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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 Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Indonesian Journal of Chemistry Jurnal Elektronika dan Telekomunikasi 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
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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Perilaku Ketahanan Korosi Komposit Coating Poliuretan/Silika/ Karbon Pada Baja Karbon Rendah Bambang Soegijono; Ferry Budhi Susetyo; Hamdan Akbar Notonegoro
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume V Nomor 1, April 2019
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.4775

Abstract

Salah satu problematika kendaraan bermotor saat ini adalah korosi. Umumnya cat pelindung akan cepat rusak karena disebabkan kondisi operasional kendaraan pada lingkungan yang tidak menentu. Komposit coating poliuretan dengan variasi silika/karbon disiapakan, kemudian diaplikasikan pada material baja karbon rendah dengan spray gun. Pada lapisan yang terbentuk di lakukan analisis Fourier Trasform Infra Red (FTIR), Thermogravimetry (TGA), Differential Scanning Calorimetry (DSC), Mikroskop Optik dan uji salt spray. Hasil FTIR, TGA, pengamatan optik dan uji salt spray menunjukkan semakin tinggi kadar karbon/silika maka akan semakin tahan terhadap korosi.
Mass Loss Pada Pemaduan Logam Ni-Fe-Mn-Al Metode Vacuum Arc Melting Furnace Terhadap Hume-Rothery Rules Hamdan Akbar Notonegoro; Bambang Soegijono; Sovian Aritonang; Sunardi Sunardi; Dhimas Satria
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume III Nomor 2, Oktober 2017
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (685.517 KB) | DOI: 10.36055/fwl.v2i1.2648

Abstract

Logam paduan merupakan material hasil campuran antar logam, atau antara logam dengan elemen lain, yang dibuat untuk menghasilkan sifat dan karakter material logam yang diinginkan. Material logam paduan yang dibuat menggunakanCompact Arc Melter MAM–1 memiliki resiko terbuangnya sejumlah bagian (mass loss) komposisisaat peleburan. Untuk itu perlu diidentifikasi pengaruh metode peleburan yang digunakan terhadapkondisi mass loss. Dari Hume-Rothery’s Rules diketahui bahwa perbedaan jari-jari atom dan elektron valensi antara elemen pelarut dan terlarut mempengaruhi besarnya mass loss yang terjadi. Dalam penelitian ini telah dibuat logam paduan sistem Ni20Fe30Mn32Al18 (at. %)menggunakan Compact Arc Melter MAM – 1 dengan dua variasi level busur. Ditemukan bahwa penggunaan busur api level 3 menghasilkan kehilangan massa yang lebih besar dari level 4. Namun, komposisi paduan yang diperoleh dengan busur api level 3 lebih proporsional terhadap komposisi yang direncanakan dibandingkan dengan busur api level 4, yang mengalami defisit kandungan Mn. Dengan demikian busur api level 3 digunakan untuk mendapatkan paduan dengan rasio komposisi (wt. %) proporsional dengan komposisi yang direncanakan.
Electrochemical Behavior, Structure, and Morphology of Electrodeposited Nickel on Copper Alloy Prepared from Sulfate Bath without Additive Addition Bambang Soegijono; Ferry Budhi Susetyo; Hamdan Akbar Notonegoro; Musfirah Cahaya Fajrah
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume VI, Nomor 1, April 2020
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v2i1.7724

Abstract

Nickel and nickel alloy has good chemical and physical properties to enhance corrosion resistance. Electrodeposited nickel layer are expected to enhance corrosion resistance of copper as substrates. The difference distance crystal plane of Nickel and Copper is about 0.02 – 0.03 Angstrom. The electrochemical behavior, structure and morphology of electrodeposited nickel on copper substrate in sulfate solution were investigated. Electrodepositions of nickel layer were conducted at room temperature with various current densities (10 mA/cm², 20 mA/cm², and 30 mA/cm²). Electrochemical behavior, structure, and morphology of the samples were analyzed by using potensiostat, x-ray diffraction (XRD), and Scanning electron microscope (SEM). The x-ray diffraction patterns show that the nickel has cubic FCC crystal system and space group Fm-3m.  The current density during electrodeposition influence crystal parameter, crystallite size and micro strain of nickel film deposited. Electrodeposited nickel with current density 30 m A/cm² shows the best corrosion resistance.
Effect Of Titanium On Corrosion Behavior Of Aluminum Alloy 3104 As a Candidate Material For Radiator Combustion Engines Arief Syarifuddin Fitrianto; Bambang Soegijono; Caing Caing; Hamdan Akbar Notonegoro
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume 7, Issue 1, April 2021
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v0i0.10855

