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Preparation method for clean foam magnesium in bionic field

A technology for cleaning foam and magnesium foam, which is applied in the field of preparation of through-hole foam magnesium, can solve the problems of difficult preparation of large parts and high cost, and achieve the effect of solving heterogeneous residues, low cost and broad application prospects

Inactive Publication Date: 2013-11-20
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] The sputtering deposition method is characterized by ideal pore structure characteristics, but it is expensive and difficult to prepare large parts

Method used

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  • Preparation method for clean foam magnesium in bionic field
  • Preparation method for clean foam magnesium in bionic field
  • Preparation method for clean foam magnesium in bionic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: The preparation method of the cleaning foam magnesium that is used in bionic field is characterized in that comprising the following steps:

[0047] (1) Firstly, the primary NaCl particles are dried and ball-milled into powder, passed through a 200-mesh sieve, and the NaCl powder is granulated to prepare secondary particles with a particle size of 0.1-5 mm, and the obtained particles are sequentially passed through 8 mesh, 12-mesh, 16-mesh, 30-mesh, 60-mesh and 100-mesh sieves to screen secondary particles of different sizes;

[0048] (2) Put the granular raw material obtained in step (1) into a muffle furnace for pre-sintering, keep it at 600-700°C for 10-120min, take it out and cool it naturally;

[0049] (3) Seepage: Melt magnesium metal at 660-700°C, spread SY-LF1 covering agent on the molten metal, and then pre-sinter the particles in step (2) (which can be particles of the same mesh level or a variety of different meshes Number of particles mixed) pr...

Embodiment 2

[0051] Example 2: Put secondary NaCl spherical particles with an average diameter of 1 mm into a metal mold with a diameter of 105 mm and a height of 90 mm, vibrate, compact, and preheat in a resistance furnace; raise the temperature to 650 ° C and keep it for 1 hour; then in 0.5 Under atm, molten metal magnesium at 680°C is percolated and casted into preheated blocks at 650°C under the protection of argon; after cooling, the spherical salt particles are removed by washing with water to obtain spherical clean foam magnesium with a porosity of 60%.

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Abstract

The invention discloses a preparation method for clean foam magnesium in the bionic field, which comprises first drying primary NaC1 particles, and performing ball-milling to obtain a power body, then preparing secondary particles by performing a granulation step on the NaC1 power body, and screening the particles to be different particle sizes through a screen; performing presintering on the NaC1 particles, lastly melting metal magnesium, paving a SY-LF1 covering agent above metal liquid, performing pressurizing seepage through inert gas to enable the metal magnesium liquid to seep into gaps of prefabricated block particles, removing NaC1 after cooling, and obtaining the foam magnesium. Compared with a powder metallurgic method and a traditional particle seepage flow method, the preparation method has the advantages that the seepage flow particles are the secondary particles which have optimized dissolubility compared with the primary particles, and the secondary particles are extremely easy to remove after seepage flow, can not cause corrosion and damage to a magnesium foam substrate, and the method has great application prospects in the bionic field.

Description

technical field [0001] The invention relates to a preparation process of foamed magnesium, in particular to a preparation method of clean, high-purity through-hole foamed magnesium without heterogeneous residues used in the field of bionic research. Background technique [0002] Metal foam is a material with many holes distributed in the metal matrix. Compared with the corresponding solid metal, it has the characteristics of low density, large specific surface area, and good energy absorption rate. It is a new type of material integrating structure and function. . As a structural material, it has the characteristics of light weight and high strength; as a functional material, it also has the characteristics of sound absorption, heat insulation, shock resistance, impact resistance, high damping, electromagnetic shielding, etc., and has broad application prospects in many fields. For example, it can be used in landing gear, shock absorbers, buffers, filters, mufflers, porous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C23/00
Inventor 曹箭波王幸福厉运杰任月路王新福韩福生
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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