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All Journal Rotasi Rekayasa Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Ilmu Fisika Journal of Engineering and Technological Sciences
Wibawa Endra Juwana, Wibawa Endra
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret
Aerospace Engineering Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : Jurnal Ilmu Fisika

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Effect of Freshwater and Seawater Immersion on Mechanical Properties and Pre-Immersion Magnetic Response of Silicone Rubber–Magnetite Composite Magnets Wibowo, Wibowo; Santoso, Nehemia Herbert; Ramadhan, Brilliano Wahyu; Juwana, Wibawa Endra; Kaavessina, Mujtahid
Jurnal Ilmu Fisika Vol 18 No 1 (2026): March 2026 (Forthcoming Issue)
Publisher : Jurusan Fisika FMIPA Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.18.1.25-34.2026

Abstract

Magnetite (Fe₃O₄) and RTV 48 silicone rubber-based magnetic composites have potential for outdoor applications due to their flexible and tunable magnetic properties. This study investigates the effect of immersion for 14 days in fresh water and seawater on its mechanical, magnetic, and thermal properties. Specimens were made by mixing 70 wt% Fe₃O₄ powder into RTV 48 matrix, then tested for hardness using Shore A durometer, magnetic properties using Vibrating Sample Magnetometer (VSM), and thermal stability using Thermogravimetric Analysis (TGA). Results showed a decrease in surface hardness due to matrix degradation by water penetration. The magnetic properties continued to exhibit soft magnetic characteristics with low coercivity and remanence. TGA analysis revealed changes in thermal degradation patterns, signaling chemical interactions between the material and the wet environment. These findings suggest that exposure to water can affect the long-term performance of Fe₃O₄-RTV 48 composites, making moisture resistance an important aspect for their outdoor applications.
Co-Authors Afisna, Lathifa Putri Budi Kristiawan, Budi Deendarlianto Enoki, Koji Indarto Indarto Indri Yaningsih Mohamad Muqoffa Mujtahid Kaavessina, Mujtahid Nugroho, Fellando Martino Prasojo, Arfi Singgih Rachmanto, Rendy Adhi Ramadhan, Brilliano Wahyu Santoso, Nehemia Herbert Suyitno Suyitno Tri Istanto Ubaidillah Ubaidillah Wibowo Wibowo Wijayanta, Agung Tri