Preparation method of nanoporous nickel block

A nanoporous nickel, block technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex process, long production cycle, high cost, and achieve simple preparation process and equipment. The effect of low cost and short cycle

Active Publication Date: 2016-01-06
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing nanoporous nickel blocks, and select nickel-based alloys with large amorphous formation energy and large potential difference between elements in the hydrofluoric acid corrosion solution to prepare large-sized nickel Based on an amorphous block, and adopting a dealloying process to produce a large-area uniform nanoporous nickel block, which overcomes the defects of small macroscopic size, difficult shape control, and uneven pore structure of the porous nickel prepared by the prior art. At the same time, it also overcomes the shortcomings of the prior art method for preparing porous nickel that is relatively complicated, has a long production cycle, high cost and is not suitable for large-scale production.

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  • Preparation method of nanoporous nickel block
  • Preparation method of nanoporous nickel block
  • Preparation method of nanoporous nickel block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The first step, the selection of nickel-based amorphous alloy raw materials:

[0032] Select an amorphous alloy with large amorphous formation energy to form a nickel-based amorphous alloy Ni with a maximum thickness of 2mm 45 Ti 20 Zr 25 Al 10 The raw material is the material for preparing the precursor alloy, where the right subscript value of the element symbol is the atomic percentage of the element composition;

[0033] The second step, the preparation of the precursor alloy:

[0034] Put the nickel-based amorphous alloy raw material selected in the first step into a vacuum of 9.0×10 -4 In a vacuum electric arc furnace of Pa, it is heated to a molten state, and an inert gas is introduced to generate a pressure difference of 0.02MPa between the cavity of the vacuum electric arc furnace and the mold, and the molten liquid alloy is sucked into the mold to obtain a thickness of 1mm and a width of 1cm and Ni with a length of 7cm45 Ti 20 Zr 25 Al 10 Nickel-based ...

Embodiment 2

[0042] The first step, the selection of nickel-based amorphous alloy raw materials:

[0043] Select an amorphous alloy with large amorphous formation energy to form a nickel-based amorphous alloy Ni with a maximum thickness of 2mm 60 Nb 20 Ti 15 Zr 5 The raw material is the material for preparing the precursor alloy, where the right subscript value of the element symbol is the atomic percentage of the element composition;

[0044] The second step, the preparation of the precursor alloy:

[0045] Put the nickel-based amorphous alloy raw material selected in the first step into a vacuum of 9.0×10 -4 In a vacuum electric arc furnace of Pa, it is heated to a molten state, and an inert gas is introduced to generate a pressure difference of 0.02MPa between the cavity of the vacuum electric arc furnace and the mold, and the molten liquid alloy is sucked into the mold to obtain a thickness of 1mm and a width of 1cm and Ni with a length of 7cm 60 Nb 20 Ti 15 Zr 5 Nickel-based ...

Embodiment 3

[0051] The first step, the selection of nickel-based amorphous alloy raw materials:

[0052] Choose an amorphous with large amorphous formation energy to form Ni with a maximum thickness of 1.5mm 60 Nb 25 Ti 15 The raw material is the material for preparing the precursor alloy, where the right subscript value of the element symbol is the atomic percentage of the element composition;

[0053] The second step, the preparation of the precursor alloy:

[0054] Put the nickel-based amorphous alloy raw material selected in the first step into a vacuum of 9.0×10 -4 In a vacuum electric arc furnace of Pa, it is heated to a molten state, and an inert gas is introduced to generate a pressure difference of 0.02MPa between the cavity of the vacuum electric arc furnace and the mold, and the molten liquid alloy is sucked into the mold to obtain a thickness of 1mm and a width of 1cm and Ni with a length of 7cm 60 Nb 25 Ti 15 Nickel-based amorphous master alloy sheet;

[0055] The thi...

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Abstract

The invention relates to a preparation method of a nanometer porous nickel block, and relates to a nickel-base alloy. The preparation method comprises the following steps: firstly preparing a precursor alloy, namely a nickel-base amorphous-state mother alloy sheet with the thickness of 1 mm, the width of 1 cm and the length of 7 cm, by selecting nickel-base amorphous alloy Ni45Ti20Zr25Al10, Ni60Nb20Ti15Zr5 or Ni60Nb25Ti15 raw materials with high amorphous formation energy and high potential difference among elements contained in a hydrofluoric acid corrosive liquid; and then preparing the large-area uniform nanometer porous nickel block by adopting a dealloying method process. The preparation method disclosed by the invention overcomes the defects of small macroscopic size, difficult shape control and nonuniform pore structure of porous nickel prepared in the prior art and also overcomes the defects of complex process, long production period, high cost and unsuitable large-scale production of the method for preparing the porous nickel in the prior art.

Description

technical field [0001] The technical scheme of the invention relates to a nickel-based alloy, specifically a method for preparing a nanoporous nickel block. Background technique [0002] The nanoporous nickel structure is mainly composed of metallic nickel skeleton and pores. Compared with dense bulk nickel, nanoporous nickel has a large number of nanopores inside. This material has many excellent characteristics, such as low density, large specific surface area, excellent optical properties and electrochemical properties, so it can be used to make filters. , catalyst and catalyst carrier, porous electrode, etc. The research on nanoporous nickel has become one of the hot spots in the research field of new porous materials. [0003] The dealloying method is one of the effective ways to prepare nanoporous metal materials. This method is an etching technique that selectively removes the more active metals in the alloy, thereby obtaining a nanoporous structure of relatively i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/04B82Y40/00B82Y30/00
Inventor 秦春玲王志峰赵维民王丽娟刘江云
Owner HEBEI UNIV OF TECH
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