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Preparation method of Fe-Nd-Al alloy microwave absorbing material

A technology of microwave absorbing materials and alloys, which is applied in the field of preparation of alloy absorbing materials, can solve the problems of heavy weight and narrow absorbing frequency band, and achieve the effects of light weight, wide absorbing frequency band and low cost

Inactive Publication Date: 2015-08-12
黄鹏腾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FeNd alloys have been extensively studied for their excellent microwave-absorbing properties. Although some results have been achieved, there are still shortcomings such as narrow microwave-absorbing frequency bands and heavy weight.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The metal Fe, Nd, and Al with a purity greater than 99.5% are atomically divided into Fe 17 Nd 1.6 Al 0.4 ingredients. Put the prepared raw materials into the vacuum electric arc furnace for smelting, put the smelted samples into the quartz glass tube, and perform vacuum sealing operation, then put the sealed quartz glass tube into the water to test its tightness, and check that the seal is intact Finally, put the glass tube into a box-type resistance furnace for annealing at 500°C. After 15 days, take out the glass tube and put it in the ice-water mixture and quench it. After cooling down sufficiently, take out the glass tube and smash it. Take out the sample, grind off the surface layer of the sample, and then use a mortar for mechanical preliminary crushing. After the mechanical crushing, use a planetary ball mill for ball milling. Under the protection of gasoline, the mass ratio of balls to materials is 15:1, and the speed is 250 r / min, ball milling for 50 h, af...

Embodiment 2

[0026] The metal Fe, Nd, and Al with a purity greater than 99.5% are atomically divided into Fe 17 Nd 1.5 Al 0.5 ingredients. Put the prepared raw materials into the vacuum electric arc furnace for smelting, put the smelted samples into the quartz glass tube, and perform vacuum sealing operation, then put the sealed quartz glass tube into the water to test its tightness, and check that the seal is intact Finally, put the glass tube into a box-type resistance furnace for annealing at 600°C. After 14 days, take out the glass tube and put it in the ice-water mixture and quench it. After it is fully cooled, take out the glass tube and smash it. Take out the sample, polish off the surface layer of the sample, and then use a mortar for mechanical preliminary crushing. After mechanical crushing, use a planetary ball mill for ball milling. Under the protection of gasoline, the mass ratio of balls to materials is 15:1, and the speed is 300 r / min, ball milling for 60 h, after the ba...

Embodiment 3

[0028] The metal Fe, Nd, and Al with a purity greater than 99.5% are atomically divided into Fe 17 Nd 1.4 Al 0.6 ingredients. Put the prepared raw materials into the vacuum electric arc furnace for smelting, put the smelted samples into the quartz glass tube, and perform vacuum sealing operation, then put the sealed quartz glass tube into the water to test its tightness, and check that the seal is intact Finally, put the glass tube into a box-type resistance furnace for annealing at 700°C. After 12 days, take out the glass tube and place it in the ice-water mixture and quench it. After cooling down sufficiently, take out the glass tube and smash it into pieces. Take out the sample, grind off the surface layer of the sample, and then use a mortar for mechanical preliminary crushing. After the mechanical crushing, use a planetary ball mill for ball milling. Under the protection of gasoline, the mass ratio of balls to materials is 15:1, and the speed is 350 r / min, ball millin...

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Abstract

The invention provides a preparation method of a Fe-Nd-Al alloy microwave absorbing material. The preparation method comprises the following steps: preparing high-purity metals: Fe, Nd, and Al according to a certain atom ratio, adding the prepared Fe, Nd, and Al into an arc melting furnace to smelt the alloy, transferring the alloy to a quartz glass tube, vacuumizing and sealing the quartz glass tube, homogenizing and quenching the alloy, primarily and mechanically grinding the alloy in a grinding mortar, finally carrying out high-energy ball milling under the protection of gasoline, taking out the sample powder, and drying in the air so as to obtain the microwave absorbing material having the advantages of wide absorption frequency band, high absorption rate, and light weight.

Description

technical field [0001] The invention relates to a method for preparing an alloy wave-absorbing material, in particular to a method for preparing an aluminum-doped iron-based alloy wave-absorbing material. Background technique [0002] With the development of electronics and informatization, the electromagnetic waves generated by a large number of electronic products interfere with each other, which will lead to serious problems such as communication interruption and equipment failure. In the military, with the continuous development of stealth technology and stealth equipment, stealth materials will definitely promote the accelerated development of stealth and anti-stealth countermeasure technology. Materials that absorb electromagnetic waves have become a major issue in materials science. As a functional material capable of absorbing electromagnetic waves, microwave absorbing materials can convert electromagnetic wave energy into other forms of energy, thereby suppressing e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C21D6/00B22F1/00B22F9/04
Inventor 黄鹏腾
Owner 黄鹏腾
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