PENGARUH VARIASI RAPAT ARUS PULSA TERHADAP KOMPOSISI DAN STRUKTUR MORFOLOGI LAPISAN KOMPOSIT NICKEL SILICON NITRIDE (Ni/Si3N4) MENGGUNAKAN METODE ELEKTRODEPOSISI

IRSYA LUTHFIAH RAMADHYAGITA, . (2024) PENGARUH VARIASI RAPAT ARUS PULSA TERHADAP KOMPOSISI DAN STRUKTUR MORFOLOGI LAPISAN KOMPOSIT NICKEL SILICON NITRIDE (Ni/Si3N4) MENGGUNAKAN METODE ELEKTRODEPOSISI. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

IRSYA LUTHFIAH RAMADHYAGITA. Pengaruh Variasi Rapat Arus Pulsa Terhadap Komposisi Dan Struktur Morfologi Lapisan Komposit Nickel Silicon Nitride (Ni/Si3n4) Menggunakan Metode Elektrodeposisi. Telah dilakukan proses pelapisan komposit dan karakterisasi analisis pengaruh variasi rapat arus pulsa terhadap lapisan komposit Ni/Si₃N₄ menggunakan metode elektrodeposisi. Variasi rapat arus pulsa yang digunakan yaitu 0,15 mA/mm², 0,25 mA/mm², dan 0,35 mA/mm². Proses elektrodeposisi dilakukan pada suhu 40°C dengan laju pengadukan 600 rpm selama 30 menit. Sampel dianalisis morfologi serta komposisinya menggunakan SEM-EDS. Selanjutnya, dianalisis struktur kristal serta ukuran kristal menggunakan X-ray Diffraction (XRD). Terakhir, nilai kekerasan dianalisis menggunakan Vickers Hardness Test. Hasil karakterisasi menunjukkan bahwa semakin tinggi rapat arus pulsa, semakin kasar morfologi permukaan lapisan komposit Ni/Si₃N₄ yang terbentuk. Selain itu, peningkatan rapat arus pulsa menyebabkan peningkatan ukuran kristal, namun menurunkan nilai kekerasan. Kekerasan Vickers optimal sebesar 1852,35 kgf/mm² didapatkan pada lapisan komposit Ni/Si₃N₄ dengan rapat arus pulsa 0,15 mA/mm². Dengan ini, dapat disimpulkan bahwa nilai kekerasan menurun seiring dengan peningkatan rapat arus pulsa. Kata-kata Kunci: Lapisan komposit Ni/Si3N4, elektrodeposisi, rapat arus pulsa, morfologi permukaan, komposisi. ***** IRSYA LUTHFIAH RAMADHYAGITA. Effect of Pulse Current Density Variation on the Composition and Morphological Structure of Nickel Silicon Nitride (Ni/Si3N4) Composite Layers Using Electrodeposition Method. A composite coating process and characterization analysis of the effect of pulse current density variations on Ni/Si3N4 composite coatings using the electrodeposition method have been conducted. The pulse current densities used were 0.15 mA/mm², 0.25 mA/mm², and 0.35 mA/mm². The electrodeposition process was carried out at 40°C with a stirring rate of 600 rpm for 30 minutes. The samples were analyzed for morphology and composition using SEM-EDS. Furthermore, crystal structure and size were analyzed using X-ray Diffraction (XRD). Finally, the hardness was evaluated using the Vickers Hardness Test. The characterization results show that higher pulse current densities lead to a rougher surface morphology of the Ni/Si3N4 composite coating. Additionally, increasing the pulse current density increases crystal size but decreases hardness. The optimum Vickers hardness of 1852.35 kgf/mm² was obtained for the Ni/Si3N4 composite coating with a pulse current density of 0.15 mA/mm². Thus, it can be concluded that hardness decreases as pulse current density increases. Keywords: Ni/Si3N4 composite layer, electrodeposition, pulse current, surface morphology, composition

Item Type:	Thesis (Sarjana)
Additional Information:	1). Dr. Esmar Budi, M.T 2). Dr. Teguh Budi Prayitno, M.Si
Subjects:	Sains > Sains, Ilmu Pengetahuan Alam Sains > Fisika
Divisions:	FMIPA > S1 Fisika
Depositing User:	Users 24437 not found.
Date Deposited:	12 Aug 2024 00:59
Last Modified:	12 Aug 2024 00:59
URI:	http://repository.unj.ac.id/id/eprint/49587

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