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All Journal Quantum Teknika Indonesian Applied Physics Letters Journal of Materials Exploration and Findings
Ilham Nur Dimas Yahya
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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DIAMOND LIKE CARBON (DLC) COATING ON CARBON STEEL WITH PLASMA TECHNIQUES FOR GAS PIPES Ilham Nur Dimas Yahya; Djony Izak Rudyardj; Jan Ady
Indonesian Applied Physics Letters Vol. 1 No. 2 (2020): Desember
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v1i2.23446

Abstract

A study about coating on carbon steel by plasma technique aims to determine the variation of time and pressure on the hardness and corrosion strength of a material. The material used in this research was carbon steel with carbon chest of 0.245%. This carbon steel was a plasma technique process with a temperature of 300oC and various pressure variations, such as 1.2 mbar; 1.4 mbar; 1.6 mbar; 1.8 mbar; And 2.0 mbar. The highest hardness was found at 1.8 mbar pressure, which was 161.7 VHN. Then set with a temperature of 300oC and a pressure of 1.8 mbar and a time variation, which were 1 hour; 1.5 hours; 2 hours; 2.5 hours; 3 hours. The largest hardness value was obtained at 3 hours with a hardness value of 161.7 VHN. Then the corrosion test obtained the optimum value at 2 hours with a corrosion value of 0.69 mpy. This was because on the surface of carbon steel there was a layer of Diamond Like Carbon (DLC).
Characteristics of Sodium Lithium Titanate Synthesized at Different Solid-State Reaction Temperature for Lithium-Ion Battery Anode Yahya, Ilham Nur Dimas; Sofyan, Nofrijon; Khaerudini, Deni Shidqi; Timuda, Gerald Ensang; Priyono, Slamet
Journal of Materials Exploration and Findings Vol. 2, No. 3
Publisher : UI Scholars Hub

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Abstract

The effect of sintering temperature on the characteristics of sodium lithium titanate (NaLiTi3O7/NaLTO) synthesized at different solid-state reaction temperature and its performance as lithium-ion battery anode has been investigated. The precursors for the synthesis consisted of LiOH.H2O, TiO2, and NaHCO3. The synthesis was performed via solid-state reaction method. The precursors were mixed and sintered at variation temperatures of 900oC, 1000oC, and 1100oC for 2 hours under atmosphere condition. The final product was characterized using X-ray diffraction (XRD) and particle size analyzer (PSA). The XRD analysis showed the main phase of NaLTO with some impurities. PSA analysis showed that the sintering temperature has a significant effect on changes in particle size where the sample at a temperature of 1100oC has the largest particle size of 74.62 µm. The battery was fabricated by firstly mixing NaLTO powder with polyvinylidene fluoride (PVDF) and acetylene black (AB) in a ratio of 85:10:5 wt.% and the mix was then deposited onto copper foil to form NaLTO a sheet. The NaLTO sheet was cut into circular discs with a diameter of 14 mm and were arranged in a sequence of separator, metallic lithium, and electrolyte to form a coin cell in a glove box. Characterization using cyclic voltammetry (CV) and charge-discharge (CD) showed that the NaLTO sintered at 1000oC provided good electrochemical performance with the largest diffusion coefficient of 3.948 x 10-10 m2/s, Coulombic efficiency reached 100%, and a high specific capacity of 65.83 mAh/g.
Pengaruh Parameter Proses 3D Printing Tipe FDM Terhadap Kekasaran Permukaan Produk Menggunakan Filament Acrylonitrile Butadiene Stryene Pristiansyah; Indun; Hasdiansah; Soni Afriansyah; Ilham Nur Dimas Yahya; Ariyanto; Sugianto
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 7 No. 1 (2025): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v7i1.23894

Abstract

A recent development in the manufacturing sector is 3D printing technology. through the direct conversion of 3D computer-aided design (CAD) data into a tangible prototype using the concepts of additive manufacturing. The way that 3D printing technology constructs a prototype is layer by layer. Fibrous materials can be printed using fused deposition modeling (FDM) technology, which produces products with precise geometric properties. Using the Taguchi Method L27(33), three variants of the fixed A transparent ABS There were Three process parameters employed in the study: Nozzle Temperature, Build Plate Temperature, and Print Speed. Filament with a diameter of 1.75 was also used. This study makes use of an FDM Ender 3 Max 3D printer, which has dimensions of x300mm x300mm x350mm. This study's objective is to. The purpose of this study is to measure the surface roughness.test results. The study's experimental findings indicated that, for specimen 2 trials, the ideal roughness value was an average of 14, with the follow parameters, which include 50% print speed, 85°C for the build plate and 250°C for the nozzle temperature.
Co-Authors Ariyanto Deni Shidqi Khaerudini Djony Izak Rudyardj Gerald Ensang Timuda Hasdiansah, Hasdiansah Indun Jan Ady Nofrijon Sofyan, Nofrijon Pristiansyah, Pristiansyah Slamet Priyono Soni Afriansyah Sugianto