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Open AccessArticle

Fabrication of α-Fe/Fe3C/Woodceramic Nanocomposite with Its Improved Microwave Absorption and Mechanical Properties

1
College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
2
Changsha Research Institute of Mining and Metallurgy Limited Company, Changsha 410004, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(6), 878; https://doi.org/10.3390/ma11060878
Received: 15 April 2018 / Revised: 30 April 2018 / Accepted: 3 May 2018 / Published: 24 May 2018
(This article belongs to the Collection Advanced Biomass-Derived Carbon Materials)
Furan resin and fir powder pretreated by FeCl3 and aqueous ammonia solution were used to fabricate α-Fe/Fe3C/woodceramic nanocomposite. The bands of the pretreated wood powder were characterized by Fourier transform infrared spectroscopy (FTIR). The structural characterization of the nanocomposites was performed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The microwave absorption of the nanocomposites was measured by a vector network analyzer in the range of 2–18 GHz. The mechanical properties of the composites were also investigated. XRD and SEM results show that the α-Fe and Fe3C nanoparticles are in-situ generated and disperse in the matrix of the woodceramic. The diameters of these nanoparticles increase with the increasing of concentration of FeCl3 solution. The experimental results show that both the complex permittivity and the complex permeability of α-Fe/Fe3C/woodceramic nanocomposites increase as the concentration of FeCl3 solution increases. The composites pretreated with 0.60 mol·L−1 FeCl3 have the best absorption properties. The maximum value of reflection loss (RL) at 3 mm thickness reaches −25.60 dB at 10.16 GHz and the bandwidth below −10 dB is about 2.5 GHz. Compared to woodceramic, the bending strength and compressive strength of α-Fe/Fe3C/woodceramic nanocomposites increase by 22.5% and 18.7% at most, respectively. View Full-Text
Keywords: α-Fe; Fe3C; woodceramic; absorption properties; mechanical properties α-Fe; Fe3C; woodceramic; absorption properties; mechanical properties
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MDPI and ACS Style

Zhou, W.; Yu, Y.; Xiong, X.; Zhou, S. Fabrication of α-Fe/Fe3C/Woodceramic Nanocomposite with Its Improved Microwave Absorption and Mechanical Properties. Materials 2018, 11, 878.

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