiment 3

[0037] The difference between Example 3 and Example 1 is: the content of each component has changed, the key change is the increase in Ti content, and a part of Ti is coated on B in the form of Ti-B compound. 4 C particle surface, the rest Ti is Al 3 The Ti form is dispersed in the aluminum matrix.

[0038] For specific preparation, only step 1) Weigh a certain quality of Al, Al-Ti master alloy and B 4 The specific quality of the C powder is different, and the rest of the steps are the same as those in Example 1. The boron carbide-aluminum-based composite material in this example was prepared, and analyzed by the chemical precipitation method to obtain 31% B 4 C. It is determined by X-ray fluorescence spectrometry to obtain 6% Ti element and 61% Al element. In addition, some trace amounts (0.5% to 5%) of impurities (Al 3 BC and other impurity elements).

[0039] Such as image 3 Shown is the scanning electron microscope topography of the boron carbide aluminum-based composite materia...

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Abstract

The invention discloses an aluminum-based boron carbide composite material and a neutron absorption plate. The aluminum-based boron carbide composite material comprises the following components in percentage by mass: 15-35 percent of B4C, 0.5-7 percent of a Ti element and 60-84.5 percent of a Al element, wherein in the composite material, the existence form of the Ti element is as follows: the Ti element coats the surface of B4C particles in a TiB2 compound form. The neutron absorption plate is a plate made from the aluminum-based boron carbide composite material. The test proves that the elongation rate of the aluminum-based boron carbide composite material at normal temperature is 6-16 percent and is superior to that of the conventional composite material, and when the prepared neutron absorption plate is used, collision or thermal stress deformation can be resisted, and the plate is difficult to break, so that the storage safety performance is improved. Meanwhile, the tensile strength and neutron absorption performance can meet the application requirements.

Description

【Technical Field】 [0001] The invention relates to a neutron absorption material in the field of nuclear energy, in particular to a boron carbide aluminum-based composite material and a neutron absorption plate. 【Background technique】 [0002] In boron carbide 10 B has a high neutron absorption capacity, so it is used to make neutron absorption materials and is widely used in the field of nuclear energy. The composite material including boron carbide and aluminum matrix is ​​the existing commonly used neutron absorbing material, and the existing more mature methods for preparing the neutron absorbing material mainly include powder metallurgy and liquid mixing. At present, for different preparation methods, the composition system of neutron absorbing materials is also different. The neutron absorption material is made into a neutron absorption board for use. When in use, the spent fuel rods unloaded from the nuclear reactor are intensively loaded in the stainless steel grid, and ...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C32/00G21C7/24
CPCC22C21/00C22C32/0057G21C7/24Y02E30/30
Inventor 刘伟李丘林李宇王靓
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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