Porosity aperture controllable magnesium foam material and preparation method thereof

A foam material and porosity technology, which is applied in the field of magnesium foam materials with controllable porosity and pore size and their preparation, can solve the problems of inability to produce magnesium foam materials, and achieve the purpose of preventing delamination, reducing scrap rate, and high energy absorption. performance effect

Inactive Publication Date: 2009-01-21
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

However, no matter it is a special ceramic foam filter for magnesium alloy or its preparation method, there are deficiencies. First, the ceramic foam filter is ceramic foam rather than magnesium foam; secondly, the preparation method cannot produce magnesium foam

Method used

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  • Porosity aperture controllable magnesium foam material and preparation method thereof
  • Porosity aperture controllable magnesium foam material and preparation method thereof
  • Porosity aperture controllable magnesium foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: 1) After mixing magnesium powder, spherical urea particles with a size in the order of millimeters, and additive ethanol uniformly, they are placed in a mold with a desired shape and subjected to a unidirectional pressure of 300 MPa to obtain a green body; wherein, The mass of magnesium powder and urea granules is determined by the formula m 镁 =V×(1-P)×1.74, m 尿素 =V×P×1.335, where V is the volume of the magnesium foam, P is the porosity (50%), 1.74 and 1.335 are the density of magnesium powder and urea in the dense state, and the amount of additive ethanol added It is 1% of the total mass of magnesium powder and urea. 2) Soak the green body in an aqueous sodium hydroxide solution with a concentration of 0.0005 mol / L for 5 hours. 3). Put the soaked green body in an argon atmosphere at 240°C for 5 hours, and then place it at 610°C for 4.5 hours, or first place the soaked green body under vacuum (the degree of vacuum is ≤10 -4 Pa) in 240 ℃ for 5 hours, and then plac...

Embodiment 2

[0014] Example 2: 1) After mixing magnesium powder, spherical urea particles with a size in the order of millimeters, and additive ethanol uniformly, they are placed in a mold with a desired shape and subjected to unidirectional pressure at 325 MPa to obtain a green body; wherein, The mass of magnesium powder and urea granules is determined by the formula m 镁 =V×(1-P)×1.74, m 尿素 =V×P×1.335, where V is the volume of the magnesium foam, P is the porosity (currently selected as 60%), 1.74 and 1.335 are the density of magnesium powder and urea in the dense state, and the amount of additive ethanol added It is 2% of the total mass of magnesium powder and urea. 2) Soak the green body in an aqueous sodium hydroxide solution with a concentration of 0.00075 mol / L for 3 hours. 3). Put the soaked green body in an argon atmosphere at 245°C for 4.5 hours, and then place it at 615°C for 4 hours, or first place the soaked green body under vacuum (the degree of vacuum is ≤10 -4 Pa) in 245 ℃ for 4...

Embodiment 3

[0015] Example 3: 1) After mixing magnesium powder, spherical urea particles with a size in the order of millimeters, and additive ethanol uniformly, they are placed in a mold of a desired shape and subjected to unidirectional pressure 350MPa to obtain a green body; wherein, The mass of magnesium powder and urea granules is determined by the formula m 镁 =V×(1-P)×1.74, m 尿素 =V×P×1.335, where V is the volume of magnesium foam, P is the porosity (70%), 1.74 and 1.335 are the density of magnesium powder and urea in the dense state, and the amount of additive ethanol added It is 3% of the total mass of magnesium powder and urea. 2) The green body is immersed in a sodium hydroxide aqueous solution with a concentration of 0.001 mol / L for 1.5 hours. 3). Put the soaked green body in an argon atmosphere at 250°C for 4 hours, and then place it at 620°C for 3.5 hours, or first place the soaked green body under vacuum (the degree of vacuum is ≤10 -4 Pa) in 250 ℃ for 4 hours, and then placed at...

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Abstract

The invention discloses a magnesium foam material with controllable porosity and pore diameter and a method for preparation. The material is an opening magnesium foam made of inter-communicating spatial network with porosity of 50-80% and pore diameter of 0.2-5mm; the method includes the steps of: 1) green ware body is produced by pressurizating the mixture of magnesium powder and urea granule of millimeter dimension and additive after the mixture is uniform; 2) green ware body is placed in the alkaline aqueous solution of 0.0005-0.0015 mol / l and soaked for 0.5-5 hours; 3)the soaked green ware body is in the argon atmosphere at the temperature of 240-260 DEG C for at least 3 hours, then at the temperature of 610-630 DEG C for at least 2.5 hours, or is in vacuum atmosphere at the temperature of 240-260 DEG C for at least 3 hours, then at the temperature of 580-610 DEG C for at least 2.5 hours, to produce the magnesium foam material with controllable porosity and pore diameter. The material can be widely usablr for the fields such as power-absorbing, shakeproof, electromagnetic shielding, and biomaterial or the like with long plastic table stressed zone and special highly damped capacity.

Description

Technical field [0001] The invention relates to a magnesium foam material and a preparation method, in particular to a magnesium foam material with controllable porosity and pore size and a preparation method thereof. Background technique [0002] The crystal structure of metallic magnesium and the particularity of the electronic arrangement outside the core make it have high damping ability and electromagnetic resistance. For magnesium foam, it not only has a special structure, but also has the functions of ultra-light weight, noise reduction, vibration retention, electromagnetic shielding and anti-aging. According to this, the magnesium foam material can be used to make mufflers, shock absorbers, and replacements. Heaters, solar absorbers, catalyst carriers, electromagnetic shields, and metal structural material components with light weight and appropriate strength, etc., provide the possibility to solve many major technical problems. For example, using the good sound absorptio...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C1/04
Inventor 郝刚领韩福生王清周吴杰
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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