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Nd and La-doped iron base alloy wave absorption material

A technology of alloys and raw materials, applied in the field of functional materials, can solve the problems of poor performance in low-frequency bands and narrow wave-absorbing frequency bands, and achieve the effect of low cost and simple preparation process

Inactive Publication Date: 2015-08-19
黄鹏腾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fe-based alloys have been extensively studied for their excellent microwave-absorbing performance. Although some achievements have been made, there are still shortcomings such as a narrow microwave-absorbing frequency band and poor low-frequency performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Fe, Nd, and La metals with a purity of more than 99.5% are used as raw materials, according to Fe 17 Nd 1.6 La 0.4 The ingredients are 6g, and the ingredients are smelted with the help of a vacuum electric arc furnace, smelted 3 times to make it evenly smelted, and then the smelted alloy is vacuum-sealed with a quartz glass tube, and the sealed quartz glass tube is put into water to test its tightness. After ensuring that the seal is complete, drain the water, put the glass tube into a box-type resistance furnace for homogenization annealing treatment, and keep the temperature in the furnace at 600°C. After annealing for 15 days, take out the sample and quickly put it into the ice-water mixture for quenching. After fully cooling, take it out, break the glass tube to take out the sample, polish off the surface layer of the sample, and use a mortar jar to mechanically pulverize the sample. When the particle size is about 0.5mm, collect the powder and pour it into a ball ...

Embodiment 2

[0026] Fe, Nd, and La metals with a purity of more than 99.5% are used as raw materials, according to Fe 17 Nd 1.5 La 0.5 The ingredients are 6g, and the ingredients are smelted with the help of a vacuum electric arc furnace, smelted 3 times to make it evenly smelted, and then the smelted alloy is vacuum-sealed with a quartz glass tube, and the sealed quartz glass tube is put into water to test its tightness. After ensuring that the sealing is complete, drain the water, put the glass tube into a box-type resistance furnace for homogenization annealing treatment, the temperature in the furnace is 650 ° C, after annealing for 14 days, take out the sample and quickly put it into the ice-water mixture for quenching, fully Take it out after cooling, break the glass tube to take out the sample, polish off the surface layer of the sample, and use a mortar jar to mechanically crush the sample. When the particle size is about 0.5mm, collect the powder and pour it into a ball mill jar,...

Embodiment 3

[0028] Fe, Nd, and La metals with a purity of more than 99.5% are used as raw materials, according to Fe 17 Nd 1.4 La 0.6 The ingredients are 6g, and the ingredients are smelted with the help of a vacuum electric arc furnace, smelted 3 times to make it evenly smelted, and then the smelted alloy is vacuum-sealed with a quartz glass tube, and the sealed quartz glass tube is put into water to test its tightness. After ensuring that the seal is complete, drain the water, put the glass tube into a box-type resistance furnace for homogenization annealing, and keep the temperature in the furnace at 700°C. After 12 days of annealing, take out the sample and quickly put it into the ice-water mixture for quenching. After fully cooling, take it out, break the glass tube to take out the sample, polish off the surface layer of the sample, and use a mortar jar to mechanically pulverize the sample. When the particle size is about 0.5mm, collect the powder and pour it into a ball mill jar. ...

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PUM

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Abstract

According to the invention, Nd and La are added into a Fe base alloy to prepare microwave absorption micropowder with excellent performance, and the micropowder is characterized in that metal Fe, Nd and La are used as raw materials, burdening is performed according to an atom ratio of Fe17Nd2-xMnx (x is larger than or equal to 0.2 and is smaller than or equal to 0.7), operations of smelting, vacuum sealing, homogenization treatment, quenching and the like are performed to prepare the wave absorption alloy, then the alloy is mechanically preliminarily crushed, and is ball-ground with a planet type ball grinder under a gasoline environment protection condition, after ball grinding, the powder is collected and aired to obtain the wave absorption micropowder.

Description

technical field [0001] The invention relates to a preparation method of alloy microwave-absorbing micropowder, in particular to a preparation method of iron-based alloy microwave-absorbing micropowder doped with Nd and La, and belongs to the field of functional materials. Background technique [0002] With the widespread use of mobile communications and electronic devices, while it brings convenience, it also emits radiation hazards that affect people's health. In the military, with the continuous development of stealth and anti-stealth technology, stealth materials are constantly being developed. As a functional material capable of absorbing electromagnetic waves, microwave absorbing materials can convert electromagnetic wave energy into other forms of energy, thereby suppressing electromagnetic wave radiation and interference. Now absorbing materials are widely used in many aspects such as stealth aircraft, stealth missiles, human body safety protection, microwave anechoi...

Claims

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Application Information

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IPC IPC(8): C22C38/00C21D6/00B22F1/00B22F9/04
Inventor 黄鹏腾
Owner 黄鹏腾
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