Authors
1
Graduate Education Center, Shahid Sattari University of Aeronautical Sciences and Technology, Tehran, Iran
2
Assistant Professor, Department of Aerospace Engineering, Shahid Sattari University of Aeronautical Science and Technology, Tehran, Iran
3
Associated Professor, Department of Mechanical Engineering, Faculty of Engineering, Kharazmi University, Tehran, Iran
4
Associated Professor, Department of Aerospace Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
10.22044/jsfm.2026.17219.4032
Abstract
In today's world, the unprecedented increase in the need to use electromagnetic waves in complex industrial networks and modern communications, on the one hand, and the development of advanced military and civilian radar systems, on the other hand, has highlighted the necessity of obtaining an absorbent material with wide electromagnetic performance for use in aerospace structures along with high mechanical strength. In this paper, the effect of Fe₂O₃ powder filler on the mechanical and electrical properties of epoxy polymer/Fe₂O₃ powder composites has been investigated. In order to achieve optimal properties, samples with different weight percentages were fabricated. Subsequently, tensile and three-point bending tests were performed to determine the mechanical properties of the produced composites, and dielectric constant tests were conducted to determine the electrical properties. Finally, the mechanical and electrical properties of the samples with different weight percentages were compared with those of pure epoxy resin. The results showed that the maximum reflection losses measured for pure resin, 37.5 wt% Fe₂O₃ powder, and 75 wt% Fe₂O₃ powder were -1.9, -7, and -8.1 dB, respectively. The maximum tensile strength of pure resin, 37.5 wt% Fe₂O₃ powder, and 75 wt% Fe₂O₃ powder was 30, 26, and 23 MPa, respectively. The maximum flexural strength for pure resin, 37.5 wt% Fe₂O₃ powder, and 75 wt% Fe₂O₃ powder was 82.7, 71.9, and 68.5 MPa, respectively. The results indicate that adding Fe₂O₃ powder filler to the resin had a positive effect on its electrical properties but reduced its mechanical properties.
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