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All Journal Jurnal Sains Materi Indonesia Rekayasa Mesin FLYWHEEL : Jurnal Teknik Mesin Untirta Jurnal Spektra Omega: Jurnal Fisika dan Pendidikan Fisika Jurnal Penelitian Karet Science and Technology Indonesia Indonesian Journal of Chemistry Metalurgi JURNAL KAJIAN TEKNIK MESIN Jurnal Riset Sains dan Kimia Terapan Jurnal Konversi Energi dan Manufaktur Jurnal Ilmu Pengetahuan dan Teknologi (IPTEK) Automotive Experiences PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Makara Journal of Science Indonesian Journal of Physics (IJP) Aceh International Journal of Science and Technology Metalurgi AME (Aplikasi Mekanika dan Energi) : Jurnal Ilmiah Teknik Mesin Jurnal Sains Materi Indonesia Jurnal Elektronika dan Telekomunikasi
Bambang Soegijono
Departemen FMIPA, Universitas Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation Other

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Carbon Micron-size Content Dependency in Epoxy/Carbon Composite Coated onto SPCC Plate for Automotive Bodies Protection Anggrainy, Rani; Susetyo, Ferry Budhi; Lubi, Ahmad; Yudanto, Sigit Dwi; Rosyidan, Cahaya; Soegijono, Bambang; Ajiriyanto, Maman Kartaman; Kurniawan, Ova; Nanto, Dwi
Science and Technology Indonesia Vol. 9 No. 4 (2024): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.4.989-998

Abstract

Conventional epoxy coating for surface metal corrosion protection reported many unsolved technical problems. Adding filler in the epoxy could enhance the promising properties of the composite coating. Our work describes in detail the synthesizing and characterizing epoxy/carbon composite coating. Epoxy was mixed with thinner high gloss (HG) and hardener and stirred using a stirrer apparatus. After blending, various carbons were added (1 wt. %, 3 wt. %, and 5 wt. %) and then appropriately stirred. The different mixture composite was coated onto the steel plate cold rolled coiled (SPCC) plate using high-volume low-pressure (HVLP) in two passes. Various characterizations were performed, including crystallographic orientation, Infra-Red (IR)-spectra, surface morphology, thickness, hydrophobicity, hardness, and corrosion using X-ray diffraction (XRD), Fourier transform infrared (FTIR), Scanning electron microscopy (SEM), portable dry film coating thickness (DFT), digital camera, Vickers microhardness tester, and Potentiostat, respectively. More carbon micron-sized content led to elevate the peak intensity, surface bumpiness, and hydrophobicity. The uppermost external bumpiness and hydrophobicity values are 23.51 µm and 101◦. Hardness depends on carbon content and more carbon leads to an increase in the hardness of the composited coating. The highest average Vickers hardness value is 28.24 HV. The coating thickness influenced the corrosion rate, more coating thickness promoted lesser corrosion rate. The highest coating thickness (60.8 µm) promoted a corrosion rate of around 5.65×10−4 mmpy.
Creation and Evaluation of a Polyurethane/Carbon/Zinc Oxide Film Composite for Use as a Coating Material Kurniawan, Ova; Soegijono, Bambang
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 2 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.2.9

Abstract

The material used as a coating must have unique characteristics. A frequently used coating material is polyurethane. Even though Polyurethane has been widely used as a coating material, it has limitations in thermal resistance. Incorporating fillers such as carbon and ZnO can improve its thermal, dielectric, and corrosion-resistant properties. Composite films of polyurethane with carbon, ZnO, and a mixture of both were prepared. Characterizations included FTIR, TGA, DSC, XRD, dielectric testing, salt spray, water vapor permeability, hydrophobicity, and adhesion tests. FTIR confirmed the presence of functional groups from the fillers. TGA and DSC showed improved thermal stability, particularly in carbon-filled composites. Salt spray and permeability tests indicated enhanced corrosion resistance in ZnO-filled samples, while dielectric properties improved with carbon addition. Hydrophobicity and adhesion tests met coating material criteria. Among all variants, the polyurethane/carbon composite demonstrated the most favorable combination of thermal, dielectric, and surface properties, making it the most suitable for protective coating applications.
Layer Influence on Organosilica Composites Strength to Withstand the Impact of 9mm Caliber Bullets Notonegoro, Hamdan Akbar; Sofyan, Muhammad Azis; Rizkynawan, Benridho; Soegijono, Bambang; Setiawan, Jan; Aritonang, Sovian; Suherman, Andri; Ali, Nora'aini
Jurnal Sains Materi Indonesia Vol. 27 No. 1 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.10243

