Aluminum-lithium-samarium alloy and fused salt electrolysis preparation method thereof

A molten salt electrolysis and alloy technology, applied in the field of alloys, can solve the problems of harsh preparation conditions and high equipment requirements, and achieve the effects of reducing production costs, simple process and shortening production process.

Inactive Publication Date: 2012-03-14
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This method can realize mass production of samarium metal, but at the same time, it requires high equipment and preparation conditions. We hope to develop a method to directly electrolyze samarium alloy in molten salt

Method used

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  • Aluminum-lithium-samarium alloy and fused salt electrolysis preparation method thereof
  • Aluminum-lithium-samarium alloy and fused salt electrolysis preparation method thereof
  • Aluminum-lithium-samarium alloy and fused salt electrolysis preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1: In the electrolytic furnace, using LiCl+KCl as the electrolyte system, heated to 630 ° C to melt, and Sm 2 o 3 Powder and AlCl 3After mixing evenly, press it into tablets, and add it to the molten salt in the form of granules at one time. The mass ratio of each electrolyte in the system is AlCl 3 :LiCl:KCl=6.2%:46.9%:46.9%, Sm 2 o 3 The amount of addition is 1% of the weight of molten salt, with inert metal molybdenum (Mo) as the cathode, graphite as the anode, the electrolysis temperature is 630 ° C, and the cathode current density is 6.4A / cm 2 , anode current density 0.5A / cm 2 , after 120 minutes of electrolysis, the Al-Li-Sm alloy was deposited near the cathode of the molten salt electrolytic cell. The contents of aluminum, lithium, and samarium in the alloy are 20.9%, 68.2%, and 10.9%, respectively.

Embodiment 2

[0029] Example 2: In the electrolytic furnace, use LiCl+KCl as the electrolyte system, heat to 630 ° C to melt, and Sm 2 o 3 Powder and AlCl 3 After mixing evenly, press it into tablets, and add it to the molten salt in the form of granules at one time. The mass ratio of each electrolyte in the system is AlCl 3 :LiCl:KCl=7.2%:46.4%:46.4%, Sm 2 o 3 The addition amount is 1% of the molten salt weight, with the inert metal molybdenum (Mo) as the cathode, graphite as the anode, the electrolysis temperature is 660 ° C, and the cathode current density is 6.4A / cm 2 , anode current density 0.5A / cm 2 , after 120 minutes of electrolysis, the Al-Li-Sm alloy was deposited near the cathode of the molten salt electrolytic cell. The contents of aluminum, lithium, and samarium in the alloy are 26.8%, 31.6%, and 41.6%, respectively.

Embodiment 3

[0030] Example 3: In the electrolytic furnace, using LiCl+KCl as the electrolyte system, heated to 630 ° C to melt, the Sm 2 o 3 Powder and AlCl 3 After mixing evenly, press it into tablets, and add it to the molten salt in the form of granules at one time. The mass ratio of each electrolyte in the system is AlCl 3 : LiCl: KCl=9.0%: 45.5%: 45.5%, Sm 2 o 3 The addition amount is 1% of the molten salt weight, with the inert metal molybdenum (Mo) as the cathode, graphite as the anode, the electrolysis temperature is 720 ° C, and the cathode current density is 6.4A / cm 2 , anode current density 0.5A / cm 2 After 120 minutes of electrolysis, an Al-Li-Sm alloy was deposited near the cathode of the molten salt electrolytic cell. The contents of aluminum, lithium, and samarium in the alloy were 71.4%, 2.4%, and 26.2%, respectively. .

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Abstract

The invention provides an aluminum-lithium-samarium alloy and a fused salt electrolysis preparation method thereof. The aluminum-lithium-samarium alloy is prepared by the following steps of: heating LiCl and KCl serving as an electrolyte system to 630 DEG C for fusion in an electrolytic furnace; uniformly mixing Sm2O3 powder and AlCl3 and tabletting the mixture, adding the mixture into fused saltin the form of grains to ensure that the mass ratio of the AlCl3, LiCl to KCl is 6.2-11.0 percent to 44.5-46.9 percent to 44.5-46.9 percent, wherein the amount of the added Sm2O3 is 1 percent of the weight of the electrolytic fused salt; and taking metal molybdenum as a cathode and graphite as an anode and performing electrolysis for 2 to 6 hours to deposit the Al-Li-Sm alloy close to the cathodeof the fused salt electrolysis cell, wherein the electrolysis temperature is between 630 and 720 DEG C, the cathode current density is 6.4A / cm<2> and the anode current density is 0.5A / cm<2>. By completely using metal compounds as raw materials and adding aluminum chloride, the chlorination of samarium oxide is realized and the aluminum-lithium-samarium alloys of different components are obtained by controlling the conditions such as the proportion of the electrolytes, the electrolysis time, the temperature, the current density and the like. The alloy and the method have the advantages of simple whole process, low requirements on equipment, low energy consumption and low pollution.

Description

technical field [0001] This invention relates to alloys. The invention also relates to a method for preparing the alloy. Specifically, it is an aluminum-lithium-samarium alloy and a preparation method thereof. Background technique [0002] Adding metal element lithium (Li) to aluminum alloy can increase the elastic modulus of the alloy while reducing the density of the alloy. Therefore, aluminum-lithium alloy is used as a low density, high elastic modulus, high specific strength and high specific stiffness Aluminum alloys have shown broad application prospects in the aerospace field. Rare earth metals have extremely high chemical activity, and when added to aluminum and aluminum alloys, they have dual functions of impurity removal and modification: because rare earth elements are active, they can form stable high-melting point intermetallic compounds with many elements in the form of a network or a skeleton Distributed in grain boundaries and dendrites; adding rare earths...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C24/00C22C30/00C25C3/36
Inventor 张密林韩伟田阳刘金峰王凤丽李梅颜永得
Owner HARBIN ENG UNIV
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