Abstract

Aluminum Alloy 3104 is aluminum usually used for beverage can. By modifying the content of Titanium content in the alloy, it is expected that this material will be suitable for radiator engine combustion. Especially for its corrosion behavior in coolant solution. Aluminum alloy with different content of Titanium was investigated on its crystal structure, morphology and its corrosion behavior in ethylene glycol solution which is usually used as additive in coolant water. X-ray diffractometer, Electron microscope and potentiodynamic were used to investigate the crystal structure, morphology and corrosion behavior respectively. The results show (002) crystal plane dominate the surface of the sample as the Titanium increase. The (111) and (002) crystal plane are very low compare to (022) crystal plane. Crystallite size and micro strain are affected by addition of Titanium. Surface morphology are clearly affected by the addition of Titanium. Addition of Titanium causes corrosion behavior of the samples. It concludes that the aluminum alloy with different Titanium content in this research, can be used for making radiator combustion engine.
PERHITUNGAN KURVA HISTERESIS INTRINSIK MATERIAL ZINC OXIDE (ZnO) Septian Rahmat Adnan; Bambang Soegijono
Jurnal Konversi Energi dan Manufaktur Vol. 5 No. 1 (2018)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (358.518 KB) | DOI: 10.21009/JKEM.5.1.3

Abstract

Energi bebas Gibbs dan kurva polarisasi spontan dari Zinc Oxide (ZnO) dihitung menggunakan Teori Landau-Devonshire. Program komputasi untuk menghitung Energi bebas Gibbs dan kurva polarisasi spontan dibuat pada Delphi 6 . Dari hasil perhitungan menunjukan bahwa energi bebas Gibbs terendah terdapat pada ZnO doping Li 1%s yang menunjukan struktur kristal paling stabil.
Synthesis of Single Phase BaFe12O19 Nanoparticle by Sol-Gel Method Dwita Suastiyanti; Bambang Soegijono; Azwar Manaf
JURNAL ILMU PENGETAHUAN DAN TEKNOLOGI (IPTEK) Vol. 9 No. 1 (2014): Jurnal Ilmu Pengetahuan dan Teknologi (IPTEK)
Publisher : Institut Teknologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31543/jii.v9i1.51

Abstract

Barium hexaferrite BaFe12O19 (BHF) is a great importance as permanent magnets, particularly formagnetic recording as well as in microwave devices. Barium hexaferrite also could be used as one of the basic constituent compound of multiferroic material. Multiferroic is a class of materials that yieldsimultaneous effects of ferroelectric,ferromagnetism and ferroelasticity in the same material. So BHF must be as nanoparticle and single phase to increase magnetoelectric coupling effect showing improvement multiferroic properties in material. Barium hexaferrite powders were prepared by sol gel auto combustion method. Hence the mole ratios of Ba2+/Fe3+ were varied at 1:12; 1:11.5 and 1:11 and sintering at 850oC for 10 hours for each mole ratios. To confirm the formation of single phase, it was used X-Ray Diffraction (XRD) Phillips, PW 1835 type in the 20o-100o diffraction angle using CuKα radiation. XRD results showed that sample with mole ratios of Ba2+/Fe3+ = 1:11,5 was best sample due to having single phase, 100% BHF phase be evidenced by HighScore Plus Refinement. Using Particle Size Analyzer (PSA) from Beckman Coulter type showed that sample with mole ratios of Ba2+/Fe3+ = 1:11,5 was powder in nano size, 66 nm (<100 nm). This research confirms that sol-gel method using mole ratio of Ba2+/Fe3+ = 1:11,5 and sinter temperature at 850oC for 10 hours could be used for synthesize single phase BHF in nanoparticle.
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 : LIPI Press

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.
Pengamatan In-Situ Tekanan dan Temperatur pada Pembentukan MgH2/Ni melalui Metode Reactive Mechanical Alloying (RMA) untuk Aplikasi Material Penyimpan Hidrogen Erfan Handoko; Aditia Pradipta; Bambang Soegijono; Zulkarnain Jalil
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 02 (2014): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i02.4982

