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Hydrogen permeation alloy material and preparation thereof

An alloy material and a hydrogen permeation technology are applied in the field of hydrogen permeable alloy materials and their preparation, which can solve problems such as incapability and achieve the effect of excellent hydrogen permeability.

Inactive Publication Date: 2009-07-08
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vanadium group metals (tantalum, niobium, vanadium) have very high hydrogen permeability, but are severely embrittled and cannot be used for hydrogen separation

Method used

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  • Hydrogen permeation alloy material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Preparation of Ti 26.9 Co 25.0 Ta 47.8 Alloy (mole percentage composition is 26.9mol% Ti, 25.0mol% Co, 47.8mol% Ta) material

[0023] The preparation method is as follows:

[0024] 1) Weigh out 0.054 mol of titanium (Ti) with a purity of 99%, 0.050 mol of cobalt (Co) with a purity of 99.5%, and 0.096 mol of tantalum (Ta) with a purity of 99.5%. The total mass of the metal raw materials is about 22.902 grams.

[0025] 2) Put the weighed tantalum, titanium, and cobalt raw materials into a non-consumable vacuum arc furnace and vacuumize to 3×10 -3 Below Pa, fill with high purity argon to 4×10 4 Pa, smelted into Ti 27 Co 25 Ta 48 alloy.

[0026] The alloy material includes 26.9mol% of titanium, 25.0mol% of cobalt and 47.8mol% of tantalum by mole percentage. The total content of titanium, cobalt and tantalum is 99.7mol%. Impurities include niobium (Nb) and nickel (Ni). , Silver (Ag). The alloy is composed of a BCC-(Ta, Ti) solid solution with a body-centered cubic con...

Embodiment 2

[0026] The alloy material includes 26.9mol% of titanium, 25.0mol% of cobalt and 47.8mol% of tantalum by mole percentage. The total content of titanium, cobalt and tantalum is 99.7mol%. Impurities include niobium (Nb) and nickel (Ni). , Silver (Ag). The alloy is composed of a BCC-(Ta, Ti) solid solution with a body-centered cubic configuration and a B2-TiCo metal compound, and is composed of a primary phase (Ta, Ti) and a eutectic phase {TiCo+(Ta, Ti)}. After palladium plating by magnetron sputtering, Ti is measured with a hydrogen permeability tester 27 Co 25 Ta 48 The hydrogen permeability of the alloy at 673K ​​is 2.8×10 -8 (mol H 2 m-1s -1 Pa -0.5 ), and has excellent resistance to hydrogen embrittlement. Example 2: Preparation of Ti 28.5 Co 26.9 Ta 43.6 Alloy (mole percentage composition is 28.5mol% Ti, 26.9mol% Co, 43.6mol% Ta) material

[0027] The preparation method is as follows:

[0028] 1) Weigh out 0.058 mol of titanium (Ti) with a purity of 99%, 0.054 mol of cobalt (Co...

Embodiment 3

[0031] Example 3: Preparation of Ti 28.9 Co 30.1 Ta 39.0 Alloy (mole percentage composition is 28.9mol% Ti, 30.1mol% Co, 39.0mol% Ta) material

[0032] The preparation method is as follows:

[0033] 1) Weigh out 0.075 mol of titanium (Ti) with a purity of 99%, 0.075 mol of cobalt (Co) with a purity of 99.5% and 0.100 mol of tantalum (Ta) with a purity of 99%. The total mass of the metal raw materials is about 26.105 grams.

[0034] 2) Put the weighed tantalum, titanium, and cobalt raw materials into a non-consumable vacuum arc furnace and vacuumize to 3×10 -3 Below Pa, fill with high purity argon to 4×10 4 Pa, smelted into Ti 30 Co 30 Ta 40 alloy.

[0035] The alloy material includes 28.9 mol% titanium, 30.1 mol% cobalt and 39.0 mol% tantalum by mole percentage. The total content of titanium, cobalt and tantalum is 98.0 mol%. Impurities include niobium (Nb) and nickel (Ni). , Copper (Cu), zinc (Zn), silver (Ag), silicon (Si). The alloy is composed of a BCC-(Ta, Ti) solid solution ...

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Abstract

The invention discloses a hydrogen permeating alloy material and a method for preparing the same, and the alloy comprises the following components by molar percentage: titanium of 23mol%-54mol%, cobalt of 21mol%-39mol% and tantalum, titanium, cobalt and tantalum of which the total content is of 98-100mol%.The manufacturing of the alloy material comprises steps of putting titanium, cobalt and tantalum with a purity of more than 99% into a non-consumable vacuum arc furnace, vacuumizing to a pressure below 3*10 3 Pa, filling in argon of high purity to a pressure of 4*10 Pa, and then smelting. The alloy material of the invention has the hydrogen permeability and excellent hydrogen brittleness resistance ability higher than pure palladium under 573-673K, while the cost of the alloy material is only about 1 / 100 of that of the pure palladium, thus, the alloy material can be used for hydrogen gas isolation and purification, and can also be used for a catalytic-reformed compact membrane reactor and the like.

Description

Technical field [0001] The invention relates to a hydrogen permeable alloy material and a preparation method thereof. Specifically, the invention relates to a titanium-cobalt-tantalum hydrogen permeable alloy material obtained by combining a tantalum-titanium solid solution and a titanium-cobalt metal compound and a preparation method thereof. technical background [0002] With the depletion of petroleum resources and the deterioration of the global climate, hydrogen energy and fuel cell technology are increasingly being valued by countries around the world. There is no elemental hydrogen in nature, and it needs to be produced by chemical methods such as electrolysis of water or catalytic reforming. On the one hand, the cost of producing hydrogen from electrolyzed water is too high. On the other hand, the above-mentioned process converts high-quality energy (electric energy) into low-quality energy (chemical energy), which does not conform to the principle of energy utilization. ...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
Inventor 罗伟民闫常峰胡蓉蓉
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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