Defect and Diffusion Forum
ISSN: 1662-9507, Vol. 400, pp 146-151
doi:10.4028/www.scientific.net/DDF.400.146
© 2020 Trans Tech Publications Ltd, Switzerland
Submitted: 2019-10-12
Accepted: 2019-11-11
Online: 2020-03-31
X-Band Electromagnetic Characterization of Fe72Al23V5 Based
Nanocomposites
F. Otmane1,a*, Z. Hamlati1,2,b, B. Rekioua3,c, A. Maali4,d and M. Azzaz2,e
1Laboratoire
2Laboratoire
des Sciences Aéronautiques, Université de Blida 1, Algérie
de Science et Génie des Matériaux, USTHB, Bab-Ezzouar, Algérie
3Laboratoire
4Laboratoire
a*
Radar, EMP Bordj El Bahri, Algérie
Télécommunications, EMP Bordj El Bahri, Algérie.
fotmane-aerospatiale@univ-blida.dz, bzhamlati@gmail.com, cbadreddinerekioua@gmail.com,
d
abdelmadjid.maali@esiee.fr, emazzaz@usthb.dz
Keywords: Mechanical Alloying, nanostructured metallic powders, Scanning Electron Microscopy,
Dielectric Permittivity, Magnetic Permeability,
Abstract. Determination of the electromagnetic parameters is an important tool to evaluate the
microwave-absorbing characteristic of a novel material. In this context, our research was carried out
to investigate the electromagnetic parameters of nanocomposites samples obtained by inclusion of
nanostructured Fe72Al23V5 powders in a resin matrix.
Nanostructured Fe72Al23V5 powders were synthesized by high-energy mechanical alloying (MA)
route and characterized using a scanning electron microscopy (SEM). The nanostructured
Fe72Al23V5 powders were dispersed in an epoxy resin matrix. Nanocomposites bulk samples of
rectangular section and given thickness were shaped for electromagnetic characterization in an
X-band metallic rectangular waveguide. Electromagnetic characterization was performed in terms
of measured Sij scattering parameters. Dielectric permittivity and magnetic permeability spectra
were extracted over the microwave X-band via the transmission/reflection technique. Obtained
results exhibit how the nature and size of the inclusions affect the electromagnetic parameters in the
X-band frequencies.
Introduction
The X-band frequencies is an important microwave range for defence applications such as short
range tracking, missile guidance, mapping, marine radar and airborne intercept [1]. The
development of radar absorbing materials has been reviewed in several papers and books [2, 3].
Progress in this area is related to the development of materials with improved properties or new
materials. With the arrival of nanotechnology, the challenge nowadays is to provide new materials
that meet the requirements of lightweight, ease processing and shielding and microwave absorbing
effectiveness. Accordingly, Mechanical Alloying (MA) is a completely solid state processing
technique able to synthesize both equilibrium and metastable phases of commercially and scientific
use [4].
The objective of this study is to investigate the electromagnetic properties of dielectric-metallic
mixtures in the microwave X-band. Mixtures consist of nanostructured Fe72Al23V5 by mechanical
alloying route dispersed in an epoxy resin matrix. The novel materials are characterized in terms of
morphology, dielectric and magnetic properties using adequate techniques.
Experimental Section
In this section, we describe the synthesis process, morphology characterization and
electromagnetic measurements. For the preparation of nanostructured Fe72Al23V5 powders, the
mechanical alloying technique was adopted. The process was carried out by loading a mixture of
elemental Fe (99.9% of purity, less than 50 µm of particle size), Al (99.5% of purity, less than
15 µm of particle size), V (99.7% of purity, less than 45 µm of particle size) and 16 hardened steel
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