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Method for preparing foam metal with controllable pore structure

A technology of foam metal and pore structure, applied in manufacturing, additive processing, etc., can solve the problems of incomplete dissolution of pore-forming agent, corrosion of matrix, etc., and achieve the effects of easy removal of residues, easy demoulding, and cheap raw materials

Active Publication Date: 2021-01-26
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art and solve the technical problems that the pore-forming agent is not completely dissolved during the forming process of the foamed metal sample, and the matrix is ​​easily corroded when the pore-forming agent dissolves, the invention provides a preparation method with controllable pore structure. metal foam method

Method used

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  • Method for preparing foam metal with controllable pore structure
  • Method for preparing foam metal with controllable pore structure
  • Method for preparing foam metal with controllable pore structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Such as figure 1 Shown is a method for preparing metal foam with controllable pore structure, using sodium thiosulfate as a pore-forming agent to prepare metal foam with controllable pore structure, comprising the following steps:

[0050] S1, metal foam pore structure design, determine the shape and structure of the hole: in this embodiment one, the shape of the metal foam hole is designed as a short rod, according to the porosity 65% ​​and the shape of the hole of the metal foam to be formed, select Sodium thiosulfate is used as the raw material of pore-forming agent, and it is determined that pore-forming agent weight is 35.6g, and the material of metal powder is aluminum, and the weight of metal powder is 40.8g;

[0051] S2, according to the weight of the pore-forming agent determined in step S1, take the sodium thiosulfate particles, by figure 2 It can be seen that the initial state of the sodium thiosulfate raw material is a short rod, so directly take the short...

Embodiment 2

[0058] Such as figure 1 Shown is a method for preparing metal foam with controllable pore structure, using sodium thiosulfate as a pore-forming agent to prepare metal foam with controllable pore structure, comprising the following steps:

[0059] S1, metal foam pore structure design, determine the shape and structure of the hole: in this embodiment two, the shape of the metal foam hole is designed to be granular, according to the porosity 65% ​​and the shape of the hole of the metal foam to be formed, select Sodium thiosulfate is used as the raw material of pore-forming agent, and it is determined that pore-forming agent weight is 35.6g, and the material of metal powder is aluminum, and the weight of metal powder is 40.8g;

[0060] S2, weigh the sodium thiosulfate particles according to the weight of the pore-forming agent determined in step S1, put the short rod-shaped sodium thiosulfate particles into a pulverizer and grind them into powder to obtain a particulate pore-formi...

Embodiment 3

[0067] Such as figure 1 Shown is a method for preparing metal foam with controllable pore structure, using sodium thiosulfate as a pore-forming agent to prepare metal foam with controllable pore structure, comprising the following steps:

[0068] S1, metal foam pore structure design, determine the shape and structure of the hole: in this embodiment three, the shape of the metal foam hole is designed to be spherical, according to the porosity 70% and pore shape of the metal foam to be formed, select sulfur Sodium sulfate is used as the raw material of pore-forming agent, and it is determined that pore-forming agent weight is 44.0g, and the material of metal powder is aluminum, and the weight of metal powder is 30.5g;

[0069] S2. Preparation of pore-forming agent with controllable shape:

[0070] First, if Figure 16 As shown, making the overturning mold: According to the shape of the pore-forming agent designed in step S1, ABS is selected as the raw material for 3D printing,...

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Abstract

The invention relates to a method for preparing foam metal with a controllable pore structure, belongs to the technical field of foam metal material preparation, and solves the technical problems thata pore-forming agent is not completely dissolved out in the forming process of a foam metal sample by a sintering dissolution method, and a matrix is easy to corrode when the pore-forming agent is dissolved. According to the solution scheme, sodium thiosulfate is adopted as the pore-forming agent to prepare foam metal with the controllable pore structure, and by designing pore shape, determiningthe weight of required sodium thiosulfate particles and metal powder, preparing the pore-forming agent, powder mixing, cold pressing, pore-forming agent dissolving, drying and sintering, so that the foam metal with the controllable pore structure is prepared; and sodium thiosulfate is used as the pore-forming agent, a 3D printing technology is used for processing a plastic mold, sodium thiosulfatecan be reshaped as required to obtain sodium thiosulfate particles of any shape and structure, the prepared sodium thiosulfate particles are used as the pore-forming agent, and foam metal of variousuniform and regular pore structures can be obtained by adopting a space-occupying sintering method.

Description

technical field [0001] The invention belongs to the technical field of foam metal material preparation, and in particular relates to a method for preparing foam metal with controllable pore structure. Background technique [0002] Metal foam is a new type of functional-structural integration material that has been widely studied in recent years. Its remarkable feature is that there are a large number of millimeter-scale macroscopic holes in the metal or metal alloy matrix. According to the connectivity of pores, metal foam can be divided into two categories: closed cells and open cells. The former has pores independently distributed in the matrix, while the latter has a three-dimensional connected structure. For metal foam, pores are the functional structure that researchers expect to appear, and are the means to achieve the optimization index of metal foam, while the control of the pore structure mainly depends on the preparation method and process technology. The coupling...

Claims

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Application Information

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IPC IPC(8): B22F3/11B29C64/10B33Y10/00
CPCB22F3/1134B22F3/114B29C64/10B33Y10/00
Inventor 王录才孙磊磊王艳丽王芳游晓红黄闻战
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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