Microstructure evolution process of Ferro-Aluminum based sandwich composite for electromagnetic shielding |
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| Affiliation: | 1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. National Key Laboratory of Material Behaviors and Evaluation Technology in Space Environments, Harbin 150001, PR China;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Welding Production Technology National Key Laboratory, Harbin Institute of Technology, Harbin 150001, China;1. College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, PR China;2. Bionic and Micro/Nano/Bio Manufacturing Technology Research Center, School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, PR China;1. School of Materials Science and Engineering, Southeast University, Nanjing 211189, China;2. Jiangsu Key Laboratory for Advanced Metallic Materials, Nanjing 211189, China;3. Institute of Massive Amorphous Metal Science, China University of Mining and Technology, Xuzhou 221116, China;4. Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094, China;1. Department of Physics, B. S. Abdur Rahman Crescent Institute of Science and Technology, Chennai 600048, Tamil Nadu, India;2. Department of Physics, VIT-AP University, Amaravati Campus, Guntur 522501, Andhra Pradesh, India;1. College of Materials Science and Engineering, Nanchang University, Nanchang 330031, China;2. Dayou Technology Co., Ltd., Yichun 336000, China;3. Institute of Space Science and Technology, Nanchang University, Nanchang 330031, China |
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| Abstract: | In this paper, sandwich composite (SWC) with Fe–Al soft magnetic alloy sandwiched between pure iron substrates was proposed and fabricated by hot pressing and diffusion treatment. The microstructure evolution process of the composite was investigated. Fe/Fe2Al5/Fe diffusion couple was obtained at 700 °C and subsequently kept at 900 °C for further isothermal diffusion. During the diffusion reactive process, we confirmed that major FeAl2 and minor Fe4Al13 were produced when Fe2Al5 dissolved. After 10 h of diffusion treatment, FeAl and α-Fe(Al) were the only two intermetallic phases left. Except FeAl2, the thickness of each intermetallic layer held good parabolic relationship with the diffusion annealing time. |
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| Keywords: | Sandwich composite Diffusion Pure iron Electromagnetic shielding |
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