Ti-Cr-V solid solution alloy with high weight of hydrogen and low V content

A solid solution and hydrogen storage technology, applied in the field of Ti-Cr-V solid solution alloy, can solve the problems of complex optimization selection, high alloy cost, increased processing cost, etc., to improve hydrogen storage capacity, simplify preparation process, and reduce material cost. Effect

Inactive Publication Date: 2008-01-23
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the practical V-based solid solution hydrogen storage alloys, most of them contain multiple components, so there are the following shortcomings: ① The optimization of the components of the multi-component system is very complicated, and it mainly depends on a large number of experiments at present; ② It has high hydrogen storage High-performance solid solution alloys have high V content, and the cost of the alloy is too high; ③ Alloys with low V content must be post-treated by high-temperature annealing to form a solid solution structure, resulting in increased processing costs

Method used

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  • Ti-Cr-V solid solution alloy with high weight of hydrogen and low V content
  • Ti-Cr-V solid solution alloy with high weight of hydrogen and low V content

Examples

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Effect test

Embodiment 1

[0030] Embodiment one, Ti 48.5 Cr 46.5 V 5 Preparation of Solid Solution Alloy and Its Hydrogen Storage Properties

[0031] Ti 48.5 Cr 46.5 V 5 Alloy composition converted to design composition weight percentage Ti 46.5 Cr 48.4 V 5.1 , Weigh the raw materials of pure metal Ti, Cr and V with a purity of 99.9% according to this ratio; Turn it over and smelt it repeatedly at least 3 times to obtain an alloy ingot with uniform composition; then use the copper mold suction casting method to obtain an alloy rod with a diameter of 3mm; use an X-ray diffractometer (Cu Kα radiation, its wavelength λ=0.15406nm) to analyze the alloy The phase structure of the rod was confirmed to be the solid solution structure of BCC-V; the alloy rod was mechanically ground into powder with a particle size of less than 300 μm, the sample was placed in a stainless steel reaction vessel, and it was activated with P-C-T hydrogen absorption and desorption test equipment. Vacuum at K for 30 minutes,...

Embodiment 2

[0032] Embodiment two, Ti 45 Cr 52.5 V 2.5 Preparation of Solid Solution Alloy and Its Hydrogen Storage Properties

[0033] Ti 45 Cr 52.5 V 2.5 Alloy composition converted to design composition weight percentage Ti 43 Cr 54.5 V 2.5 , weigh the raw material of 99.9% pure metal Ti with a purity of 99.9%, Cr and V in this ratio; then adopt non-consumable arc melting and copper mold suction casting, the method is the same as that of Example 1; analyze the alloy bar with X-ray diffractometer The phase structure of BCC-V is confirmed as the solid solution structure of BCC-V; the activation treatment and hydrogen absorption and desorption behavior test steps are the same as in Example 1 with P-C-T hydrogen absorption and desorption test equipment, and the maximum hydrogen storage capacity of the alloy measured is 2.7 wt.%.

Embodiment 3

[0034] Embodiment three, Ti 43.8 Cr 51.2 V 5 Preparation of Solid Solution Alloy and Its Hydrogen Storage Properties

[0035] Ti 43.8 Cr 51.2 V 5 Alloy composition converted to design composition weight percentage Ti 41.9 Cr 53 V 5.1 , weigh the raw material of 99.9% pure metal Ti with a purity of 99.9%, Cr and V in this ratio; then adopt non-consumable arc melting and copper mold suction casting, the method is the same as that of Example 1; analyze the alloy bar with X-ray diffractometer The phase structure of BCC-V is confirmed as the solid solution structure of BCC-V; the activation treatment and hydrogen absorption and desorption behavior test steps are the same as in Example 1 with P-C-T hydrogen absorption and desorption test equipment, and the maximum hydrogen storage capacity of the alloy measured is 3.2 wt.%.

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Abstract

The invention relates to a Ti-Cr-V solid solution alloy with high hydrogen storage capacity as well as low V content, which belongs to the new material field. The invention comprises a Ti element, a Cr element and a V element and is characterized in that the alloy is formed by the alloying of the a binary cluster Cr7Ti6 and the nearby composite by adding few V; the composite scope is (TiCry)(100 minus x)/(1 plus y)Vx, that is, V atom per centage scope x is equal to 2 minus 10at. per cent, and Cr/Ti atom per centage scope y is equal to 0.96 minus 1.44; the maximum hydrogen absorption capacity of the solid solution alloy Ti43.8Cr51.2V5 and Ti42.9Cr50V7.1 with maximum hydrogen uptake is 3.2wt. per cent (313K), which processes good hydriding and dehydriding kinetics performance; the solid solution alloy with low V content is processed by adopting the vacuum arc melting and the water-cooled copper mold method. The invention has the advantages that the invention defines the composite range of the low V content in accordance with the cluster, which overcomes the arbitrary composite selection. By adoption of the water-cooled copper mold method, the invention ensures the alloy is the V solid solution alloy structure with low V content, and simplies the process preparation; the invention is capable of replacing the solid solution alloy with V content, lowers the material cost and is capable of being used as fuel cell hydrogen source alloy.

Description

technical field [0001] The invention relates to a Ti-Cr-V solid solution alloy with high hydrogen storage capacity, good hydrogen absorption and desorption kinetic performance and low V content, belonging to the technical field of hydrogen storage energy materials. Background technique [0002] The development and application of hydrogen storage materials have promoted the development and utilization of clean energy-hydrogen energy, among which hydrogen storage alloys with practical value have become a hot spot in the research of cutting-edge energy materials in recent years. The activation properties, kinetic properties, cycle stability, and hydrogen storage capacity of hydrogen storage alloys are closely related to the microstructure of the alloy itself. Therefore, different types of hydrogen storage alloys have different hydrogen absorption and desorption capacities. V-based alloys are a type of hydrogen storage alloys with high hydrogen storage capacity, good kinetic pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/06C22C1/02B22D18/00
Inventor 董闯王清汪海斌
Owner DALIAN UNIV OF TECH
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