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Rare earth doped high-performance Nb-based hydrogen permeation alloy and preparation method thereof

A rare earth doping, high-performance technology, applied in metal material coating process, ion implantation plating, coating, etc., can solve the problems of unapplicable, serious hydrogen embrittlement, scarce palladium resources, etc.

Active Publication Date: 2017-06-13
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 high-performance Nb-based hydrogen permeation alloy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034]Example 1: A rare earth-doped Nb-based crystalline hydrogen permeable alloy, whose composition formula is Nb 40 Zr 25 co 25 (YSm) 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 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 maintain a...

Embodiment 2

[0035] Example 2: A rare earth-doped Nb-based crystalline hydrogen permeable alloy, whose composition formula is Nb 48 f 21 Ni 19 (DyPr) 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 6×10 -3 Pa, the melting current is 1150A, 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 20g. The melting 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 a hig...

Embodiment 3

[0036] Example 3: A rare earth-doped Nb-based crystalline hydrogen permeable alloy, the composition formula of which is Nb 40 Zr 26 co 24 (ScGd) 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 4.5×10 -3 Pa, the melting current is 1150A, 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 mai...

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Abstract

The present invention provides a rare earth doped high-performance Nb-based hydrogen permeation alloy and a preparation method thereof, wherein the chemical general formula is Nb100-(x+y+z)MxNyPz, M is one or a plurality of elements selected from Ti, Zr and Hf, N is one or a plurality of elements selected from Ni and Co, P is one or a plurality of rare elements selected from La, Ce, Pr, Sm, Nd, Eu, Gd, Tb, Dy, Ho, Er, Sc, and Y, x is more than or equal to 10 and is less than or equal to 30, y is more than or equal to 10 and is less than or equal to 30, z is more than or equal to 5 and is less than or equal to 20, and x, y and z are mole percentages. The preparation method comprises: cutting the raw materials, and cleaning the surfaces of the raw material; and calculating the raw material components, weighing the raw materials, and carrying out electrical arc smelting to obtain the alloy ingot. According to the present invention, the hydrogen permeation alloy film material added with various rare earth elements and having good hydrogen permeation and good hydrogen embrittlement resistance is provided by using the vacuum electrical arc smelting method.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a high-performance Nb-based hydrogen permeable alloy doped with rare earth 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 obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/02C22C30/00C22C1/02C22B9/20C23C14/35C23C14/16C23C14/02
CPCC22B9/006C22B9/20C22C1/02C22C1/023C22C27/02C22C30/00C23C14/028C23C14/16C23C14/35
Inventor 石锋
Owner SHANDONG UNIV OF SCI & TECH