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Preparation method of chromium-doped ferrous alloy wave-absorbing material

A technology of microwave-absorbing materials and iron-based alloys, which is applied in the field of preparation of iron-based alloy microwave-absorbing materials, can solve the problems of narrow microwave-absorbing frequency band and unsatisfactory microwave-absorbing performance, and achieve wide frequency-absorbing frequency, high absorption strength, and easy preparation The effect of simple process

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 performance. Although some achievements have been made, the microwave-absorbing performance is still not ideal, and the microwave-absorbing frequency band is narrow.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The metal Fe, Nd, Cr with a purity greater than 99.5% is Fe in atomic ratio 17 Nd 1.7 Cr 0.3 ingredients. Put the prepared samples into the vacuum electric arc furnace, and repeat the operation of vacuuming, ventilation and washing for three times, and then fill a certain amount of argon as a protective gas, and start melting. Each sample is melted three times, and the melted samples are Put it into a quartz glass tube and carry out vacuum sealing operation. Put the glass tube into water to check its tightness. After checking that the seal is intact, put the glass tube into a box-type resistance furnace for annealing treatment at 700 ° C ambient conditions, 15 Take out the glass tube and put it into 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 ...

Embodiment 2

[0026] The metal Fe, Nd, Cr with a purity greater than 99.5% is Fe in atomic ratio 17 Nd 1.6 Cr 0.4 ingredients. Put the prepared samples into the vacuum electric arc furnace, and repeat the operation of vacuuming, ventilation and washing for three times, and then fill a certain amount of argon as a protective gas, and start melting. Each sample is melted three times, and the melted samples are Put it into a quartz glass tube and carry out vacuum sealing operation. Put the glass tube into water to check its tightness. After checking that the seal is intact, put the glass tube into a box-type resistance furnace for annealing at 800°C. 12 Take out the glass tube and put it into 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 ...

Embodiment 3

[0028] The metal Fe, Nd, Cr with a purity greater than 99.5% is Fe in atomic ratio 17 Nd 1.5 Cr 0.5 ingredients. Put the prepared samples into the vacuum electric arc furnace, and repeat the operation of vacuuming, ventilation and washing for three times, and then fill a certain amount of argon as a protective gas, and start melting. Each sample is melted three times, and the melted samples are Put it into a quartz glass tube and carry out vacuum sealing operation. Put the glass tube into water to check its tightness. After checking that the seal is intact, put the glass tube into a box-type resistance furnace for annealing at 800°C. 12 Take out the glass tube and put it into 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 ...

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Abstract

The invention relates to a preparation method of a chromium-doped ferrous alloy wave-absorbing material. The preparation method comprises the following steps: mixing raw materials: Fe, Nd and Cr according to a certain atom ratio, melting the metals in an arc furnace; then sealing the alloy sample in a vacuum quartz glass tube, then placing the sealed quartz glass tube in a high-temperature environment to carry out a further homogenization treatment, quenching, taking out the alloy sample, mechanically and primarily grinding the alloy sample in a mortar, then transferring the alloy powder to a stainless steel ball-milling tank, carrying out high-energy ball milling under the protection of gasoline, after a while, pouring out the gasoline, taking out the alloy sample powder, drying the powder in the air so as to obtain the alloy micropowder wave-absorbing material.

Description

technical field [0001] The invention relates to a method for preparing a wave-absorbing material by using alloy micropowder, in particular to a method for preparing a chromium-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, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/26C22C33/04C21D1/26C21D1/18B22F1/00B22F9/04
Inventor 黄鹏腾
Owner 黄鹏腾
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