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Rare earth doped V base hydrogen permeation alloy and preparation method

A rare earth doping and alloying technology, applied in the field of alloy materials, can solve the problems of unapplicable, expensive, scarce palladium resources, etc.

Active Publication Date: 2017-07-07
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 base hydrogen permeation alloy and preparation method

Examples

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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 base hydrogen permeation alloy and a preparation method. The general chemical formula of the alloy is V100-(x+y+z)MxNyPz, wherein M is one or more elements in Ti, Zr and Hf; N is one or more elements in Ni and Co; and P is one or more elements in La, Ce, Pr, Sm, Nd, Eu, Gd, Tb, Dy, Ho, Er, Sc and Y, 10<=x<=30, 10<=y<=30, 5<=z<=20, and x, y and z are all mole percents. The preparation method of the alloy comprises the steps that a raw material is cut, and the surface of the raw material is cleaned; and components of the raw material are calculated, the raw material is weighed, and an alloy ingot is obtained through electric arc melting. A hydrogen permeation alloy film material which is added with various rare earth elements and has good hydrogen permeation performance and hydrogen embrittlement resistance is prepared through a vacuum electric arc melting method.

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