Preparation method of wave-absorbing stealth composite coating
A technology of composite coating and iron-based amorphous alloy, which is applied in the field of microwave-absorbing materials, can solve problems such as narrow microwave-absorbing bandwidth, unbalanced impedance matching characteristics, and unsatisfactory microwave-absorbing performance.
Active Publication Date: 2021-07-30
TIANJIN UNIV
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Problems solved by technology
However, when a single iron-based amorphous alloy is used as a wave-absorbing material, its impedance matching characteristics are unbalanced, and there are still shortcomings such as unsatisfactory wave-absorbing performance, large thickness, and narrow wave-absorbing bandwidth.
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[0023] The invention improves the microwave-absorbing properties of the alloy by adding graphene to the iron-based amorphous alloy to prepare composite materials, and provides a preparation method for preparing a microwave-absorbing stealth composite coating with small thickness, low density, wide absorption frequency band and strong microwave-absorbing ability. The method has the advantages of simple preparation process and low cost.
[0024] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] Step 1: According to Fe 85 Si 4 Cu 3 B 6 Nb 2 The mass fraction percentage is Fe, Si, Cu, B, Nb raw materials, the purity of the used raw materials is greater than 99.99%, and they are purchased from Beijing Zhongjinyan New Material Technology Co., Ltd. Most of the existing absorbing materials are iron and cobalt-based alloys,...
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Abstract
The invention relates to a preparation method of a wave-absorbing stealth composite coating. The preparation method comprises the following steps that Fe, Si, Cu, B and Nb raw materials are weighed according to the mass percentage of iron-based amorphous alloy Fe85Si4Cu3B6Nb2; the weighed raw materials are sequentially put into a vacuum melting furnace according to the sequence of high melting points to low melting points, argon serves as shielding gas, then the raw materials are heated to be completely melted and cooled, an iron-based amorphous alloy master ingot is obtained, and melting is repeated so that it can be guaranteed that the components of the iron-based amorphous alloy master ingot are uniform; pretreatment is conducted, and small blocks are prepared; the prepared small blocks are prepared into iron-based amorphous alloy micro powder by using a vacuum atomization method; iron-based amorphous / graphene composite powder is prepared; preheating treatment is conducted; and the obtained iron-based amorphous / graphene composite powder is sprayed on a base body through a supersonic flame spraying method, and finally the wave-absorbing stealth composite coating is obtained.
Description
technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a wave-absorbing stealth composite coating. Background technique [0002] Wave-absorbing materials can be used in military equipment, such as to realize the stealth of military aircraft, submarines and other military equipment, thereby improving the survival rate and combat capability of weapons and equipment in war; they can also be applied to industrial equipment, which can be used to improve electronic The anti-interference ability of the equipment, the enhancement of security and confidentiality and the realization of security protection. The research on absorbing materials mainly focuses on two aspects. On the one hand, it is pursuing high performance such as high absorption rate, light weight, and high temperature resistance, so as to meet the military's cutting-edge technology requirements such as anti-radar reconnaissance; on the other hand, i...
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IPC IPC(8): C23C4/129C23C4/06C23C4/02C22C45/02B22F9/08
CPCC23C4/129C23C4/06C23C4/02B22F9/082C22C45/02B22F2009/0848B22F2009/0824
Inventor 余建星刘欣余杨王福程李昊达黄凯航郭虎苏晔凡张凌波孙若珂
Owner TIANJIN UNIV