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All Journal Jurnal Akuakultur Indonesia JURNAL KIMIA SAINS DAN APLIKASI Jurnal Teknik Mesin Syntax Literate: Jurnal Ilmiah Indonesia JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Rekayasa Energi dan Mekanika Makara Journal of Science Makara Journal of Technology
Noviyanto, Alfian
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Journal : Makara Journal of Technology

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Effect of Milling on the Densification of SiC-BasedComposites from Polysilazane Noviyanto, Alfian; Nishimura, Toshiyuki
Makara Journal of Technology Vol. 20, No. 3
Publisher : UI Scholars Hub

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High density SiC-based composites from polysilazane were fabricated by high energy milling and hot pressing. After cross-linking at 200 °C, the polysilazane was pyrolysed at 1000 °C in N2 for 2 h to form amorphous Si-C-N-O followed by high energy milling for 1 h. Milled amorphous Si-C-N-O was sintered in hot pressing at 1600 and 1700 °C for 1 h in vacuum under the applied pressure of 50 MPa. Although no sintering additives were used, dense SiC-based composites were obtained with this method. Sintered density was 3.04 g/cm3, while only 2.57 g/cm3 for amorphous Si-C-N-O without milling. It is suggested that the liquid phase generated during the formation of Si2N2O facilitated the densification of the composite.
Mechanical Alloying-assisted Coating of Fe–Al Powders on Steel Substrate Noviyanto, Alfian; Harjanto, Sri; Widayatno, Wahyu Bambang; Wismogroho, Agus Sukarto; Amal, Muhamad Ikhlasul; Rochman, Nurul Taufiqu
Makara Journal of Technology Vol. 24, No. 3
Publisher : UI Scholars Hub

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The coating layer of Fe–Al powders on the steel substrate was prepared by mechanical alloying at room temperature. Fe, Al, and the steel substrates were milled with high-energy ball milling for 32 h with a ball-to-powder ratio of 8 in an argon atmosphere to prevent oxidation during milling. Although mechanical alloying was performed for 32 h, no new phases were observed after mechanical alloying, as analyzed by X-ray diffraction. However, the crystallite size of the milled powders for 32 h decreased by factor two compared with the initial powders. Scanning electron micrographs showed that the coating layers formed >8 h after mechanical alloying. The intermetallic Fe3Al formed after the substrate was annealed at 500 ℃.
Co-Authors Absirin, Muhammad Fahrurrozi Agus Sukarto Wismogroho, Agus Sukarto Ahmad Syarif Amal, Muhamad Ikhlasul Amalia, Ratih Angel, Julia Arrosyid, Bagas Haqi Ayu Pratiwi, Ayu Budi, Hanifah Setyaning Dedi Cahyadi Dwiarto, Agus Fahroji, Muhammad Handika, Gugus Hardi Junaedi HIDAYATULLAH, ARIEF Huda, Ihsanul Kartamiharja, Ujang Komarudin Asdani Kurniawan Kurniawan Mauladani, Syifa Nishimura, Toshiyuki Nurul Taufiqu Rochman Pandriana, Aap Prabowo, Wendy Tri Pratama, Aprian Fajar Rahmawati, Asri Ifani Ramdhani, Rizal Fauzuddin Noor Sagir Alva Saputra, Henry Kasmanhadi Saputra, Rizki Nugraha Saputro, Kurniawan Eko Setyaningsih, Lia Dwi Sri Harjanto Sukmarani, Galuh Wahyu Bambang Widayatno, Wahyu Bambang Yulianto Agung Rezeki Zulfi, Akmal