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Method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis

An aluminum-copper alloy and molten salt electrolysis technology, applied in the field of aluminum-copper alloy preparation, can solve the problems of complex preparation process, high energy consumption, and easy segregation of alloy components, and achieve simple production process, low energy consumption and high production cost Effect

Active Publication Date: 2017-08-25
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main method of traditional preparation of aluminum-copper alloy is the mechanical mixing method, which has problems such as complex preparation process, high energy consumption, and easy segregation of the prepared alloy composition.

Method used

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  • Method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis
  • Method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis
  • Method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis

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Embodiment 1

[0021] A method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis, which uses metallic copper as the cathode, a spectrally pure graphite rod as the anode (the distance between the cathode and the anode is 3cm), and Pt wire as the reference electrode, containing AlCl 3 The LiCl-KCl molten salt system is the electrolyte (mix LiCl and KCl with a mass ratio of 44.41 : 55.59 in the electrolytic cell, heat and melt, and then add 2% AlCl 3 Mix well, namely LiCl, KCl, AlCl 3 The mass ratio is 44.41: 55.59 : 2), the electrolytic cell temperature is controlled at 375°C under an argon atmosphere, and the copper cathode potential is -1.57V relative to the Pt wire reference electrode for 1 hour, and metal aluminum is deposited on the copper cathode It precipitates on the copper cathode and continues to diffuse into the copper cathode to form Al 4 Cu 9 phase aluminum-copper alloy. The XRD collection of illustrative plates and SEM collectio...

Embodiment 2

[0023] A method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis, which uses metallic copper as the cathode, a spectrally pure graphite rod as the anode (the distance between the cathode and the anode is 3cm), and Pt wire as the reference electrode, containing AlCl 3 The LiCl-KCl molten salt system is the electrolyte (mix LiCl and KCl with a mass ratio of 44.41 : 55.59 in the electrolytic cell, heat and melt, and then add 2% AlCl 3 Mix evenly to obtain), under the condition of controlling the temperature of the electrolytic cell at 375°C and the potential of the copper cathode relative to the Pt wire reference electrode at -1.67V for 1 hour under an argon atmosphere, metal aluminum precipitates on the copper cathode and continues to Diffusion inside the copper cathode forms AlCu and Al 4 Cu 9 Aluminum-copper alloys that coexist. The XRD collection of illustrative plates and SEM collection of illustrative plates of gained prod...

Embodiment 3

[0025] A method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis, which uses metallic copper as the cathode, a spectrally pure graphite rod as the anode (the distance between the cathode and the anode is 3cm), and Pt wire as the reference electrode, containing AlCl 3 The LiCl-KCl molten salt system is the electrolyte (mix LiCl and KCl with a mass ratio of 44.41 : 55.59 in the electrolytic cell, heat and melt, and then add 2% AlCl 3 Mix evenly to obtain), under the condition of controlling the temperature of the electrolytic cell at 375°C and the potential of the copper cathode relative to the Pt wire reference electrode at -1.72V for 1 hour under an argon atmosphere, metal aluminum precipitates on the copper cathode and continues to Diffusion inside the copper cathode forms Al 2 Cu and AlCu, Al 4 Cu 9 Aluminum-copper alloy with phase coexistence. The XRD collection of illustrative plates and SEM collection of illustrative pl...

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Abstract

The invention discloses a method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis, which uses metallic copper as a cathode, a graphite rod as an anode, a Pt wire as a reference electrode, and a LiCl-KCl molten salt system containing AlCl3 as an electrolyte , Electrodeposition is carried out under an argon atmosphere. By controlling the cathode potential of electrodeposition, metal aluminum is precipitated on the copper cathode and continues to diffuse into the copper cathode to form an aluminum-copper alloy with different phase compositions. The invention has the advantages of simple production process, short process and low energy consumption, and can prepare aluminum-copper alloys with different phase compositions by controlling the parameters of the electrodeposition process, so as to meet the requirements of different aluminum-copper alloy components in the industrial field.

Description

technical field [0001] The invention belongs to the technical field of aluminum-copper alloy preparation, and in particular relates to a method for preparing aluminum-copper alloys with different phase compositions by molten salt electrolysis. Background technique [0002] Aluminum alloy has the characteristics of low density, high specific strength, good toughness, hot workability and corrosion resistance, and is widely used in aerospace and other fields. Cu can produce great solid solution strengthening and aging strengthening in aluminum alloys, which can improve the fluidity, elongation, cyclic strain fatigue resistance and fracture toughness of aluminum alloys, and reduce the crack growth rate of alloys in corrosive media. Copper alloys are widely used in aircraft manufacturing, machinery manufacturing, power electronics, automobile manufacturing and other industries. [0003] Traditionally, the main method for preparing aluminum-copper alloys is the mechanical pairing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/36
Inventor 陈增李胜军李伟张伟风
Owner HENAN UNIVERSITY