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High-toughness corrosion-resistant FeCoNiCuAl high-entropy alloy wave-absorbing material as well as preparation method and application thereof

A high-entropy alloy and wave-absorbing material technology, which is applied in metallurgy and heat treatment of metal materials, and wave-absorbing materials, can solve problems such as poor wave-absorbing performance, non-corrosion resistance, and poor toughness, and achieve simple equipment, promotion of mutual dissolution, and reflection loss Improved effect

Active Publication Date: 2021-11-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a high-strength, toughness, corrosion-resistant FeCoNiCuAl high-entropy alloy absorbing material, its preparation method and application, to overcome the performance defects of traditional materials, such as low strength, poor toughness, no corrosion resistance, and poor absorbing performance. Bad question

Method used

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  • High-toughness corrosion-resistant FeCoNiCuAl high-entropy alloy wave-absorbing material as well as preparation method and application thereof
  • High-toughness corrosion-resistant FeCoNiCuAl high-entropy alloy wave-absorbing material as well as preparation method and application thereof
  • High-toughness corrosion-resistant FeCoNiCuAl high-entropy alloy wave-absorbing material as well as preparation method and application thereof

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Embodiment 1

[0040] A method for preparing a high-strength, toughness, and corrosion-resistant FeCoNiCuAl high-entropy alloy wave-absorbing material, comprising the following steps:

[0041] Step 1: After mixing iron powder, cobalt powder, nickel powder, copper powder, and aluminum powder with a purity of 99.9% according to an equiatomic ratio, place them in a ball mill tank, and use a vacuum pump to completely evacuate the inside of the ball mill tank. The ultra-low temperature liquid nitrogen planetary ball mill is used to pass nitrogen gas to the outer wall of the stainless steel ball milling tank, while rotating at high speed to mechanically alloy the inside of the stainless steel ball milling tank, thereby producing high-entropy alloy powder. In the initial stage, the ball milling rate was set to 150r / min for 4h, and then the rate was set to 300r / min for 60h.

[0042] Step 2: The ball-milled powder was placed in a vacuum oven at 72°C to remove excess ethanol. After drying, cold press...

Embodiment 2

[0046] A method for preparing a high-strength, toughness, and corrosion-resistant FeCoNiCuAl high-entropy alloy wave-absorbing material, comprising the following steps:

[0047] Step 1: Put iron powder, cobalt powder, nickel powder, copper powder, aluminum powder and other powders with a purity of 99.9% in an equiatomic ratio, mix the powder and place it in a ball mill tank, and use a vacuum pump to completely pump the inside of the ball mill tank Vacuum, ultra-low temperature liquid nitrogen planetary ball mill is used to pass nitrogen gas to the outer wall of the stainless steel ball mill, while rotating at high speed to mechanically alloy the inside of the stainless steel ball mill, thereby producing high-entropy alloy powder. In the initial stage, the ball milling rate was set to 150r / min for 8h, and then the rate was set to 300r / min for 60h.

[0048] Step 2: The ball-milled powder was placed in a vacuum oven at 72°C to remove excess ethanol. After drying, cold press and ...

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Abstract

The invention discloses a high-toughness corrosion-resistant FeCoNiCuAl high-entropy alloy wave-absorbing material as well as a preparation method and application thereof. High-entropy alloy powder is prepared through an ultralow-temperature liquid nitrogen planetary ball mill; and after drying, cold isostatic pressing is performed on a pressed blank, and microwave sintering is performed on the pressed blank to obtain the high-entropy alloy wave-absorbing material. A mode of combining a low-temperature ball milling process and microwave sintering is adopted. Alloyed powder with smaller particle size can be obtained through low-temperature ball milling, grains of the material are refined, particle distribution is more uniform, the internal structure is more compact, and the mechanical performance of the material is improved; and microwave sintering can be completed within a short alloying time, and crystal grains cannot grow excessively, so that the structure of the material is more compact, particles are finer, and finally, the material has the characteristics of high toughness, high wave-absorbing performance, corrosion resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and heat treatment of metal materials, and relates to the technical field of wave-absorbing materials, in particular to a high-strength, toughness-resistant, corrosion-resistant FeCoNiCuAl high-entropy alloy wave-absorbing material, a preparation method and an application. Background technique [0002] With the requirements of military defense and information leakage prevention, and in order to reduce the damage of electromagnetic pollution to human health and ecological environment, more and more materials are being studied to enhance the electromagnetic wave absorption capacity. [0003] High entropy alloy (HEA) is a kind of multi-component alloy composed of 5 or more main components, the concentration of each element is between 5% and 35%, because of its high entropy value, it can strengthen the interaction between elements. The mutual solubility of a large number of intermetallic compounds ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C30/02H05K9/00
CPCC22C1/04C22C30/02H05K9/0081Y02P10/25
Inventor 李桂荣周子成王宏明马志鸿赵倩珠王美芝
Owner JIANGSU UNIV
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