Influence of fiber weave geometry and Fe3O4content on the electromagnetic shielding behavior of CFRP composites
Materialpruefung/Materials Testing, cilt.68, sa.10, ss.1986-2008, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 68 Sayı: 10
- Basım Tarihi: 2026
- Doi Numarası: 10.1515/mt-2026-0081
- Dergi Adı: Materialpruefung/Materials Testing
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex
- Sayfa Sayıları: ss.1986-2008
- Anahtar Kelimeler: carbon fiber, CFRP, electromagnetic interference shielding effectiveness, Fe3O4, impact strength
- Bursa Uludağ Üniversitesi Adresli: Evet
Özet
This study examines the electromagnetic interference (EMI) shielding effectiveness (SE) of carbon fiber reinforced polymer (CFRP) composites enhanced with magnetite (Fe3O4). Three carbon fiber weave architectures-twill, plain, unidirectional-were produced with 5, 10, and 15wt.% Fe3O4 to evaluate the effects of fiber orientation and filler content on shielding performance. Measurements were conducted under near-field (NF) and far-field (FF) conditions in the 4-6GHz range using free-space techniques and a vector network analyzer. Reflection, absorption, and transmission characteristics were analyzed alongside complex permittivity, permeability, dielectric and magnetic loss tangents, and frequency-dependent electrical conductivity to clarify material-wave interactions. Fe3O4 powders were characterized by X-ray fluorescence (XRF) and X-ray diffraction (XRD), while composite morphology was examined via scanning electron microscopy. Mechanical behavior was assessed through impact testing. The 5wt.% Fe3O4 twill composite achieved the highest NF shielding (54.66dB), whereas the 10wt.% Fe3O4 unidirectional sample showed the best FF performance (49.27dB). Unidirectional composites exhibited the greatest impact strength, peaking at 1.6096kJ/m2 for the 10wt.% sample. Results indicate that twill architecture improves local field disruption at lower filler levels, while unidirectional geometry enhances FF performance through anisotropic conductive pathways. Excessive Fe3O4 loading (15wt.%) led to performance saturation, indicating an optimal reinforcement threshold.