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Menampilkan 1–9 dari 9 artikel
Influence of Mixing Time on the Hardness and Structure of Local Clay-Based Crucibles
Rusiyanto
; Rifky Ismail
; Athanasius Priharyoto Bayuseno
; Daffa Agya Mahardika
; Fitriyana, Deni Fajar
; Wirawan Sumbodo
; Aldias Bahatmaka
Advance Sustainable Science, Engineering and Technology
Vol 8
, No 1
(2025)
Although clay crucibles are frequently utilized in regional industries, their inadequate mechanical strength often causes durability issues. This study investigates the influence of mixing duration on the Vickers hardness and macrostructure of crucibles composed of local clay, kaolin, and molasses. The composition was made up of 47.5% clay, 47.5% kaolin, and 5% molasses as a binder, with 15% water added relative to the total weight. Durations of 15, 30, and 45 minutes were evaluated to determine...
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Effect of Biomass Feedstock Granulometry on Thermophysical Characteristics of Charcoal Briquettes via Screw Extrusion
Samsudin Anis
; Jefri Bale
; Septian Eko Cahyanto
; Ninda Kurniadi
; Fitriyana, Deni Fajar
; M. Thooriq Anwar
; Januar Parlaungan Siregar
; Natalino Fonseca Da Silva Guterres
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
The present study investigates the impact of particle size variation (10, 18, 20, and 35 mesh) on the physical and thermal properties of charcoal briquettes from coconut shells manufactured with a screw-based extruder machine. The briquette manufacturing process involves crushing, mixing, molding, and drying. Assessments were conducted to ascertain friability, compressive strength, density, calorific value, volatile matter, ash content, fixed carbon, and water content. Comparable assessments wer...
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Effect of Natural Fiber Stacking Sequence on the Properties of Hybrid Composites for Drone Frame Applications
Janiviter Manalu
; Jefri Bale
; Khristhoper Aris Arianto Manalu
; Frans Augusthinus Asmuruf
; Fitriyana, Deni Fajar
; Nizar Alamsyah
; Januar Parlaungan Siregar
; Al Ichlas Imran
; Tezara Cionita
; Natalino Fonseca Da Silva Guterres
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
The present study highlights the effective utilization of waste fibers in structural composites for drone frame applications, offering a sustainable pathway for developing high-performance materials while simultaneously addressing the issue of textile waste pollution. This study investigates the effect of ramie and cotton fiber waste fabric stacking sequences on the physical and mechanical properties of composites for quadcopter drone frames. Waste fabric was selected as an eco-friendly material...
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Mechanical Performance of Epoxy Composite Reinforced with Wood Dust and Crumb Rubber Waste
Imran, Al Ichlas
; Siregar, Januar Parlaungan
; Cionita, Tezara
; Fitriyana, Deni Fajar
; Anis, Samsudin
; Dewi, Rozanna
; Junaedi, Thomas
; Wijayanto, Etanto Heiliano
; Prayogo, Wisnu
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 4
(2025)
The incorporation of wood dust and crumb rubber waste as filler in polymer matrix composite still requires in-depth evaluation of mechanical properties because they have different characteristics. This study evaluates the tensile, flexural, and hardness properties of epoxy composites reinforced with various fractions of wood dust and crumb rubber (5, 10, and 15%). The results showed that the composite with 5% crumb rubber produced the highest tensile strength of 15.52 MPa (CR5), while the highes...
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Mechanical Performance of Alkali-Treated Rattan Strips with Epoxy Coating for Sustainable Composite Applications
Kalatharan, Sujentheran Nair
; Imran, Al Ichlas
; Irawan, Agustinus Purna
; Siregar, Januar Parlaungan
; Cionita, Tezara
; Fitriyana, Deni Fajar
; Anis, Samsudin
; Dewi, Rozanna
; Setyoadi, Yuris
; Wisnu Prayogo
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 3
(2025)
The use of natural materials like rattan in eco-friendly composites is gaining attention in materials engineering. However, its hydrophilic nature and interaction with other materials can affect mechanical strength. This study investigates how variations in rattan size and alkali treatment influence the tensile properties of single rattan strips through an epoxy dipping process. Rattan was prepared with varying lengths (5–15 cm), widths (3–8 mm), and a consistent thickness (0.5 mm). Alkali treat...
