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A method of chemical dealloying to prepare Cu micro-nano sheet structure

A chemical dealloying and sheet-like structure technology, applied in the field of materials science and engineering, can solve the problems of difficult to realize the preparation of other complex metal micro-nano structures, limit the application of chemical dealloying method, etc., and achieve easy industrialized large-scale production and shorten the preparation time time and high efficiency

Active Publication Date: 2019-03-19
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional chemical dealloying method can only be used to prepare metal micro-nano porous structures, and it is difficult to realize the preparation of other complex metal micro-nano structures, which greatly limits the application of chemical dealloying methods.

Method used

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  • A method of chemical dealloying to prepare Cu micro-nano sheet structure
  • A method of chemical dealloying to prepare Cu micro-nano sheet structure
  • A method of chemical dealloying to prepare Cu micro-nano sheet structure

Examples

Experimental program
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Effect test

example 1

[0034] The method for preparing Cu micro-nano plate structure comprises the following steps:

[0035] (1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 17.5:17.5:65, when the water and oxygen content is lower than 10ppm 1. Under the protection of high-purity argon gas, the metastable eutectic structure of Cu-Ni-Fe was prepared by using the simultaneous powder feeding laser additive manufacturing system;

[0036] (2) Dealloying: first configure a nitric acid solution with a concentration of 0.05mol / L, then cut the Cu-Ni-Fe metastable eutectic structure obtained in step (1) into small pieces of 5mm×5mm×10mm, and place them in In the nitric acid solution, place it at room temperature for 4 hours to carry out chemical dealloying;

[0037] It is worth noting that in this process, the nitric acid solution should be slightly excessive, and then the final product is controlled by controlling t...

example 2

[0043] This example prepares the method for Cu micro-nano flake structure and comprises the following steps:

[0044](1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 17:17:62, the water oxygen content is lower than 10ppm 1. Under vacuum conditions, the metastable eutectic structure of Cu-Ni-Fe was prepared by using the additive manufacturing system with electron beam high energy as the energy source;

[0045] (2) Dealloying: Place the obtained Cu-Ni-Fe metastable eutectic structure in a 0.03mol / L nitric acid solution. After standing at room temperature for 6 hours, the nitric acid solution turns light yellow, that is, the chemical dealloying is completed. ;

[0046] (3) Cleaning and drying: take out the obtained dealloyed Cu-Ni-Fe metastable eutectic structure, first soak the obtained dealloyed Cu-Ni-Fe metastable eutectic structure with deionized water After cleaning for 3 times, so...

example 3

[0048] This example prepares the method for Cu micro-nano flake structure and comprises the following steps:

[0049] (1) Additive manufacturing of Cu-Ni-Fe metastable eutectic structure: After mixing pure Cu, pure Ni and pure Fe powders at an atomic ratio of 18:18:68, the water oxygen content is lower than 10ppm 1. Under the protection of high-purity argon gas, Cu-Ni-Fe metastable eutectic structure was prepared by using the additive manufacturing system with electron beam high energy as the energy source;

[0050] (2) Dealloying: Place the obtained Cu-Ni-Fe metastable eutectic structure in 0.07mol / L nitric acid solution. After standing at room temperature for 8 hours, the nitric acid solution turns light yellow, that is, the chemical dealloying is completed. ;

[0051] (3) Cleaning and drying: take out the obtained dealloyed Cu-Ni-Fe metastable eutectic structure, first soak the obtained dealloyed Cu-Ni-Fe metastable eutectic structure with deionized water After cleaning f...

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Abstract

The invention discloses a method for preparing Cu micro-nano flake structure by chemical dealloying, comprising the following steps: (1) additively manufacturing Cu-Ni-Fe metastable eutectic structure: pure Cu, pure Ni and pure Fe After the powders are mixed in an atomic ratio of 17-18:17-18:62-68, the Cu-Ni-Fe metastable eutectic structure is prepared by an additive manufacturing system; (2) dealloying: the obtained The Cu-Ni-Fe metastable eutectic structure was placed in a 0.03-0.07mol / L nitric acid solution, and placed at room temperature for 2-8 hours to carry out chemical dealloying; (3) Cleaning and drying: after the obtained dealloying The Cu-Ni-Fe metastable eutectic structure was taken out, soaked and cleaned with deionized water and alcohol in turn, and dried to obtain a Cu micro-nano sheet-like structure. The preparation method obtains a Cu-Ni-Fe metastable structure through an additive manufacturing system, and uses a simple chemical dealloying method to prepare a Cu micro-nano flake structure, which provides a new technical approach for the preparation of complex metal micro-nano structures.

Description

technical field [0001] The invention relates to the field of material science and engineering, in particular to a method for preparing a Cu micro-nano sheet structure by chemical dealloying. Background technique [0002] Due to their size effect and surface effect, metal nanomaterials can exhibit properties that are quite different from those of macroscopic bulk materials, and have the potential to be widely used in many fields such as surface modification, sensing, optics, catalysis, and energy conversion and storage. Therefore, it is an important topic in the field of micro-nano science to explore new methods for preparing metal micro-nano structures in various forms, and the research results have important application value. [0003] At present, a variety of techniques can realize the synthesis and preparation of metal micro-nanostructures, such as vapor phase physical deposition, vapor phase chemical deposition, solution gel method, arc discharge method, sputtering depos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/16C23F1/44B22F3/105B33Y10/00
CPCC23F1/44B22F9/16B33Y10/00B22F10/00B22F1/068B22F10/62B22F10/32B22F10/34B22F10/28B22F10/68Y02P10/25
Inventor 刘学马斌斌乐国敏李晋锋徐庆东
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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