Abstract

The observation on reactive mechanical alloying (RMA) process had been done to form MgH2 material with adding Ni nanoparticles as catalist for hydrogen storage material applications. Pressure and temperature of material forming were recorded by microcontroller set for 30 minutes. Mg with adding Ni 5 wt % was milled by High Energy Ball Mill (HEBM) at H2 atmosphere in 1 atm of pressure. The measurement results showed that the pressure had been changed and temperature also changes up to 38oC. This process proves that the alloying betwen Mg and H2 had been formed. The X-ray diffraction pattern identify MgH2 phase. SEM image showed the morphology of MgH2 particles.
Microwave Assisted Cationic Polymerization of Different Type Palm Oils with Boron Trifluoride Ethereal Catalyst Muhamad Farid; Bambang Soegijono; Zainal Alim Mas’ud
Indonesian Journal of Chemistry Vol 19, No 1 (2019)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.296 KB) | DOI: 10.22146/ijc.26680

Abstract

Indonesia is a major producer of palm oils. However, more than 76% of the production is exported as crude palm oil (CPO) with low economic values. Chemical conversion is necessary to produce more valuable derivatives of renewable biobased material including a thermoplastic polymer. In this study, crude palm oils (CPO), refined-bleached deodorized palm oil (RBDPO) and refined bleached deodorized palm oil olein (RBDPOO) were converted under microwave-assisted cationic polymerization with the boron trifluoride ethereal catalyst. The precursors were irradiated using the commercial microwave with various reaction conditions. The raw material compositions, iodine values, and functional groups of the raw material and polymers were analyzed by gas chromatography, titrimetry, and Fourier Transform infrared spectrophotometry, respectively. The differential scanning calorimetric (DSC) was used to observe the thermal characteristics of the polymers. The iodine value of the resulting polymer products was lower than the raw materials which indicated the decrease of the C=C bonds due to the polymerization. This result is supported by the decreased intensity of alkene bands in the infrared spectra of the product. The DSC thermogram curve proved that the product is a thermoplastic polymer with a melting point ranged from 40.3 to 45.2 °C; and the freezing point of 22.5 to 28.1 °C. In conclusion, palm oil-based thermoplastic polymer was successfully synthesized and characterized, and the best result was achieved when using RBDPOO as starting material.
Growth, Electronic Structure, and Electrochemical Properties of Cubic BaTiO3 Synthesized by Low-Pressure Hydrothermal-Assisted Sintering Mohammad Khotib; Bambang Soegijono; Zainal Alim Mas&#039;ud; Gina Libria Nadjamoeddin
Indonesian Journal of Chemistry Vol 22, No 1 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.68978

Abstract

Cubic BaTiO3 was synthesized through low-pressure hydrothermal-assisted sintering using Ba(OH)2 and TiO2 as precursors with a mol ratio of Ba:Ti = 1.4:1. The single phase of cubic BaTiO3 was produced at a sintering temperature of 800 °C for 2, 4, 8, and 12 h. The absence of diffraction peak splitting at 2q of 45° was indicated cubic BaTiO3. The crystallite size of BaTiO3 ranged from 80–200 nm, and its size increased with increasing temperatures and sintering times. The micro-strain of the BaTiO3 crystal lattice had a range between 0.27 and 0.68%. The minimum bandgap on the indirect bandgap was about 1.75 eV from point M to Γ, while the direct bandgap was about 1.95 eV from Γ to Γ. Ti–O's interaction had a covalent character, while that of Ba–O had an ionic character based on the density of state (DOS) calculation. The characteristics of the BaTiO3 voltammogram show an irreversible redox mechanism with a more observable reduction peak in Ti4+/Ti3+. Higher current density at over potential indicated greater BaTiO3 capabilities in Oxygen Evolution Reaction (OER)-Oxygen Reduction Reaction (ORR) electrocatalysis. For that, purified cubic BaTiO3 offers potential application as an electrode for batteries, water splitting systems, and regenerative fuel cells.
Co-Authors A.A. Ketut Agung Cahyawan W Aditia Pradipta Adnan, Septian Rahmat 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, Daniel 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 Yudi Masduky M. Derajat Amperajaya M. Hikam M. Hikam 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 Musfirah Cahya Fajrah, Musfirah Cahya 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 Rahmat Adnan Septian Rahmat Adnan, Septian Setia Budi 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 Wardah, Amirah 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