Preparation method of nano porous copper

A nanoporous copper technology, applied in the field of alloy manufacturing, can solve the problems of unsuitability for large-scale industrial production, complex preparation process operation, and long production cycle, and achieve low cost of preparation equipment, simple preparation process operation, and short cycle Effect

Active Publication Date: 2013-02-27
HEBEI UNIV OF TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of nanoporous copper, which is a method for preparing nanoporous copper by free dealloying technology, using ternary amorphous alloy material as the original material, at room temperature, with low concentration Hydrofluoric acid solution undergoes free dealloying treatment to quickly prepare nanoporous copper, which overcomes the disadvantages of complex operation, high cost, long production cycle and unsuitability for large-scale industrial production in the prior art.

Method used

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Experimental program
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Effect test

Embodiment 1

[0025] The first step is to prepare Cu-Hf-Al master alloy ingot

[0026] According to the atomic percentage of each element in the target alloy: Cu is 50.00%, Hf is 45.00% and Al is 5.00%, calculate the quality of required raw material, take by weighing the copper sheet 158.87g that mass percentage purity is 99.99%, mass percentage purity is 401.61g of 99.99% hafnium particles and 6.75g of aluminum block with a mass percentage purity of 99.99%, and mix the weighed copper sheet, hafnium particles and aluminum block to obtain the master alloy raw material; then place the master alloy raw material in a vacuum electric arc furnace In the process, 7g of pure zirconium was independently placed in a vacuum electric arc furnace without contact with the master alloy, and was used as a deoxidizing material to melt under the protection of argon. The melting current was gradually increased from 30A to 110A, and the melting was repeated 4 times, each time 38 Seconds, to ensure the homogene...

Embodiment 2

[0034] The first step is to prepare Cu-Hf-Al master alloy ingot

[0035] According to the atomic percentage of each element in the target alloy: Cu is 52.50%, Hf is 40.00% and Al is 7.5%, calculate the quality of required raw material, take by weighing the copper flake 166.81g that mass percentage purity is 99.99%, mass percentage purity is 356.98g of 99.99% hafnium particles and 10.13g of aluminum block with a mass percentage purity of 99.99%, and mix the weighed copper sheet, hafnium particles and aluminum block to obtain the master alloy raw material; then place the master alloy raw material in a vacuum electric arc furnace In the process, 7g of pure zirconium was independently placed in a vacuum electric arc furnace without contact with the master alloy, and was used as a deoxidizing material to melt under the protection of argon. The melting current was gradually increased from 30A to 110A, and the melting was repeated 4 times, each time 40 Seconds, to ensure the uniformi...

Embodiment 3

[0043] The first step is to prepare Cu-Hf-Al master alloy ingot

[0044] According to the atomic percentage of each element in the target alloy: Cu is 55.00%, Hf is 42.50% and Al is 2.5%, calculate the quality of required raw material, take by weighing the copper flake 174.75g that mass percentage purity is 99.99%, mass percentage purity is 379.29g of 99.99% hafnium particles and 3.38g of aluminum block with a mass percentage purity of 99.99%, and mix the weighed copper sheet, hafnium particles and aluminum block to obtain the master alloy raw material; then place the master alloy raw material in a vacuum electric arc furnace In the process, 7g of pure zirconium was independently placed in a vacuum electric arc furnace without contact with the master alloy, and was used as a deoxidizing material to melt under the protection of argon. The melting current was gradually increased from 30A to 110A. Seconds, to ensure the uniformity of the alloy structure, cooling with the furnace ...

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Abstract

The invention discloses a preparation method of nano porous copper, and relates to manufacture of alloy with pores, in particular to a method for preparing the nano porous copper by adopting a free dealloying technology. The preparation method comprises the following steps of: firstly according to the atomic percent of all elements in target alloy: 50.00-55.00% of Cu, 40.00-45.00% of Hf and the balance of Al, weighing copper pieces with the mass percent purity being 99.99%, hafnium particles with the mass percent purity being 99.99% and aluminium blocks with the mass percent purity being 99.99%; putting raw materials of master alloy in a vacuum electric-arc furnace, smelting to prepare Cu-Hf-Al master-alloy casting ingot; then preparing a Cu-Hf-Al amorphous alloy strip by using the master-alloy casting ingot; and finally carrying out dealloying treatment with low-concentration hydrofluoric acid solution to prepare the nano porous copper belt. The preparation method disclosed by the invention has the advantages that the defects of complex operation, high cost, long production period and inapplicability for large-scale industrial production in the prior art are overcome.

Description

technical field [0001] The technical solution of the invention relates to the manufacture of alloys with pores, in particular to the preparation method of nanoporous copper. Background technique [0002] Nanoporous metal is a porous metal material with a pore size on the order of nanometers. Compared with traditional porous metals, its pore size is smaller and its specific surface area is higher, so it has special physical, chemical and mechanical properties, such as unique electromagnetic properties, more High chemical activity, higher strength, etc. Therefore, nanoporous metals have opened up the application fields of porous metals, and as potential sensors, heat exchangers, catalytic materials, surface-enhanced Raman scattering and low-density high-yield strength materials, they have been highly valued by the international material science community. [0003] In recent years, the use of dealloying to prepare nanoporous metals has become a major research boom in the world...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08
Inventor 秦春玲赵维民王志峰刘慧贾俊清
Owner HEBEI UNIV OF TECH
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