ANALISIS VARIASI RAPAT ARUS PULSA PADA PEMBENTUKAN DAN KARAKTERISASI LAPISAN KOMPOSIT Ni-TiN-Al2O3/Si3N4 DENGAN METODE ELEKTRODEPOSISI

FIONA FATIHA, . (2025) ANALISIS VARIASI RAPAT ARUS PULSA PADA PEMBENTUKAN DAN KARAKTERISASI LAPISAN KOMPOSIT Ni-TiN-Al2O3/Si3N4 DENGAN METODE ELEKTRODEPOSISI. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Dalam aplikasi industri, korosi menjadi faktor yang mempengaruhi kinerja dan masa pakai material. Salah satu solusi untuk mengatasi masalah korosi pada logam adalah dengan menerapkan metode pelapisan komposit. Pelapisan ini dilakukan dengan metode elektrodeposisi untuk menganalisis pengaruh variasi rapat arus pulsa pada pembentukan dan karakterisasi lapisan komposit Ni-TiN-AL2O3/Si3N4. Proses pelapisan dilakukan dengan rapat arus pulsa sebesar 0,3 mA/mm2, 0,4 mA/mm2 dan 0,5 mA/mm2, dilakukan selama 30 menit dengan temperatur 40 oC dan laju pengadukan 600rpm. Selanjutnya dilakukan karakterisasi Scanning Electron Microscopy - Energy Dispersive Spectroscopy (SEM-EDS) untuk menganalisis morfologi dan komposisi, lalu karakterisasi X-Ray Diffraction (XRD) untuk menganalisis struktur kristal serta ukuran kristal. Terkahir karakterisasi Vickers Hardness Test untuk menganalisis nilai kekerasan lapisan komposit Ni- TiN-AL2O3/Si3N4. Hasil penelitian menunjukkan bahwa semakin tinggi rapat arus pulsa, semakin halus morfologi permukaan lapisan komposit Ni-TiN-AL2O3/Si3N4 yang terbentuk. Selain itu, peningkatan rapat arus menyebabkan penurunan ukuran kristal dan peningkatan nilai kekerasan. Tingkat kekerasan optimum sebesar 1682,116 kgf/mm2 didapatkan pada lapisan komposit Ni-TiN-AL2O3/Si3N4 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 0,55 mA/mm2. Kata-kata kunci: Lapisan komposit Ni-TiN-AL2O3/Si3N4, Rapat arus pulsa, Elektrodeposisi. ***** In industrial applications, corrosion is a factor that affects the performance and service life of materials. One solution to address corrosion issues in metals is the application of composite coatings. This coating is carried out using the electrodeposition method to analyze the effect of pulse current density variations on the formation and characterization of Ni-TiN-AL2O3/Si3N4 composite coatings. The coating process was conducted using pulse current densities of 0.3 mA/mm2, 0.4 mA/mm2, and 0.5 mA/mm2 for 30 minutes at a temperature of 40 oC and a stirring rate of 600 rpm. Subsequently, Scanning Electron Microscopy - Energy Dispersive Spectroscopy (SEM-EDS) characterization was performed to analyze the morphology and composition, followed by X-Ray Diffraction (XRD) to analyze the crystal structure and crystal size. Finally, the Vickers Hardness Test was conducted to evaluate the hardness of the Ni-TiN-AL2O3/Si3N4 composite coating. The results show that the higher the pulse current density, the smoother the surface morphology of the Ni-TiN-AL2O3/Si3N4 composite coating. In addition, increasing the current density leads to a decrease in crystal size and an increase in hardness. The optimum hardness value of 1682.116 kgf/mm2 was achieved at a pulse current density of 0.4 mA/mm2. It can be concluded that the hardness increases with increasing pulse current density, but decreases again when the current density reaches 0.55 mA/mm2. Keywords: Ni-TiN-AL2O3/Si3N4 composite layer, Pulse current density, Electrodeposition.

Item Type: Thesis (Sarjana)
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: Fiona Fatiha .
Date Deposited: 13 Aug 2025 07:00
Last Modified: 13 Aug 2025 07:00
URI: http://repository.unj.ac.id/id/eprint/60749

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