Abstract

The use of steel panels in conventional bulletproof vests is no longer relevant to current needs. In addition to being heavy, troop flexibility is disrupted. It is necessary to develop lighter and more reliable composite panels. The purpose of this study was to determine the ability of organosilica resin composite panels that were given variations of 5, 7 and 9 layers of woven fiberglass to withstand 9 mm caliber bullets using the NIJ-0101.06 Standard. The results of the firing test showed that the bullets were held back in the 7th and 9th layers. This result shows that this composite is a worthy candidate to replace conventional steel panels in bulletproof vests.
INVESTIGASI SIFAT DIELEKTRIK LAPISAN KOMPOSIT PVDF/ BATIO3/HAP DISINTESIS DENGAN METODE SPIN COATING Adnan, Septian Rahmat; Kurniawan, Budhy; Soegijono, Bambang; Erni, Nofi; Rachman, Taufiqur; Amperajaya, M. Derajat
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol. 11 No. 2 (2025)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/ame.v11i2.1635

Abstract

Pada penelitian ini larutan komposit PVDF/BaTiO3/HAp disintesis menggunakan material Polyvinylidene Fluoride (PVDF), Barium Titanat (BaTiO3) komersial dan Hydroxyapatite (HAp) yang disintesis dari tulang sapi. Selanjutnya larutan komposit disintesis menggunakan metode solution mixing dan dideposisi menggunakan metode spin coating pada subtrat tembaga (Cu), Silikon (Si) dan Platinum (Pt) pada kecepatan 2000 rpm, 3000 rpm dan 4000 rpm sebanyak 2 lapis untuk tiap sampel. Didapatkan bahwa kecepatan spin coating optimum pada 4000 rpm. Ketebalan dan kekasaran lapisan komposit PVDF/BTO/HAp yang dideposisi pada subtrat silicon (Si) dan Pt 2 lapis yaitu pada rentang 1,04 – 2,52 μm dan kekasaran < 0,1 μm. Dengan bertambahnya komposisi hydroxyapatite pada lapisan komposit PVDF/BTO/HAp dengan kecepatan spin coating 4000 rpm menyebabkan nilai impedasi, konstanta dielektrik dan dielectric loss (tg δ) dengan nilai konstanta dielektrik 15(100 Hz) pada komposisi komposit 35,83 Wt%:35,83 Wt%:28,34 Wt% dan 9 (100 Hz) pada komposisi 40 Wt%:40 Wt%: 20 Wt%, serta nilai dielectric loss (tg δ) 0,15 (100 Hz) dan 0,5 (100 Hz)  pada komposisi 35,83 Wt%:35,83 Wt%:28,34 Wt%. Nilai konstanta dielektrik dari lapisan komposit PVDF/BTO/HAp mengalami kenaikan dengan bertambahnya komposisi hydroxyapatite dari 20Wt% ke 28,34Wt% pada frekuensi rendah di rentang 10 – 1k Hz tetapi menurun pada frekuensi rendah direntang 10 – 100 Hz.
Microstructures, Magnetic Properties and Microwave Absorption Characteristics of Ti2+ -Mn4+Substituted Barium Hexaferrite Maykel Manawan; Azwar Manaf; Bambang Soegijono; Asep Yudi Hercuadi
Jurnal Elektronika dan Telekomunikasi Vol. 14 No. 1 (2014)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v14.15-19

Abstract

The effect of Ti2+-Mn4+substitution on microwave absorption has been studied for BaFe12-2xTixMnxO19 ferrite, where x varies from 0.2, 0.4, 0.6 and 0.8.Ti2+-Mn4+ ions were obtained from TiO and MnO2 precursors which were mechanically alloyed together with BaCO3 and Fe2O3 precursors. X-ray diffraction (XRD) patterns for sintered samples confirmed that the materials are consisted with single phase BHF structure. Unit cell volume and crystallite size was found increase with increasing x. Crystallite size for all samples below 70 nm, but the grain morphology shown that the grains is in range of 200 - 400 nm, which concluded that each grain are polycrystalline. The saturation magnetization is increases up to x = 0.4 and decrease for higher x values, while the coercivity remains decreases monotonically. These results were interpreted in terms of the site preferential occupation of Ti2+ and Mn4+ at low level substitution.These substitution revealed of enhanced reflection loss (RL) up to 25 dB forx=0.6.It suggested that the synthesized can be employed as effective microwave absorbers in various devices.
Rotating-Magnetic-Field-Assisted Electrodeposition of Copper for Ambulance Medical Equipment Syamsuir Syamsuir; Ferry Budhi Susetyo; Bambang Soegijono; Sigit Dwi Yudanto; Basori Basori; Maman Kartaman Ajiriyanto; Daniel Edbert; Evi Ulina Margaretha Situmorang; Dwi Nanto; Cahaya Rosyidan
Automotive Experiences Vol. 6 No. 2 (2023)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.9067

