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A kind of ultrafine nanoporous metal and preparation method thereof

A porous metal and ultra-fine nanotechnology, applied in the field of ultra-fine nano-porous metal and its preparation, to achieve the effect of mild reaction, round structure and simple preparation

Active Publication Date: 2017-03-01
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, amorphous alloys are one of the ideal precursor alloys for the preparation of nanoporous metal materials. At present, there are relatively few studies on this aspect, and there are still many problems to be solved urgently.

Method used

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  • A kind of ultrafine nanoporous metal and preparation method thereof
  • A kind of ultrafine nanoporous metal and preparation method thereof
  • A kind of ultrafine nanoporous metal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Example 1: Using Mg 65 Cu 25 Y 10 Preparation of nanoporous copper using amorphous alloy as precursor

[0054] In this embodiment, the selected amorphous alloy precursor composition is Mg 65 Cu 25 Y 10 The preparation method of nanoporous materials is as follows:

[0055] Step 1: Ingredients

[0056] Press Mg 65 Cu 25 Y 10 The nominal composition weighs each elemental element and becomes the raw material for preparing the master alloy ingot.

[0057] Step 2: Melting the pre-alloy

[0058] Press Cu and Y elements as Mg 65 Cu 25 Y 10 The nominal composition is smelted in a vacuum arc smelting furnace for 3-4 times to obtain CuY ingots;

[0059] The melting conditions are: the vacuum degree in the vacuum arc melting furnace during melting is 8×10 -3 Below Pa, fill with 0.5Mpa high-purity argon, smelt for 1-2 minutes each time, and smelt 3-4 times.

[0060] Step 3: Melting the master alloy

[0061] According to Mg 65 Cu 25 Y 10 Nominal composition, take a slight excess of Mg and mix wit...

Embodiment 2

[0072] Example 2: Using Mg 65 Ag 25 Y 10 Preparation of nanoporous silver from bulk amorphous alloy as precursor

[0073] In this embodiment, the selected amorphous alloy precursor composition is Mg 65 Ag 25 Y 10 The preparation method of nanoporous materials is as follows:

[0074] Step 1: Ingredients

[0075] Press Mg 65 Ag 25 Y 10 The nominal composition weighs each elemental element and becomes the raw material for preparing the master alloy ingot.

[0076] Step 2: Melting the pre-alloy

[0077] Press Ag and Y elements as Mg 65 Ag 25 Y 10 The nominal composition is smelted in a vacuum arc smelting furnace, refining 3-4 times to obtain AgY ingots;

[0078] The melting conditions are: the vacuum degree in the vacuum arc melting furnace during melting is 8×10 -3 Below Pa, fill with 0.5Mpa high-purity argon, smelt for 1-2 minutes each time, and smelt 3-4 times.

[0079] Step 3: Melting the master alloy

[0080] According to Mg 65 Ag 25 Y 10 Nominal composition, take a slight excess of Mg a...

Embodiment 3

[0091] Example 3: Using Mg 65 Cu 20 Y 15 Preparation of nanoporous copper using amorphous alloy as precursor

[0092] In this embodiment, the selected amorphous alloy precursor composition is Mg 65 Cu 20 Y 15 The preparation method of nanoporous materials is as follows:

[0093] Step 1: Ingredients

[0094] Press Mg 65 Cu 20 Y 15 The nominal composition weighs each elemental element and becomes the raw material for preparing the master alloy ingot.

[0095] Step 2: Melting the pre-alloy

[0096] Press Cu and Y elements as Mg 65 Cu 20 Y 15 The nominal composition is smelted in a vacuum arc smelting furnace for 3-4 times to obtain CuY ingots;

[0097] The melting conditions are: the vacuum degree in the vacuum arc melting furnace during melting is 8×10 -3 Below Pa, fill with 0.5Mpa high-purity argon, smelt for 1-2 minutes each time, and smelt 3-4 times.

[0098] Step 3: Melting the master alloy

[0099] According to Mg 65 Cu 20 Y 15 Nominal composition, take a slight excess of Mg and mix wit...

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Abstract

The invention relates to ultra-fine nano-porous metal and a preparing method thereof. Specifically, amorphous alloy serves as a precursor, elements except Ag, Pt, Pd, Au, Cu, Ni, Ru, Rh, Os, Ir and other precious metal in the alloy are removed through a dealloying method, a nano-porous structure is formed, simple substance metal or alloy serves as band, the characteristic size of the frenula is smaller than 10 nanometers, and the time roughening feature is not obvious. The prepared ultra-fine nano-porous metal is provided with the ultra-fine holes and the frenula, and the integrity and the self-restraint performance of the structure can be still maintained after 70% of the volume is lost. The preparing method is simple, and adaptability is wide.

Description

Technical field [0001] The invention relates to an ultrafine nano porous metal and a preparation method thereof. Background technique [0002] The preparation of nanoporous metals by the dealloying method utilizes the chemical properties of different components in the alloy to selectively remove one or more of the more active components in the alloy. The inert components form a three-dimensional porous structure to form nanoporous metals. The dealloying method is a method that can easily and quickly obtain a three-dimensional network porous structure with a high specific surface area on the nano-scale. The product bands and pores are continuous with each other, and the porous structure can be dynamically adjusted. The cost is low and it is suitable for large-scale production. . [0003] The precursor alloy is very important for the preparation of nanoporous metals by dealloying. Searching for new types of nanoporous metals and their precursor alloys has always been one of the hot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C45/00C23F1/44
Inventor 张涛徐洪杰
Owner BEIHANG UNIV
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