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A kind of yttrium-iron-based alloy material, preparation method and application

A technology of iron-based alloys and bulk materials, applied in the field of yttrium-iron-based alloy materials, can solve the problems of disproportionation and decomposition crystal structure, low reversible capacity, low hydrogen storage capacity, etc., and achieve small cycle hysteresis and high hydrogen storage capacity The effect of high and low hydrogen absorption temperature

Active Publication Date: 2017-06-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen storage capacity of this type of material is low, and in the reaction with hydrogen, disproportionation and decomposition or crystal structure amorphization will occur, resulting in too low reversible capacity and limited application.

Method used

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  • A kind of yttrium-iron-based alloy material, preparation method and application
  • A kind of yttrium-iron-based alloy material, preparation method and application
  • A kind of yttrium-iron-based alloy material, preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Put yttrium block, iron block and aluminum block (purity not less than 99wt.%) according to molecular formula YFe 1.5 al 0.3 , that is, yttrium block, iron block and aluminum block are mixed evenly according to the mass fraction of 49.18%, 46.34% and 4.48%, and melted in an electric arc melting furnace at 1400 ° C for 5 minutes, and the alloy ingot is obtained after cooling; the vacuum chamber of the electric arc melting furnace The vacuum is 1.0x10 -3 Pa.

[0039] (2) Turn over the alloy ingot obtained in step (1), and re-melt and cool, so that the smelting is repeated 5 times. The re-melting is carried out in an electric arc melting furnace, and the vacuum degree in the vacuum chamber of the arc melting furnace is 1.0x10 -3 Pa, temperature and time are the same as step (1). The obtained ingot is placed in an argon protective atmosphere at a temperature of 22-25°C.

[0040] (3) Crushing the ingot into a powder state in an argon protective atmosphere to obtain ...

Embodiment 2

[0044] (1) Put yttrium block, iron block and aluminum block (purity not less than 99wt.%) according to molecular formula YFe 1.5 Al 0.4 , that is, the yttrium block, the iron block and the aluminum block are uniformly mixed according to the mass fraction of 48.46%, 45.66% and 5.88%, melted in an electric arc melting furnace at 1400 ° C for 5 minutes, and the alloy ingot is obtained after cooling;

[0045] (2) Turn over the alloy ingot obtained in step (1), and re-melt and cool, so that the smelting is repeated 5 times. The re-melting is carried out in an electric arc melting furnace, and the vacuum degree in the vacuum chamber of the arc melting furnace is 1.0x10 -3 Pa, temperature and time are the same as step (1). The obtained ingot is placed in an argon protective atmosphere at a temperature of 22-25°C.

[0046] (3) Crushing the ingot into a powder state in an argon protective atmosphere to obtain a yttrium-iron-aluminum alloy hydrogen storage material with uniform compo...

Embodiment 3

[0049] (1) Put yttrium block, iron block and aluminum block (purity not less than 99wt.%) according to molecular formula YFe 1.5 Al 0.5 , that is, yttrium block, iron block and aluminum block are mixed uniformly according to the mass fraction of 47.76%, 45% and 7.24%, and melted in an electric arc melting furnace at 1400 ° C for 5 minutes, and the alloy ingot is obtained after cooling; the vacuum chamber of the electric arc melting furnace The vacuum is 1.0x10 -3 Pa.

[0050] (2) Turn over the alloy ingot obtained in step (1), and re-melt and cool, so that the smelting is repeated 5 times. The remelting is carried out in an electric arc melting furnace, and the vacuum degree in the vacuum chamber of the arc melting furnace is 1.0x10 -3 Pa, temperature and time are the same as step (1). The obtained ingot is placed in an argon protective atmosphere at a temperature of 22-25°C.

[0051] (3) Crushing the ingot into a powder state in an argon protective atmosphere to obtain a...

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Abstract

The invention discloses an yttrium-iron-based alloy material. The general chemical formula is YFexMy. M is one or more of the metal aluminum or manganese or cobalt elements, and 1<=x<=2, 0<=y<=1.2, and 1.8<=x+y<=2.2. The invention further discloses a preparation method for the yttrium-iron-based alloy material, metal block materials of yttrium, iron and the metal M are mixed, and smelting is conducted at the temperature of 1300-1500 DEG C for 3-10 minutes. The yttrium-iron-based alloy material can absorb hydrogen fast at the room temperature, and the hydrogen storage capacity reaches 1.0-1.8 wt.%. In addition, the reversible hydrogen absorption-desorption properties are excellent, the crystal structure is kept unchanged after repeated hydrogen absorption-desorption cycles, disproportion decomposition does not occur, and the hydrogen storage capacity conservation rate is high.

Description

technical field [0001] The invention relates to the field of hydrogen storage alloy materials, in particular to a yttrium-iron-based alloy material, a preparation method and an application. Background technique [0002] my country is a big country with rare earth resources, and its reserves account for more than 50% of the world's total. However, there is a serious imbalance in the effective utilization of rare earth resources. At present, the application of rare earths is mainly concentrated in the fields of magnetism, fluorescence, ceramics, glass, hydrogen storage, metallurgy and so on. Among them, magnetism and fluorescence are the two largest application areas, accounting for nearly 70% of rare earth applications, and determining the development of the rare earth industry. The fluorescent materials mainly use Eu and Tb, and the magnetic materials mainly use Nd, Pr, Dy, Gd, Tb, Sm and other rare earth elements. However, most of the rare earth materials are light rare ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C30/00
CPCC22C1/02C22C28/00C22C30/00
Inventor 朱敏黎子鸣王辉欧阳柳章
Owner SOUTH CHINA UNIV OF TECH
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