Abstract

This study examines the influence of the application of a rotating magnetic field in the electrodeposition of copper (Cu). During the electrodeposition, five constant magnets were rotated (500 and 800 rpm) towards the bottom of the sample. To investigate deposition rate, surface morphology, phase, structure, corrosion resistance, and hardness in deposited Cu using a weighing scale, a scanning electron microscope equipped with energy dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), potentiodynamic polarization, and hardness tester respectively. Bacterial activity was also evaluated through this research. Morphological surface observations showed that the increase in the rotational speed of the magnets during the electrodeposition process led to a smooth surface. A perfect Cu phase covers Al alloy with no oxide. The potentiodynamic polarization demonstrated by the increase in the rotating led to a shift to the more positive value of the corrosion potential. Moreover, the corrosion current also decreases with the increase in the rotating speed of the magnets. Less crystallite size promoted forming a higher hardness and inhibition zone of the Cu films.
Co-Authors A.A. Ketut Agung Cahyawan W Aditia Pradipta Akmal Johan Ali, Nora'aini Andika W. Pramono Andri Suherman Anggrainy, Rani Arief Ramadhan Arief Ramadhan Arief Sudarmaji Arief Syarifuddin Fitrianto Arief Syarifuddin Fitrianto Aritonang, Sovian Arsali Arsali Asep Yudi Hercuadi Asep Yudi Hercuadi, Asep Yudi Azwar Manaf Basori Basori Bintoro Siswayanti Budhy Kurniawan Cahaya Rosyidan Caing Caing Chandra, Johannes Daniel Edbert Decky J. Indrani Dhimas Satria Dona Sulistia Kusuma Dwi Nanto, Dwi Dwita Suastiyanti Edie Sasito, Edie Elman Panjaitan Emil Budianto Emil Budianto Erfan Handoko Evi Ulina Margaretha Situmorang Fendy Rokhmanto Ferry Budhi Susetyo Ferry Budhi Susetyo Ferry Budhi Susetyo Ganis Sanhaji, Ganis Gina Libria Nadjamoeddin Greida Frista Hamdan Akbar Notonegoro Hamdan Akbar Notonegoro Hamdan Akbar Notonegoro Hasanudin Gufron Fachrudin Ika Kartika Ika Kartika Isom Mudzakir, MSi. Iwan Sugiharto Iwan Sugihartono Jan Setiawan Kiky C. Sembiring Koji Yoneda Koji Yoneda, Koji Kurniawan, Ova La Ode Husein ZT La Ode Husein ZT, La Ode Lubi, Ahmad M Derajat Amperajaya M Yudi Masduky M. Hikam M. Hikam Maman Kartaman Ajiriyanto Maman Kartaman Ajiriyanto Manawan, Maykel Maryati Maryati Maulani, Mustamina Maykel Manawan Moch Iqbal Zaelana Muttahar Mohammad Khotib Muhamad Farid Muhammad Hikam Muhammad Hikam, Muhammad Muhammad Irfan Faturrohman Muhammad Irfan Faturrohman, Muhammad Irfan Musfirah Cahaya Fajrah Nababan, Frederik Gresia Naila Mubarok Nazarudin Koto Nino Rinaldi Nofi Erni Notonegoro, Hamdan Akbar Ordas Dewanto Ova Kurniawan Pius Sebleku Putra, Valentinus Galih Vidia Rakhman Sarwono Raksa, Teguh Yoga Ramlan Ramlan Renanto Putra Wijaya Rizkynawan, Benridho Rizqon Priyotomo Rizqon Priyotomo, Rizqon Rokhmanto, Fendy Samura, Lisa Septian Rahmat Adnan Septian Rahmat Adnan, Septian Setia Budi Sigit Dwi Yudanto Sofyan, Muhammad Azis Sovian Aritonang Sudaryanto Sudaryanto Suhariyanto Suhariyanto Suharso Suharso Suharso Suharso Sukarno Sukarno Surya Darma Susetyo, Ferry Budhi Sutrisno S Syamsuir Syamsuir Tarmizi Tarmizi TAUFIQUR RACHMAN, TAUFIQUR Widjaya, Robert Ronal Wisnu Purno Aji Wisnu Purno Aji, Wisnu Yosef Sarwanto Yudanto, Sigit Dwi Zainal Alim Mas&#039;ud Zainal Alim Mas’ud Zulkarnain Jalil Zulkarnain Jalil