FATIMAH HAURA, . (2025) SINTESIS DAN KARAKTERISASI LAPISAN KOMPOSIT Ni-AlN-Al₂O₃ MENGGUNAKAN METODE ELEKTRODEPOSISI DENGAN VARIASI RAPAT ARUS PULSA. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.
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Abstract
Industri pelapisan logam telah berkembang pesat seiring dengan kemajuan dalam ilmu pengetahuan dan teknologi. Pada pelapisan, material yang digunakan harus tidak hanya kuat, tetapi juga memiliki ketahanan terhadap korosi dan aus. Oleh karena itu, telah dilakukan pembentukan, karakterisasi serta analisis pengaruh variasi rapat arus pulsa terhadap lapisan komposit Ni-AlN-Al₂O₃, variasi yang digunakan yaitu 0,3 mA/mm2, 0,4 mA/mm2, dan 0,5 mA/mm2. Proses elektrodeposisi dengan menggunakan temperatur sebesar 40 ℃ dan waktu pelapisan selama 30 menit. Sampel dianalisis morfologi dan komposisinya menggunakan SEM-EDS. Selanjutnya dianalisis dengan X-Ray Diffraction (XRD) untuk mengetahui struktur kristal dan ukuran kristal, serta dianalisis tingkat kekerasannya menggunakan metode kekerasan Vickers. Hasil karakterisasi menunjukkan bahwa morfologi permukaan paling halus diperoleh pada rapat arus 0,4 mA/mm2. Selain itu, peningkatan rapat arus menyebabkan penurunan ukuran kristal dan peningkatan kekerasan. Tingkat kekerasan optimum sebesar 1048,914 kgf/mm2 didapatkan pada lapisan komposit Ni-AlN-Al₂O₃ dengan rapat arus pulsa 0,4 mA/mm2. Dengan ini dapat dianalisa bahwa kekerasan meningkat seiring dengan peningkatan rapat arus pulsa, dan kekerasan kembali menurun saat mencapai rapat arus 0,5 mA/mm2.*****The metal coating industry has grown rapidly alongside advances in science and technology. In coating processes, materials must not only possess good mechanical strength but also resistance to corrosion and wear. Therefore, the formation, characterization, and analysis of the effect of pulse current density variations on Ni-AlN-Al₂O₃ composite coatings were conducted using current densities of 0,3 mA/mm2, 0,4 mA/mm2, and 0,5 mA/mm2. The electrodeposition process was carried out at 40 °C for 30 minutes. The morphology and composition of the samples were analyzed using Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS). X-ray Diffraction (XRD) was used to determine crystal structure and grain size, while Vickers hardness testing was applied to measure hardness levels. The results showed that the smoothest surface morphology was obtained at a current density of 0,4 mA/mm2. Additionally, increasing the current density led to smaller crystal sizes and higher hardness values. The optimum hardness of 1048.914 kgf/mm2 was achieved at 0,4 mA/mm2. These results indicate that hardness increases with increasing pulse current density but decreases again at 0,5 mA/mm2.
Item Type: | Thesis (Sarjana) |
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Additional Information: | 1. Prof. Dr. Esmar Budi, M.T. 2. Dr. Teguh Budi Prayitno, M.Si. |
Subjects: | Sains > Fisika |
Divisions: | FMIPA > S1 Fisika |
Depositing User: | Fatimah Haura . |
Date Deposited: | 14 Aug 2025 07:52 |
Last Modified: | 14 Aug 2025 07:52 |
URI: | http://repository.unj.ac.id/id/eprint/60579 |
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