High-entropy alloy with neutron poison characteristics and preparation method thereof

A high-entropy alloy and poison technology, which is applied in the field of new high-entropy alloys with neutron poison characteristics and their preparation, can solve the problems of insufficient attention to high-entropy alloy research, poor room temperature plasticity, and high alloy density, etc. The effect of improving the property, raising the yield strength level, high neutron absorption characteristics

Active Publication Date: 2020-11-17
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the current typical BCC structure refractory high-entropy alloys such as TaNbMoW, TaNbMoWV, etc. contain a large number of high-density metal elements, the alloy has high density, high cost, poor room temperature plasticity, and is difficult to be used as a bottleneck problem for structural materials. The research on high-entropy alloys with toxic characteristics has not been given sufficient attention. The present invention proposes a high-entropy alloy based on the Al-Nb-Zr-Mo-Hf-B system, and fully considers the special effect of the B element, thereby realizing the high-entropy alloy The structural and functional integration of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An Al-Nb-Zr-Mo-Hf-B system high-entropy alloy with neutron poison properties, the specific alloy composition is: 5 at.% Al, 40 %Zr, 30 % Nb, 15% Mo, 9.8% Hf, 0.2% B, and the rest are unavoidable impurity elements.

[0025] The preparation method of the novel Al-Nb-Zr-Mo-Hf-B system high-entropy alloy of this embodiment is:

[0026] (1) Prepare raw materials: Weigh the required alloy raw materials according to the proportion of the new Al-Nb-Zr-Mo-Hf-B system high-entropy alloy. The specific alloy composition is: 5 at.% Al, 40 Zr, 30 % Nb , 15% Mo, 9.8% Hf, 0.2% B;

[0027] (2) Arc melting: Under the protection of protective gas, Al, Zr, Nb, Mo, Zr-Hf master alloy, and B powder were heated and melted rapidly; in order to obtain alloy ingots with uniform composition, all samples were smelted five times repeatedly, The samples were turned over after each smelting pass. In order to avoid possible effects on the microstructure and performance of the sample due to differen...

Embodiment 2

[0030] An Al-Nb-Zr-Mo-Hf-B system high-entropy alloy with neutron poison properties, the specific alloy composition is: 14at.% Al, 60% Zr, 20% Nb, 4.99% Mo, 1% Hf, 0.01 % B, and the rest are unavoidable impurity elements.

[0031] The preparation method of the novel Al-Nb-Zr-Mo-Hf-B system high-entropy alloy of this embodiment is:

[0032] (1) Prepare raw materials: Weigh the required alloy raw materials according to the ratio of the new Al-Nb-Zr-Mo-Hf-B system high-entropy alloy. The specific alloy composition is: 14at.% Al, 60% Zr, 20% Nb, 4.99% Mo, 1% Hf, 0.01% B;

[0033](2) Arc melting: Under the protection of protective gas, Al, Zr, Nb, Mo, Zr-Hf master alloy, and B powder were heated and melted rapidly; in order to obtain alloy ingots with uniform composition, all samples were smelted five times repeatedly, The samples were turned over after each smelting pass. In order to avoid possible effects on the microstructure and performance of the sample due to differences i...

Embodiment 3

[0036] An Al-Nb-Zr-Mo-Hf-B system high-entropy alloy with neutron poison properties, the specific alloy composition is: 11at.% Al, 22% Zr, 40% Nb, 5% Mo, 20% Hf, 2 % B, and the rest are unavoidable impurity elements.

[0037] The preparation method of the novel Al-Nb-Zr-Mo-Hf-B system high-entropy alloy of this embodiment is:

[0038] (1) Preparation of raw materials: Weigh the required alloy raw materials according to the ratio of the new Al-Nb-Zr-Mo-Hf-B system high-entropy alloy. The specific alloy composition is: 11at.% Al, 22% Zr, 40% Nb, 5% Mo, 20% Hf, 2% B;

[0039] (2) Arc melting: Under the protection of protective gas, Al, Zr, Nb, Mo, Zr-Hf master alloy, and B powder were heated and melted rapidly; in order to obtain alloy ingots with uniform composition, all samples were smelted five times repeatedly, The samples were turned over after each smelting pass. In order to avoid possible effects on the microstructure and performance of the sample due to differences in ...

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Abstract

The invention discloses an Al-Nb-Zr-Mo-Hf-B system high-entropy alloy with neutron poison characteristics, and belongs to the field of high-entropy alloy materials. The Al-Nb-Zr-Mo-Hf-B system high-entropy alloy is prepared from the following components in percentage by mass: 5-15% of aluminum, 20-30% of niobium, 37-60% of zirconium, 4.99-15% of molybdenum, 1-20% of hafnium and the balance of boron (0.01-2%) and inevitable impurities. Aiming at the bottleneck problems that a conventional refractory high-entropy alloy of a typical BCC structure, such as TaNbMoW and TaNbMoWV, contains a large amount of high-density metal elements, is high in alloy density, high in cost and poor in room-temperature plasticity, and is difficult to use as a structural material, and the situation that the research on the high-entropy alloy with neutron poison characteristics is not fully paid attention to in original research, the high-entropy alloy based on the Al-Nb-Zr-Mo-Hf-B system is provided, the special effect of the element B is fully considered, and therefore structural function integration of the high-entropy alloy is achieved.

Description

technical field [0001] The invention belongs to the field of high-entropy alloy materials, in particular to a novel high-entropy alloy with neutron poison properties and a preparation method thereof. Background technique [0002] High-entropy alloys are a brand-new alloy design idea. The simple phase composition and excellent comprehensive properties make high-entropy alloys have great development potential. At present, most of the research on high-entropy alloys is concentrated on the classical system of FeCoNiCrMn and the derived single-phase FCC high-entropy alloy system composed of transition group elements with equiatomic ratio or near equiatomic ratio. However, many studies have shown that FCC system high-entropy alloys have the characteristics of low yield strength, and phase separation will occur after long-term aging at medium temperature, so their microstructure stability is poor. On the other hand, typical BCC structure refractory high-entropy alloys such as TaNb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C16/00C22C30/00C22C1/03G21F1/08
CPCC22C1/03C22C16/00C22C30/00G21F1/085
Inventor 潘虎成滕常青吴璐邓志勇张伟毛建军覃检涛伍晓勇
Owner NORTHEASTERN UNIV
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