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High-performance V-based hydrogen-permeable alloy doped with special elements and preparation method

An element doping, high-performance technology, applied in the field of alloy materials, can solve problems such as unapplicable, expensive, and serious hydrogen embrittlement

Active Publication Date: 2017-07-04
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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  • High-performance V-based hydrogen-permeable alloy doped with special elements and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: A high-performance V-based crystalline hydrogen permeable alloy doped with special elements, the composition formula of which is V 49 Ti 28 Ni 18 Al 5 . The alloy samples of the present invention are prepared by a vacuum arc melting method, and the purity of the raw materials used is greater than 99.9%. Arc smelting is carried out under the protection of argon, cooled by a water-cooled copper crucible, and the vacuum is 3×10 -3 Pa, smelting current 1200A, arc ignition method is high frequency arc ignition, smelting crucible cooling method is water jacket cooling (magnetic stirring), the weight of the prepared button ingot sample is 25g. The melting process of an alloy sample should be repeated 10 times, and the ingot should be turned over for each repetition. A pure titanium ingot is placed inside the furnace, and the pure titanium ingot must be smelted before each alloy ingot is smelted to absorb a small amount of residual oxygen in the furnace and maintain a...

Embodiment 2

[0032] Example 2: A high-performance V-based crystalline hydrogen permeation alloy doped with special elements, the composition formula of which is V 49 Ti 13 Ni 13 (CuSi) 10 . The alloy samples of the present invention are prepared by a 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, cooled by a water-cooled copper crucible, and the vacuum degree is 6×10 -3 Pa, smelting current 1150A, arc ignition method is high frequency arc ignition, smelting crucible cooling method is water jacket cooling (magnetic stirring), the weight of the button ingot sample is 20g. The melting process of an alloy sample should be repeated 10 times, and the ingot should be turned over each time it is repeated. A pure titanium ingot is placed inside the furnace, and the pure titanium ingot must be smelted before each alloy ingot is smelted to absorb a small amount of residual oxygen in the furnace and ma...

Embodiment 3

[0033] Example 3: A high-performance V-based crystalline hydrogen permeable alloy doped with special elements, the composition formula of which is V 49 Ti 22 Ni 14 (SnWMo) 15 . The alloy samples of the present invention are prepared by a vacuum arc melting method, and the purity of the raw materials used is greater than 99.9%. Arc smelting is carried out under the protection of argon gas, cooled by a water-cooled copper crucible, and the vacuum degree is 3.9×10 -3 Pa, smelting current 1100A, arc ignition method is high frequency arc ignition, smelting crucible cooling method is water jacket cooling (magnetic stirring), the weight of the produced button ingot sample is 23g. The melting process of an alloy sample should be repeated 10 times, and the ingot should be turned over for each repetition. A pure titanium ingot is placed inside the furnace, and the pure titanium ingot must be smelted before each alloy ingot is smelted to absorb a small amount of residual oxygen in the fur...

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Abstract

The invention provides a high-performance V-shaped hydrogen-permeable alloy doped with special elements and a preparation method. The general chemical formula is V100-(x+y+z)MxNyPz, wherein M is one or more elements of Ti, Zr and Hf, N is one or more elements of Ni and Co, P is one or more elements of Cr, Fe, Cu, Al, Y, Mo, Ru, Rh, W, Si, Mn, Sn, Zn and Mg, x is larger than or equal to 10 and smaller than or equal to 30, y is larger than or equal to 10 and smaller than and equal to 30, z is larger than or equal to 5 and smaller than or equal to 20, and x, y and z are mole percents. The preparation method comprises the steps that raw materials are cut, the surfaces of the raw materials are cleaned, raw material ingredients are calculated, the raw materials are weighed, and electric arc melting is carried out. The hydrogen-permeable alloy film material with good hydrogen permeation and hydrogen brittleness resistance doped with special elements 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 high-performance V-based hydrogen permeable alloy doped with special elements and a preparation method. Background technique [0002] Hydrogen energy has the advantages of high efficiency, cleanliness, renewable, abundant reserves, wide sources, and high energy density. It has broad application prospects in many fields such as semiconductors, fine chemicals, aerospace, and fuel cells. It is an ideal secondary energy source. To become a pivotal 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. There are many sources of hydrogen. In addition to the 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 one of the effective ways to obtain ...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C27/02C22C1/02
CPCC22C1/02C22C27/025C22C30/00
Inventor 石锋
Owner SHANDONG UNIV OF SCI & TECH