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Pressureless sintering preparation method of three-dimensional porous structure

A three-dimensional porous, pressure vessel technology is applied in the field of preparation of three-dimensional porous structures, which can solve the problems of difficult cleaning of surface products, uneven distribution of pores, and high equipment costs, so as to ensure uniform distribution in a large area, avoid difficult cleaning, and simplify the production process. Effect

Active Publication Date: 2021-09-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems of uneven pore distribution, difficult cleaning of surface products, high equipment cost and complicated process in the existing preparation method of three-dimensional porous structure, and further provides a pressureless sintering preparation method of three-dimensional porous structure

Method used

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  • Pressureless sintering preparation method of three-dimensional porous structure
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  • Pressureless sintering preparation method of three-dimensional porous structure

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specific Embodiment approach 1

[0025] Embodiment 1: In this embodiment, a method for preparing a three-dimensional porous structure without pressure sintering is carried out according to the following steps:

[0026] 1. Pretreatment of precursor powder:

[0027] Under the condition that the rotation speed is 100rpm-600rpm, ball mill the precursor powder, and filter after ball milling to obtain the pretreated powder;

[0028] The particle size of the pretreated powder is 100 mesh to 1000 mesh;

[0029] 2. Precursor curing:

[0030] Spread the pretreated powder evenly in a pressure vessel, and press it for 5s to 1000s under the condition of a pressure of 0.1MPa to 100MPa. After the pressing is completed, a block precursor is obtained;

[0031] 3. Pressureless sintering:

[0032] Put the bulk precursor in the heating furnace, and adjust the protective gas in the heating furnace to 10torr~1000torr, and then raise the temperature to 600℃~1500℃ at a rate of 5℃ / min~20℃ / min, and at a temperature of 600 Under th...

specific Embodiment approach 2

[0040] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the precursor powder described in step 1 is pure iron powder, pure tin powder, pure aluminum powder, pure zinc powder, silver-based solder, tin-based One or a mixture of brazing filler metals, aluminum-based brazing filler metals, silicon-based brazing filler metals and halogen salts. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0041] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the bottom surface area of ​​the bulk precursor described in step 2 is 10mm 2 ~10m 2 , with a height of 1 mm to 100 mm. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a pressureless sintering preparation method of a three-dimensional porous structure, and relates to a preparation method of a three-dimensional porous structure. The invention aims to solve the problems of non-uniform pore distribution, difficulty in cleaning surface products, high equipment cost and complex process in the existing preparation method of the three-dimensional porous structure. The preparation method comprises the following steps: 1, pretreating precursor powder; 2, curing the precursor; 3, carrying out pressureless sintering; and 4, post-processing. The method is used for pressureless sintering preparation of the three-dimensional porous structure.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional porous structure. Background technique [0002] Compared with ordinary solid metals, the three-dimensional porous structure has quite a lot of characteristics and excellent properties. This kind of low-density material often has good energy absorption performance, and because of its large number of pores, it makes it effective in heat insulation, heat resistance, penetration and conduction, and cooling. , sound insulation and other fields have a wide range of applications and research value. [0003] Melt foaming method, direct gas injection method and powder metallurgy method are the main means and ways to prepare porous metal materials at present. The above methods usually involve hot pressing and sintering, which have certain requirements for equipment, and methods such as melt foaming method and direct gas injection method have the problem of uneven distribution of pores. Theref...

Claims

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Application Information

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IPC IPC(8): B22F3/11B22F3/24B22F5/10B22F9/04
CPCB22F3/1017B22F3/11B22F3/24B22F9/04B22F3/1007B22F5/10B22F2003/247B22F2009/043
Inventor 亓钧雷闫耀天刘柏深曹健冯吉才
Owner HARBIN INST OF TECH
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