Prasetyo, Muhammad Fathur (2026) Pengaruh Jenis Matriks dan Ketebalan Lapisan Terhadap Nilai Reflection Loss dan Ketahanan Adhesi Radar Absorbing Coating dengan Filler BaFe10.2Cu0.6Ni0.6Zn0.6O19@PANI. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pengembangan Radar Absorbing Material (RAM) berbasis coating diperlukan untuk menurunkan pantulan gelombang elektromagnetik pada rentang X-band, sekaligus mempertahankan ketahanan mekanik lapisan pada substrat logam. Penelitian ini bertujuan menganalisis pengaruh jenis matriks epoxy dan polyurethane serta variasi ketebalan 2 mm, 4 mm, dan 6 mm terhadap nilai reflection loss dan ketahanan adhesi radar absorbing coating berbasis BaFe10.2Cu0.6Ni0.6Zn0.6O19@PANI. Penelitian ini menggunakan metode eksperimental kuantitatif dengan desain komparatif. BaM terdoping Cu, Ni, dan Zn disintesis melalui metode kopresipitasi, PANI melalui chemical oxidative polymerization, dan BaM@PANI melalui in situ polymerization. Coating dibuat pada substrat baja A36 menggunakan konfigurasi double layer Dallenbach dengan perbandingan filler dan matriks 15:85 wt%. Karakterisasi dilakukan menggunakan XRD, SEM-EDX, permagraph, FTIR, LCR meter, Vector Network Analyzer pada frekuensi 8-12 GHz, serta uji adhesi pull-off. Data dianalisis secara deskriptif-komparatif berdasarkan perubahan struktur, morfologi, konduktivitas, reflection loss, dan nilai adhesi. Hasil XRD menunjukkan fasa BaFe12O19 terdoping sebesar 51% dengan fasa Fe2O3 sebesar 49%. BaM@PANI memiliki konduktivitas 0,0067 S/cm. Hasil VNA menunjukkan polyurethane 6 mm menghasilkan performa penyerapan terbaik dengan reflection loss -21,90 dB pada 8,00 GHz dan absorpsi teoritis 99,35%. Peningkatan ketebalan membuat nilai reflection loss semakin negatif, tetapi menurunkan adhesi. Epoxy memiliki adhesi lebih tinggi pada seluruh ketebalan, yaitu 0,95 MPa, 0,91 MPa, dan 0,80 MPa, sedangkan polyurethane sebesar 0,84 MPa, 0,64 MPa, dan 0,42 MPa. Seluruh sampel menunjukkan cohesive failure. Penelitian ini menunjukkan bahwa polyurethane lebih unggul untuk penyerapan gelombang radar, sedangkan epoxy lebih stabil secara adhesi
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The development of coating-based Radar Absorbing Materials (RAM) is required to reduce electromagnetic wave reflection in the X-band frequency range while maintaining the mechanical durability of the coating on metallic substrates. This study aims to analyze the effect of epoxy and polyurethane matrices, as well as coating thickness variations of 2 mm, 4 mm, and 6 mm, on the reflection loss and adhesion strength of radar absorbing coatings based on BaFe10.2Cu0.6Ni0.6Zn0.6O19@PANI. This research used a quantitative experimental method with a comparative design. Cu, Ni, and Zn doped BaM was synthesized using the coprecipitation method, PANI was synthesized through chemical oxidative polymerization, and BaM@PANI was prepared via in situ polymerization. The coatings were applied onto A36 steel substrates using a double-layer Dallenbach configuration with a filler to matrix ratio of 15:85 wt%. Characterization was conducted using XRD, SEM-EDX, permagraph, FTIR, LCR meter, Vector Network Analyzer at 8-12 GHz, and pull-off adhesion testing. The data were analyzed descriptively and comparatively based on structural changes, morphology, conductivity, reflection loss, and adhesion strength. XRD results showed that the doped BaFe12O19 phase reached 51%, while the Fe2O3 secondary phase reached 49%. BaM@PANI showed an electrical conductivity of 0.0067 S/cm. VNA results indicated that the 6 mm polyurethane sample achieved the best absorption performance, with a reflection loss of -21.90 dB at 8.00 GHz and a theoretical absorption of 99.35%. Increasing coating thickness made the reflection loss more negative but reduced adhesion strength. Epoxy showed higher adhesion at all thicknesses, namely 0.95 MPa, 0.91 MPa, and 0.80 MPa, while polyurethane reached 0.84 MPa, 0.64 MPa, and 0.42 MPa. All samples showed cohesive failure. This study indicates that polyurethane is superior for radar wave absorption, while epoxy provides more stable adhesion performance
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Radar Absorbing Coating (RAC), BaFe10.2Cu0.6Ni0.6Zn0.6O19@PANI, Rugi Refleksi, Adhesi, Dallenbach Layer, Reflection Loss, Adhesion |
| Subjects: | Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QC Physics > QC765 Magnetic materials |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Fathur Prasetyo |
| Date Deposited: | 23 Jul 2026 05:13 |
| Last Modified: | 23 Jul 2026 05:13 |
| URI: | http://repository.its.ac.id/id/eprint/136613 |
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