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Rare earth-doped v-based hydrogen permeable alloy and preparation method thereof

A rare earth doping and alloying technology, applied in the field of alloy materials, can solve problems such as unapplicable, expensive, and serious hydrogen embrittlement

Active Publication Date: 2019-01-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, palladium resources are very scarce and expensive, and it is urgent to develop new metal membrane materials for hydrogen separation without palladium or less palladium that are inexpensive and highly permeable to hydrogen.
Research has found that 5B group metals (Nb, V, Ta) have a higher hydrogen permeability coefficient than palladium, but the cost is much lower than that of palladium alloys, and they are very promising hydrogen separation membrane materials. The hydrogen embrittlement caused in the process is very serious and cannot be applied in actual production; alloying is an effective way to solve the hazards of hydrogen embrittlement

Method used

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  • Rare earth-doped v-based hydrogen permeable alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: A V-based crystalline hydrogen permeable alloy doped with a special element, whose composition formula is V 40 Zr 25 Ni25 Nd 10 . The alloy sample of the present invention is prepared by vacuum arc melting method, and the purity of the raw materials used is greater than 99.9%. Arc melting is carried out under the protection of argon, and the water-cooled copper crucible is used for cooling, and the vacuum degree is 3×10 -3 Pa, the melting current is 1200A, the arc ignition method is high-frequency arc ignition, the melting crucible cooling method is water jacket cooling (magnetic stirring), and the button ingot sample weight is 20g. The smelting process of an alloy sample was repeated 10 times, and the ingot was turned over for each repetition. A pure titanium ingot is placed inside the furnace, and the pure titanium ingot must be smelted before the alloy ingot is smelted each time, so as to absorb a small amount of residual oxygen in the furnace and main...

Embodiment 2

[0034] Example 2: A V-based crystalline hydrogen permeable alloy doped with a special element, whose composition formula is V 46 Zr 26 Ni 23 sc 5 . The alloy sample of the present invention is prepared by vacuum arc melting method, and the purity of the raw materials used is greater than 99.9%. Arc melting is carried out under the protection of argon, and the water-cooled copper crucible is used for cooling, and the vacuum degree is 6×10 -3 Pa, the melting current is 800A, the arc ignition mode is high-frequency arc ignition, the melting crucible cooling mode is water jacket cooling (magnetic stirring), and the button ingot sample weight is 23g. The smelting process of an alloy sample was repeated 10 times, and the ingot was turned over for each repetition. A pure titanium ingot is placed inside the furnace, and the pure titanium ingot must be smelted before the alloy ingot is smelted each time, so as to absorb a small amount of residual oxygen in the furnace and maintain...

Embodiment 3

[0035] Example 3: A V-based crystalline hydrogen permeable alloy doped with a special element, whose composition formula is V 45 Zr 18 Ni 17 (DyHoSc) 20 . The alloy sample of the present invention is prepared by vacuum arc melting method, and the purity of the raw materials used is greater than 99.9%. Arc melting is carried out under the protection of argon, and the water-cooled copper crucible is used for cooling, and the vacuum degree is 3.5×10 -3 Pa, the melting current is 800A, the arc ignition mode is high-frequency arc ignition, the melting crucible cooling mode is water jacket cooling (magnetic stirring), and the button ingot sample weight is 25g. The smelting process of an alloy sample was repeated 10 times, and the ingot was turned over for each repetition. A pure titanium ingot is placed inside the furnace, and the pure titanium ingot must be smelted before the alloy ingot is smelted each time, so as to absorb a small amount of residual oxygen in the furnace and...

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Abstract

The invention provides a rare earth-doped V-based hydrogen permeable alloy and a preparation method thereof, whose general chemical formula is V100-(x+y+z)MxNyPz; wherein, M is one or one of Ti, Zr and Hf More than one element; N is one or more elements of Ni or Co; P is rare earth elements La, Ce, Pr, Sm, Nd, Eu, Gd, Tb, Dy, Ho, Er, Sc, Y One or more than one element, 10≤x≤30, 10≤y≤30, 5≤z≤20, x, y, and z are all mole percentages. The preparation method includes: cutting raw materials and cleaning the surface of the raw materials; calculating the composition of the raw materials, weighing the raw materials, and smelting into alloy ingots by electric arc. The invention uses a vacuum arc melting method to prepare a hydrogen permeable alloy film material with good hydrogen permeation and hydrogen embrittlement resistance properties added with various rare earth elements.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a rare earth-doped V-based hydrogen permeable alloy and a preparation method thereof. Background technique [0002] Hydrogen energy has the advantages of high efficiency, cleanness, regeneration, abundant reserves, wide sources, and high energy density. It has broad application prospects in semiconductors, fine chemicals, aerospace, fuel cells, and many other fields. It is an ideal secondary energy source. To become an important new energy system in the 21st century, many countries in the world are actively developing hydrogen energy, taking the development of hydrogen energy economy as a long-term goal. The source of hydrogen is very diverse. In addition to electrolysis of water to produce hydrogen, the extraction of hydrogen from industrial by-products (such as chlor-alkali, synthetic ammonia, coke oven gas, etc.) is also an effective way to obtain hydrogen; it is usual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/02C22C1/02
CPCC22C1/02C22C27/025
Inventor 石锋
Owner SHANDONG UNIV OF SCI & TECH
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