Analisis Pengaruh Variasi Tegangan Dan Penambahan ZrO2 Terhadap Karakteristik Lapisan Oksida Pada Substrat Ti-6Al-4V Dengan Metode Plasma Elctrolytic Oxidation (PEO)

Al Firdaus, Hilal Ahfas (2026) Analisis Pengaruh Variasi Tegangan Dan Penambahan ZrO2 Terhadap Karakteristik Lapisan Oksida Pada Substrat Ti-6Al-4V Dengan Metode Plasma Elctrolytic Oxidation (PEO). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Paduan Ti-6Al-4V banyak digunakan sebagai material implan karena memiliki kekuatan mekanik dan ketahanan korosi yang baik, tetapi sifat permukaannya yang relatif bioinert dapat membatasi interaksi dengan jaringan tulang. Penelitian ini bertujuan menganalisis pengaruh variasi tegangan Plasma Electrolytic Oxidation (PEO) dan penambahan ZrO₂ terhadap morfologi, komposisi, ketebalan, kekuatan adhesi, dan viabilitas sel osteoblas pada lapisan oksida Ti-6Al-4V. Proses PEO dilakukan selama 15 menit pada tegangan 250V, 300V, dan 350V dengan penambahan ZrO₂ sebesar 2gr, 4gr, dan 6gr ke dalam 500 mL elektrolit berbasis kalsium dan fosfat. Karakterisasi dilakukan melalui analisis visual, X-ray diffraction (XRD), SEM-EDX top view, SEM cross section, pull-off adhesion test, dan MTT Assay. Hasil pengujian menunjukkan bahwa proses PEO berhasil membentuk lapisan oksida berpori yang mengandung unsur Ca, P, Zr, O, dan Ti, dengan indikasi fase α-Ti, kalsium fosfat, dan ZrO₂ berdasarkan pola XRD. Peningkatan tegangan cenderung meningkatkan porositas dan ketebalan lapisan, tetapi tegangan 350V menghasilkan permukaan yang lebih kasar dan kurang homogen. Sampel 4ZrO₂-300V menunjukkan karakteristik lapisan paling seimbang dengan porositas 21,88%, kandungan Zr tertinggi sebesar 2,34 wt%, dan ketebalan 1,497 ± 0,177 µm. Sampel tersebut juga menghasilkan kekuatan adhesi tertinggi sebesar 5,42 ± 1,29 MPa dengan cohesive failure 94,34% dan adhesive failure 5,66%. Hasil MTT Assay menunjukkan bahwa seluruh sampel memiliki viabilitas sel di atas 70% sehingga tidak menunjukkan potensi sitotoksik pada kondisi pengujian. Viabilitas tertinggi secara numerik diperoleh pada sampel 4ZrO₂-350V sebesar 77,985 ± 0,537%, sedangkan 4ZrO₂-300V menghasilkan 77,593 ± 0,347%. Berdasarkan korelasi seluruh hasil pengujian, kombinasi tegangan 300V dan penambahan 4gr ZrO₂ merupakan kondisi paling seimbang dalam menghasilkan lapisan PEO dengan morfologi relatif homogen, adhesi tertinggi, dan viabilitas sel yang baik.
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The Ti-6Al-4V alloy is widely used as an implant material because it possesses good mechanical strength and corrosion resistance; however, its relatively bioinert surface properties may limit interaction with bone tissue. This study aims to analyze the effects of varying Plasma Electrolytic Oxidation (PEO) voltages and the addition of ZrO₂ on the morphology, composition, thickness, adhesion strength, and osteoblast viability on the Ti-6Al-4V oxide layer. The PEO process was conducted for 15 minutes at voltages of 250V, 300V, and 350V, with 2gr, 4gr, and 6gr of ZrO₂ added to 500 mL of a calcium- and phosphate-based electrolyte. Characterization was performed through visual analysis, X-ray diffraction (XRD), SEM-EDX top view, SEM cross-section, pull-off adhesion test, and MTT assay. The test results showed that the PEO process successfully formed a porous oxide layer containing Ca, P, Zr, O, and Ti, with indications of α-Ti, calcium phosphate, and ZrO₂ phases based on the XRD patterns. An increase in voltage tended to increase the porosity and thickness of the layer, but a voltage of 350V produced a rougher and less homogeneous surface. The 4ZrO₂-300V sample exhibited the most balanced coating characteristics, with a porosity of 21.88%, the highest Zr content of 2.34 wt%, and a thickness of 1.497 ± 0.177 µm. This sample also exhibited the highest adhesion strength of 5.42 ± 1.29 MPa, with 94.34% cohesive failure and 5.66% adhesive failure. The MTT assay results showed that all samples had cell viability above 70%, indicating no cytotoxic potential under the test conditions. The highest numerical cell viability was obtained in the 4ZrO₂-350V sample at 77.985 ± 0.537%, while the 4ZrO₂-300V sample yield 77.593 ± 0.347%. Based on the correlation of all test results, the combination of 300V and the addition of 4gr of ZrO₂ represents the most balanced conditions for producing a PEO coating with relatively homogeneous morphology, the highest adhesion, and good cell viability.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Plasma Electrolytic Oxidation, Ti-6Al-4V, Coating, Zirconium oxide Plasma Electrolytic Oxidation, Ti-6Al-4V, Coating, Zirconium oxide
Subjects:	R Medicine > RD Surgery > RD755.5.C35 Orthopedic implants.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Hilal Ahfas Al-firdaus
Date Deposited:	24 Jul 2026 02:55
Last Modified:	24 Jul 2026 02:55
URI:	http://repository.its.ac.id/id/eprint/136792

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