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All Journal Jurnal Kolaboratif Sains Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Jurmas Azam Insan Cendikia
SB. Widia Rezaly Biharu Hayati
Prodi Teknik Mesin, Universitas Kebangsaan Republik Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Nursing Public Health Other

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Struktur dan Sifat Korosi Paduan Kobalt Akibat Penambahan Kromium (Cr) dengan Metode Metalurgi Serbuk: Structure and Corrosion Properties of Cobalt Alloys Due to the Addition of Chromium (Cr) with the Powder Metallurgy Method SB. Widia Rezaly Biharu Hayati
Jurnal Kolaboratif Sains Vol. 6 No. 9: SEPTEMBER 2023
Publisher : Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56338/jks.v6i9.4006

Abstract

Metalurgi serbuk adalah metode yang digunakan untuk mensintesis paduan berbasis kobalt untuk menghasilkan produk yang baik dengan geometri yang kompleks dan tahan korosi. Salah satu faktor penting dalam peningkatan ketahanan terhadap korosi yaitu dengan penambahan komposisi kromium (Cr). Sehingga pada penelitian ini dilakukan sintesis paduan kobalt menggunakan variasi Cr ( 28,5; 30; 31,5; 33 dan 34,5 dari % berat keseluruhan). Hasil uji XRD (X-Ray Diffraction) menunjukkan bahwa persentase fasa ? meningkat seiring dengan peningkatan komposisi Cr. Hasil uji SEM (Scanning Electron Microscopy) menunjukkan bahwa ikatan antar unsur yang baik terjadi pada komposisi Cr yang besar, yang ditandai dengan tampak permukaan yang lebih halus dan homogen. Hasil uji kekerasan menggunakan Microvickers menunjukkan bahwa nilai kekerasan paduan kobalt yang lebih tinggi terdapat pada kandungan kromium yang besar. Laju korosi yang dihasilkan sampel dengan variasi 31,5% sampai 34,5% Cr sesuai dengan standar Eropa yaitu 0,457 mpy karena tidak mengalami banyak retakan pada permukaannya, sehingga menghasilkan densitas (massa jenis) sampel yang lebih tinggi dan laju korosi yang lebih rendah.
SOSIALISASI PENGELOLAAN DISTRIBUSI AIR BERSIH DI DESA CIPAGERAN, CIMAHI UTARA Biharu Hayati, SB. Widia Rezaly; Erdiansyah, Erdiansyah; Suparyogi, Dudi; Hendrawan, Win; Suryaman, Suryaman; Andrianto, Nurman Bernard; Zakariya, Lutfi; Purwono, Edi
Azam Insan Cendikia Vol. 4 No. 3 (2025): Jurmas Azam Insan Cendikia
Publisher : Yayasan Azam Insan Cendikia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62833/pkm.v4i3.226

Abstract

masyarakat di Cipageran, Cimahi Utara. Kegiatan ini terlaksana pada hari Sabtu, tanggal 09 November 2024. Kegiatan ini melibatkan 35 warga Cipageran dan 10 orang mahasiswa Teknik Mesin Universitas Kebangsaan Republik Indonesia. Penyuluhan dilaksanakan oleh tim dengan metode presentasi kepada warga dan mahasiswa yang hadir yang berkumpul di rumah ketua RT setempat. Capaian akhir dari penyuluhan ini adalah meningkatnya pemahaman warga tentang proses ditribusi air sehingga air dapat digunakan untuk kolam lele dan kebutuhan sehari-hari, meningkatkan keterampilan dan peningatan penghasilan warga dari peningkatan produksi hasil olahan ikan lele dan distribusi air. Setelah melakukan kegiatan selama berada di Desa Cipageran, ditemukan beberapa rekomendasi untuk berbagai pihak yang terlibat dalam permasalahan di Desa Cipageran. Implementasi proses distribusi air bersih dari sumber ke kolam lele dan rumah-rumah warga akan dilaksanakan dengan melakukan kerja sama dengan pihak pemerintahan.
Morphological Characterization and Optical Properties of CIGS/TiO2 Thin Films Using Sputtering Technique Hayati, SB. Widia Rezaly Biharu; Erdiansyah, Erdiansyah; Hendrawan, Win
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 68 No 3 (2024): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v68i3.374

Abstract

Solar energy as a renewable energy source, is currently an important alternative to meet energy needs because of its unlimited amount and environmentally friendly. Almost the entire surface of the earth receives sunlight optimally, so breakthroughs are needed to transform the solar energy into electricity. In the research development process that was to develop advanced materials to support the development of alternative energy. Thin film synthesis was carried out using the Physical Vapor Deposition (PVD) of Direct Current (DC) Sputtering method on Indium Tin Oxide (ITO) substrates using Copper Indium Gallium Selenide (CIGS) and TiO2 with deposition time variations of 30, 45, and 60 minutes. Based on the test results, thin film surface with the largest grain size is 266.75 nm at CIGS/TiO2 45 minutes. This shows that more CIGS and TiO2 atoms are released from the target surface, forming clumps that cover the substrate surface along with the addition of deposition time. The longer the deposition time shows the higher the absorbance value. The highest absorbance value is 4.60873, which was achieved by 60 minutes CIGS/TiO2 sample with wavelength of 271 nm.
Effect of Deposition Time on CIGS/TiO2 Solar Cell Fabrication Using PVD Sputtering Method Hayati, SB. Widia Rezaly Biharu; Erdiansyah, Erdiansyah
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 69 No 3 (2025): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v69i3.569

Abstract

The CIGS (Copper Indium Gallium Selenide) thin film solar cells have been widely studied for a long time and have achieved an important position in the photovoltaic (PV) market. CIGS is one of the most promising materials for thin film solar cell applications. In this study, a thin film synthesis process was carried out on an ITO (Indium Tin Oxide) substrate using CIGS and TiO2 (titanium Dioxide) with deposition time variations of 30. 45 and 60 minutes using the PVD DC (Physical Vapor Deposition Direct Current) Sputtering method. Based on the test results, there was a shift in the diffraction peak along with the addition of the TiO2 layer, which indicated that the crystallization of ITO began to decrease and the TiO2 peak began to appear at deposition times of 45 minutes and 60 minutes. The formation of polycrystalline indicates good crystallization and surface uniformity. The highest layer thickness was obtained at a deposition time of 60 minutes, which was 426 nm, due to the particle agglomeration process on the substrate surface. The larger the particle agglomerates formed, the thicker the layer on the substrate surface. The results of the UV-Vis (Ultraviolet Visible) spectrophotometer test also showed that the overall band gap energy value corresponds to the ideal value for photovoltaic thin films, namely in the range of 1.04 eV to 3.5 eV.
Co-Authors Andrianto, Nurman Bernard Dudi Suparyogi Erdiansyah Erdiansyah Erdiansyah Fachry Abda El Rahman Purwono, Edi Win Hendrawan Zakariya, Lutfi