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Ta-based hydrogen permeable alloy doped with special elements and preparation method thereof

A kind of element doping, special technology, applied in the field of Ta-based hydrogen permeation alloy and its preparation, can solve the problems of inapplicability, serious hydrogen embrittlement, high price, etc.

Active Publication Date: 2018-12-04
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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  • Ta-based hydrogen permeable alloy doped with special elements and preparation method thereof

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Effect test

Embodiment 1

[0033] Example 1: A Ta-based crystalline hydrogen permeable alloy doped with a special element, whose composition formula is Ta 46 Zr 25 Ni 24 W 5 . The alloy sample of the present invention is prepared by vacuum arc melting method, and the purity of the raw materials used are all 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 1000A, 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 h...

Embodiment 2

[0034] Example 2: A Ta-based crystalline hydrogen permeable alloy doped with a special element, whose composition formula is Ta 46 Zr 20 Ni 20 (MoY) 10 . The alloy sample of the present invention is prepared by vacuum arc melting method, and the purity of the raw materials used are all 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 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 12 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 maint...

Embodiment 3

[0035] Example 3: A Ta-based crystalline hydrogen permeable alloy doped with a special element, whose composition formula is Ta 56 Zr 14 Ni 10 (CrSi) 20 . The alloy sample of the present invention is prepared by vacuum arc melting method, and the purity of the raw materials used are all 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 5.5×10 -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 23g. The smelting process of an alloy sample was repeated 12 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 ma...

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Abstract

The present invention provides a Ta-based hydrogen permeable alloy doped with special elements and a preparation method thereof, the general chemical formula of which is Ta100-(x+y+z)MxNyPz, wherein M is one of Ti, Zr and Hf Or more than one element; N is one or more elements of Ni or Co; P is Cr, Fe, Cu, Al, Y, Mo, Ru, Rh, W, Sn, Si, Mn, Zn One or more of these special elements such as Mg, 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 Ta-based hydrogen permeable alloy doped with special elements 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;...

Claims

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Application Information

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