PEMBENTUKAN DAN KARAKTERISASI LAPISAN KOMPOSIT Ni-TiN-AlN-Al2O3 DENGAN METODE ELEKTRODEPOSISI ARUS PULSA

RANGGA ADITYA PRATAMA, . (2025) PEMBENTUKAN DAN KARAKTERISASI LAPISAN KOMPOSIT Ni-TiN-AlN-Al2O3 DENGAN METODE ELEKTRODEPOSISI ARUS PULSA. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Penggunaan logam dalam industri terus meningkat karena kekuatannya, namun sifat rentan terhadap korosi dan keausan menuntut perlindungan tambahan. Salah satu solusinya adalah pelapisan komposit. Penelitian ini bertujuan untuk mengembangkan lapisan komposit berbasis nikel yang diperkuat partikel keramik TiN, AlN, dan Al2O3 guna meningkatkan sifat mekanik dan ketahanan aus pada substrat tungsten karbida (WC). Metode elektrodeposisi pulsa digunakan karena mampu menghasilkan struktur mikro yang halus dan pengendalian pertumbuhan kristal yang lebih baik. Variasi rapat arus pulsa yang digunakan adalah 0,3 mA/mm2, 0,4mA/mm2, dan 0,5 mA/mm2, dengan parameter tetap berupa suhu 40 °C, waktu 30 menit, dan laju pengadukan 600 rpm. Karakterisasi dilakukan melalui analisis Scanning Electron Microscopy–Energy Dispersive Spectroscopy (SEM–EDS), X-ray Diffraction (XRD), serta pengujian kekerasan mikro-Vickers. Hasil penelitian menunjukkan bahwa variasi rapat arus pulsa memengaruhi pertumbuhan kristal dan distribusi partikel penguat dalam matriks nikel. Rapat arus 0,4 mA/mm2 menghasilkan kristalit nikel yang halus, nilai kekerasan tertinggi, serta morfologi permukaan yang homogen dengan distribusi partikel yang merata dan minim cacat. Pada 0,3 mA/mm2, lapisan yang terbentuk menunjukkan permukaan kasar dan distribusi partikel yang tidak seragam, sedangkan pada 0,5 mA/mm2 terjadi pertumbuhan partikel berlebih yang menurunkan kekerasan. Dengan demikian, rapat arus 0,4 mA/mm2 dinyatakan sebagai kondisi paling efektif dalam proses pelapisan. *********************************************************** The use of metals in industry continues to increase due to their strength; however, their susceptibility to corrosion and wear requires additional protection. One effective solution is the application of composite coatings. This study aims to develop a nickel-based composite coating reinforced with ceramic particles TiN, AlN, and Al2O3 to enhance the mechanical properties and wear resistance of tungsten carbide (WC) substrates. The pulse electrodeposition method was employed due to its ability to produce fine microstructures and better control over crystal growth. The current density variations used were 0.3 mA/mm2, 0.4 mA/mm2, and 0.5 mA/mm2, with constant parameters of 40 °C, 30 minutes deposition time, and a stirring rate of 600 rpm. Characterization was conducted using Scanning Electron Microscopy–Energy Dispersive Spectroscopy (SEM–EDS), X-ray Diffraction (XRD), and micro-Vickers hardness testing. The results showed that variations in pulse current density influenced crystal growth and the distribution of reinforcement particles within the nickel matrix. A current density of 0.4 mA/mm2 produced fine nickel crystallites, the highest hardness value, and a homogeneous surface morphology with well-dispersed particles and minimal defects. At 0.3 mA/mm2, the resulting coating exhibited a rough surface and uneven particle distribution, while at 0.5 mA/mm2, excessive particle growth occurred, leading to decreased hardness. Therefore, a pulse current density of 0.4 mA/mm2 is considered the most effective condition for the electrodeposition process.

Item Type:	Thesis (Sarjana)
Additional Information:	1). Prof. 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:	Rangga Aditya Pratama .
Date Deposited:	14 Aug 2025 07:51
Last Modified:	14 Aug 2025 07:51
URI:	http://repository.unj.ac.id/id/eprint/60848

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