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1 Sitasi
Effect of Firring Heating Rate on the Density, Porosity, Vickers Hardness and Microstructure of the Crucible Specimens
Rusiyanto, R.
; Meiartha, REGA
; Fitriyana, Deni Fajar
; Sudiyono, S.
; setiadi, rizki
; Siregar, Januar Parlaungan
; Ansori, CHUSNI
Majalah Ilmiah Momentum
Vol 20
, No 1
(2024)
Failure in the results of making the crucible is cracking and even deformation. Cracks that occur can cause fluid leakage when melting so that it disrupts the casting process. The quality of the crucible can be influenced by factors including the selection of constituent materials, particle size, the amount of pressure, and the length of the firring process of heat treatment and cooling in the furnace. This study aims to determine the effect of heating rate on crucible made from clay and kaolin...
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Pengaruh Fraksi Volume Sekam Padi, Aluminium Oksida dan Besi Oksida Terhadap Sifat Mekanik Kampas Rem dengan Matriks Epoxy
Fitriyana, Deni Fajar
; Widodo, Rahmat Doni
; Kriswanto, Kriswanto
; Athoillah, Ahmad
; Prasetyo, Ares Yudi
; Alrasyid, Mochamad Dzaki
; Aripin, Muhammad Bustanul
; Dimyati, Saeful
; Irawan, Agustinus Purna
; Cionita, Tezara
; Siregar, Januar Parlaungan
Majalah Ilmiah Momentum
Vol 19
, No 2
(2023)
Penelitian tentang material alam sebagai pengganti material asbes dalam komposit material gesek kampas rem motor terus mengalami peningkatan. Material dalam kategori biomassa sebagai reinforcement komposit agar mendapatkan karakteristik material yang sesuai standar material gesek kampas rem motor. Penelitian ini bertujuan untuk mengetahui pengaruh fraksi volume sekam padi, aluminium oksida, dan besi oksida terhadap sifat mekanik dari spesimen komposit material gesek kampas rem. Proses pembuatan...
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PENGARUH KONSENTRASI NaOH TERHADAP UKURAN KRISTAL ZEOLIT A YANG DISINTESIS DARI LIMBAH GEOTHERMAL
Fitriyana, Deni Fajar
; Sulardjaka, Sulardjaka
; Iskandar, Norman
; Zulfikar, Muhammad
Majalah Ilmiah Momentum
Vol 14
, No 2
(2018)
Telah dilakukan sintesis zeolite berbahan dasar limbah geothermal dari Pembangkit Listrik Tenaga Panas Bumi (PLTP) Geo Dipa Energi, Dieng, Wonosobo, Jawa Tengah. Penelitian ini bertujuan untuk meneliti pengaruh konsentrasi NaOH terhadap karakteristik zeolit yang disintesis dari limbah geothermal. Sebelum digunakan sebagai bahan dasar sintesis, lumpur geothermal terlebih dahulu dilakukan kalsinasi pada suhu 850oC selama 3 jam. Sintesis menggunakan metode hydrothermal pada suhu100oC selama 4 jam d...
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ANALISIS KONDISI PEMESINAN IDEAL UNTUK MENCAPAI UMUR OPTIMAL DARI ROUTING CUTTER DIAMETER 32 mm DAN SLOT DRILL 25 mm PADA MESIN CNC DMC 210 U
Fitriyana, Deni Fajar
; Sulardjaka, Sulardjaka
; Iskandar, Norman
; P. S, Pratama Eka
; Dzulfikar, Muhammad
Majalah Ilmiah Momentum
Vol 14
, No 2
(2018)
Teknologi pemesinan kecepatan tinggi (high speed machining) merupakan salah satu alternatif untuk meningkatkan produktivitas disuatu proses pemesinan. Mesin kecepatan tinggi yang digunakan di PT X adalah mesin CNC DMG Mori DMC 210U yang merupakan mesin CNC 5 axis. Namun dalam aplikasinya, mesin DMG Mori DMC 210 U ini masih belum dapat bekerja secara maksimal. Salah satu penyebabnya adalah umur pahat yang belum optimal. Tujuan dari penelitian ini adalah untuk mengetahui kondisi pemesinan yang ses...
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