Magnesium-lithium-samarium alloy and preparation method thereof by fused salt electrolysis

A molten salt electrolysis and alloy technology, applied in the field of alloys, can solve the problems of difficult control of alloy composition, high price of metal magnesium, and high cost, and achieve the effects of low production cost, shortened production process, and low pollution.

Inactive Publication Date: 2008-10-15
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What this method uses is the metal magnesium with high price, and the cost is high
Moreover, the composition of the alloy is difficult to control, and there is segregation

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: with MgCl 2 +LiCl+KCl+KF is the electrolyte system, the mass percentage of each component is 6.0%, 44.5%, 44.5%, 5.0%, and then press MgCl 2 3.3% by weight added solid SmCl 3 Powder, with inert metal molybdenum (Mo) as the cathode and graphite as the anode, at an electrolysis temperature of 630°C, the sinking cathode method is adopted, the pole distance is 4cm, and the cathode current density is 9.5A / cm 2 , anode current density 0.5A / cm 2 , the cell voltage is 5.6-5.8V, after 40 minutes of electrolysis, Mg-Li-Sm alloy is deposited near the cathode in the molten salt electrolytic cell, and the contents of magnesium, lithium, and samarium are respectively: 43.3%, 56.4%, and 0.3%.

Embodiment 2

[0021] Embodiment 2: with MgCl 2 +LiCl+KCl+KF is the electrolyte system, the mass percentage of each component is 6.0%, 44.5%, 44.5%, 5.0%, and then press MgCl 2 3.3% by weight added solid SmCl 3 Powder, with inert metal molybdenum (Mo) as the cathode and graphite as the anode, at an electrolysis temperature of 660°C, the sinking cathode method is adopted, the pole distance is 4cm, and the cathode current density is 6.4A / cm 2 , anode current density 0.5A / cm 2 , the cell voltage is 5.0-5.3V, after 40 minutes of electrolysis, a Mg-Li-Sm alloy is deposited near the cathode in the molten salt electrolytic cell, and the contents of magnesium, lithium, and samarium are respectively: 59.6%, 39.5%, and 0.9%

Embodiment 3

[0022] Embodiment 3: with MgCl 2 +LiCl+KCl+KF is the electrolyte system, the mass percentage of each component is 6.0%, 44.5%, 44.5%, 5.0%, and then press MgCl 2 3.3% by weight added solid Sm 2 Cl 3 Powder, with the inert metal molybdenum (Mo) as the cathode and graphite as the anode, at an electrolysis temperature of 660°C, the sinking cathode method is adopted, the pole distance is 4cm, and the cathode current density is 12.7A / cm 2 , anode current density 0.5A / cm 2 , the cell voltage is 8.0-8.4V, after 40 minutes of electrolysis, Mg-Li-Sm alloy is deposited near the molten salt electrolytic cell and the cathode, and the contents of magnesium, lithium, and samarium are respectively: 45.5%, 54.0%, and 0.5%.

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Abstract

The invention provides a Mg Li -Samarium alloy and a method for preparing the same through fusion electrolysis. The method uses MgCl2+LiCl+KCl+KF as an electrolyte system in an electrolytic furnace, then adds anhydrous Sm2O3 powders to heat up to a melting temperature of 680 DEG C or anhydrous SmCl3 powders to heat up to a melting temperature of 630 DEG C, using metal molybdenum (Mo) as a cathode and graphite as an anode at an electrolysis temperature of between 630 and 810 DEG C, and adopts a sinking cathode method, in which a cathodic current density is 6.4 to16.0A / cm<2>,an anodic current density is 0.5A / cm<2> and a cell voltage is 5.1-8.4V, so as to deposit a Mg-Li-Sm alloy nearby the cathode in a fused-salt electrolysis cell after electrolyzing for 40 to 120 minutes. The method does not use metallic magnesium, metal lithium, or metallic samarium, but uses metal compound as raw materials to directly prepare the Mg-Li-Sm alloy through the fusion electrolysis method, thereby having the advantages of greatly shortening production flow and reducing the energy consumption and production cost due to the simple process with low temperature electrolysis.

Description

(1) Technical field [0001] The present invention relates to an alloy, specifically a magnesium-lithium-samarium alloy. The invention also relates to a preparation method of the magnesium lithium-samarium alloy. (2) Background technology [0002] Magnesium alloys have excellent properties such as low specific gravity, high specific strength, easy processing and recycling, as well as good damping and shock absorption and electromagnetic shielding properties, and are widely used in the automotive and aerospace industries. Among magnesium alloys, Mg-Li alloy is currently the lightest alloy, and the density of its binary alloy is only 1.3-1.59g / cm 3 , but its specific strength is much higher than that of aluminum alloy. The addition of Li to Mg not only reduces its density, but also greatly improves its processing performance, so it has attracted the attention of researchers and industries, and has been applied in the aerospace field. In addition to the characteristics of gene...

Claims

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Application Information

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IPC IPC(8): C22C23/00C25C3/36
Inventor 张密林韩伟田阳颜永得陈云涵
Owner HARBIN ENG UNIV
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