Pengaruh Temperatur Dan Waktu Sintering Si3N4-Al2O3/Y2O3 Sebagai Skin Barrier Terhadap Sifat Termal Dan Daya Lekat Pada Substrat GFRP

Arwi, Yori (2025) Pengaruh Temperatur Dan Waktu Sintering Si3N4-Al2O3/Y2O3 Sebagai Skin Barrier Terhadap Sifat Termal Dan Daya Lekat Pada Substrat GFRP. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Thermal Barrier Coating (TBC) digunakan untuk melindungi komponen kedirgantaraan dari kondisi termal ekstrem, seperti kerucut hidung roket (nosecone) yang suhunya dapat melebihi 700°C. Substrat logam sering digunakan, namun bobot yang berat dan kerentanan terhadap korosi membatasi kinerjanya. Material komposit seperti Glass Fiber Reinforced Polymer (GFRP) menjadi alternatif unggul karena bobotnya ringan dan tahan korosi. Penelitian ini mengembangkan TBC berbasis keramik yang terdiri dari silicon nitride (Si₃N₄), yttrium oxide (Y₂O₃), dan alumina (Al₂O₃) pada substrat GFRP. Metode slurry coating dengan natrium silikat sebagai pengikat digunakan dalam proses pelapisan. Sintering dilakukan pada suhu 100°C, 125°C, dan 150°C selama 5, 6, dan 7 jam. Karakterisasi meliputi analisis SEM-EDX, XRD, FTIR, dan TGA. Pada suhu sintering 125°C selama 5 jam, terbentuk tiga fase utama yang stabil: yttrium oxide (Y₂O₃), aluminium oxide-h (Al₂O₃-h), dan senyawa silika (Si₈O₁₆). Analisis FTIR menunjukkan keberadaan ikatan Si-O-Si, Al-O, dan Y-O yang mendukung stabilitas lapisan. Performanya optimal dengan kekuatan adhesi 1,740 MPa, porositas 10,350%, suhu substrat tetap di bawah 151,667°C saat terpapar panas 700°C, dan kehilangan massa 11,742%. Penelitian ini menunjukkan bahwa parameter sintering memengaruhi kekuatan adhesi dan performa insulasi termal TBC berbasis keramik pada substrat GFRP, memberikan potensi signifikan untuk aplikasi kedirgantaraan dalam kondisi ekstrem.
Kata Kunci : Thermal barrier coating,Glass Fiber Reinforcement Polymer, komposit
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Thermal Barrier Coating (TBC) is used to protect aerospace components from extreme thermal conditions, such as rocket nose cones (nosecones) where temperatures can exceed 700°C. Metal substrates are often used, but their heavy weight and susceptibility to corrosion limit their performance. Composite materials such as Glass Fiber Reinforced Polymer (GFRP) are a superior alternative due to their light weight and corrosion resistance. This research developed a ceramic-based TBC consisting of silicon nitride (Si₃N₄), yttrium oxide (Y₂O₃), and alumina (Al₂O₃) on a GFRP substrate. The slurry coating method with sodium silicate as a binder was used in the coating process. Sintering was carried out at 100°C, 125°C, and 150°C for 5, 6, and 7 hours. Characterization included SEM-EDX, XRD, FTIR, and TGA analysis. At a sintering temperature of 125°C for 5 hours, three main stable phases were formed: yttrium oxide (Y₂O₃), aluminum oxide-h (Al₂O₃-h), and silica compounds (Si₈O₁₆). FTIR analysis shows the presence of Si-O-Si, Al-O, and Y-O bonds that support the stability of the coating. The performance was optimized with an adhesion strength of 1.740 MPa, porosity of 10.350%, substrate temperature remaining below 151.667°C when exposed to 700°C heat, and mass loss of 11.742%. This study shows that sintering parameters affect the adhesion strength and thermal insulation performance of ceramic-based TBCs on GFRP substrates, providing significant potential for aerospace applications under extreme conditions.
Keyword : Thermal barrier coating, Glass Fiber Reinforcement Polymer, composite

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Thermal barrier coating, Glass Fiber Reinforcement Polymer, composite, Thermal barrier coating,Glass Fiber Reinforcement Polymer, komposit
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Yori Arwi
Date Deposited:	23 Jan 2025 07:59
Last Modified:	23 Jan 2025 07:59
URI:	http://repository.its.ac.id/id/eprint/116767

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