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Aluminum-gallium alloy and preparation method thereof

A technology of aluminum-gallium alloy and aluminum alloy, which is applied in the field of alloy and its preparation, can solve problems such as uneconomical, large proportion of metal gallium, complicated process, etc., and achieve the goal of eliminating subsequent processing steps, simple preparation process, and reduced cost Effect

Inactive Publication Date: 2013-08-07
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, people usually use methods such as powder metallurgy, vacuum heating furnace smelting, foam metallurgy, etc. to prepare aluminum-gallium alloys. Not only the process is complicated, but also the proportion of metal gallium used is too large, so the cost is high and it is not very economical.

Method used

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  • Aluminum-gallium alloy and preparation method thereof
  • Aluminum-gallium alloy and preparation method thereof
  • Aluminum-gallium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 60g of gallium metal and put it in a closed flask, put the closed flask into a water bath and heat it to 50°C to melt the gallium metal in the bottle into a liquid state, and keep the temperature for later use. Take a square industrial-grade pure aluminum sheet with a length of 50 mm, a width of 50 mm, and a thickness of 2 mm. Under the protection of an argon medium, use a diamond blade to remove the surface oxide film. Continue to pour the above-mentioned liquid gallium on the surface of the exposed pure aluminum substrate under the protection of argon, and the coverage ratio is 30% of the surface area of ​​the exposed pure aluminum substrate. Put the aluminum sheet covered with metal gallium into a vacuum heating furnace, and keep it warm at 50°C for 10 minutes to obtain an aluminum-gallium alloy.

[0024] figure 1 Shown is the 60-fold scanning electron microscope image of the cross-section of the prepared aluminum-gallium alloy. The vertical line in the figure ...

Embodiment 2

[0026] Take 60g of gallium metal and put it in a closed flask, put the closed flask into a water bath and heat it to 100°C to melt the gallium metal in the bottle to a liquid state, and keep the temperature for later use. Take a square metal aluminum sheet with a length of 50 mm, a width of 50 mm, and a thickness of 3 mm. Under the protection of a nitrogen medium, use a diamond blade to remove the surface oxide film. Continue to pour the above-mentioned liquid gallium on the surface of the exposed pure aluminum substrate under the protection of nitrogen, and the coverage ratio is 50% of the surface area of ​​the exposed pure aluminum substrate. Put the aluminum sheet covered with metal gallium into a vacuum heating furnace and keep it warm at 100°C for 20 minutes to obtain an aluminum-gallium alloy.

[0027] Figure 4 Shown is the 35-fold scanning electron microscope image of the fabricated aluminum-gallium alloy cross-section. The vertical line in the figure is the dividing ...

Embodiment 3

[0029] Take 60g of gallium metal and put it in a closed flask, put the closed flask into a water bath and heat it to 50°C to melt the gallium metal in the bottle into a liquid state, and keep the temperature for later use. Take a square industrial-grade pure aluminum sheet with a length of 50 mm, a width of 50 mm, and a thickness of 0.1 mm. Under the protection of an argon medium, use a diamond blade to remove the surface oxide film. Continue to pour the above-mentioned liquid gallium on the surface of the exposed pure aluminum substrate under the protection of argon, and the coverage ratio is 10% of the surface area of ​​the exposed pure aluminum substrate. Put the aluminum sheet covered with metal gallium into a vacuum heating furnace and keep it warm at 50°C for 20 minutes to obtain an aluminum-gallium alloy.

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Abstract

The invention relates to an aluminum-gallium alloy and a preparation method thereof, wherein the aluminum-gallium alloy is a two-phase structure, and a metal gallium is distributed along an aluminum alloy grain boundary to form the two-phase structure. The aluminum-gallium alloy preparation method comprises: placing a metal gallium into a sealed flask, placing the sealed flask into a water bath kettle to heat to a temperature of 50 DEG C so as to melt the metal gallium in the flask to achieve a liquid state, and maintaining a constant temperature to be spare; taking a metal aluminum, and adopting a mechanical scraping method to remove a surface oxidation film under protection of an inert gas such as an argon gas medium so as to expose a pure aluminum substrate; and covering the liquid state gallium on the surface of the exposed pure aluminum substrate continuously under the protection of the inert gas, then placing into a vacuum heating furnace, and carrying out heat preservation for 10-60 min at a temperature of 50-200 DEG C to prepare the aluminum-gallium alloy, wherein a thickness of the thinnest region of the coating is 1-10 mm. According to the present invention, the process is simple, the aluminum material is not subjected to excess processing, the amount of the metal gallium is significantly reduced, the cost is reduced, the prepared aluminum-gallium alloy has good stability in dry air, and can rapidly react with water to produce a large number of hydrogen, and strong economy is provided.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to an alloy and a preparation method thereof. Background technique [0002] Today, when the global warming effect is becoming more and more serious, people's demand for clean energy is becoming more and more urgent, and the combustion of hydrogen can not only generate enough energy, but also produce water that does not pollute the air. Therefore, hydrogen is a It is a very ideal clean energy, but due to the high cost of hydrogen preparation and the problems of storage and transportation, it has not been widely used. According to the reaction formula Al+H 2 O→Al 2 o 3 +H 2 , the reaction of aluminum and water can be used to prepare hydrogen that meets the requirements, and aluminum is cheap and easy to transport, but the aluminum oxide film on the surface of aluminum will hinder the contact between aluminum and water, so that the above reaction cannot be carried out normally. For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/00
Inventor 付瑞东程凯
Owner YANSHAN UNIV
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