Islam, Ibrahim Fathahillah Hizbul (2023) Analisis Numerik Dan Eksperimen Pengaruh Ketebalan Dan Jumlah Lapisan YSZ/Al2O3 Terhadap Performa Thermal Barrier Coating Pada Hastelloy C276. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Tip nose cone merupakan bagian pertama roket yang mengalami gesekan terhadap atmosfer sehingga dihasilkan panas yang terus meningkat dari waktu ke waktu. Oleh karena itu, bahan tip nose cone harus memiliki ketahanan terhadap temperatur dan tekanan tinggi. Ketika roket mengorbit pada ketinggian 200-300 Km, kondisi lingkungan atmosfer juga berfluktuasi sehingga tip nose cone juga harus dapat beradaptasi dengan kondisi ini. Tip nose cone roket harus dilindungi dengan pelapisan Thermal Barrier Coating (TBC) untuk menahan panas tinggi menggunakan Yttria Stabilized Zirconia (YSZ). YSZ yang dimodifikasi dengan Al2O3 memiliki kinerja yang baik terhadap temperatur tinggi dengan mengurangi oksidasi pada Top Coat (TC). Pada thesis ini YSZ/Al2O3 dengan variasi ketebalan dan jumlah lapisan 1, 2, dan 3 dianalisis terhadap morfologi, ketahanan thermal dan kekuatan tarik. Berdasarkan hasil uji eksperimen Variasi ketebalan dan jumlah lapisan top coat YSZ-Al2O3 berpengaruh terhadap morfologi dari hasil uji SEM. Semakin tinggi tebal dan banyaknya lapisan semakin banyaknya porositas yang terlihat. Hal ini dapat menyebabkan penurunan kekuatan tarik dan ketahanan thermal. Variasi ketebalan dan jumlah lapisan top coat YSZ-Al2O3 memberikan pengaruh terhadap sifat adhesive strenght dan ketahanan termal dari hasil eksperimen menunjukan ketebalan 180 μm 1 layer menunjukan hasil terbaik dengan nilai 22.86 MPa dan perubahan berat terhadap thermal sebesar 0.397 gr, hal ini menunjukan kestabilan dari coating.Pengaruh variasi ketebalan banyaknya jumlah lapisan hasil analisis thermal stress, elastic strain, dan deformatin semakin meningkat hal ini menyebabkan kerusakan pada top coat. Hasil desain analisis numerik optimum pada ketebalan 180 μm 1 layer. Hal ini dikarenakan jumlah lapisan 1 layer menghasilkan nilai thermal stress 4.3315E+8 Pa, elastic strain 2.5801E-3 m, dan deformation 2.8684E-4 yang rendah diantara variasi lain.
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The nose cone tip is the first part of the rocket that experiences friction against the atmosphere so that it produces heat that continues to increase from time to time. Therefore, the nosecone tip material must have resistance to high temperatures and pressures. When the rocket orbits at an altitude of 200-300 Km, the atmospheric environmental conditions also fluctuate so that the tip of the nose cone must also be able to adapt to these conditions. The nose cone tip of the rocket must be protected with a Thermal Barrier Coating (TBC) coating to withstand high heat using Yttria Stabilized Zirconia (YSZ). YSZ modified with Al2O3 has good performance against high temperatures by reducing oxidation on Top Coat (TC). In this thesis, YSZ/Al2O3 with variations in thickness and the number of layers, 1, 2, and 3, were analyzed for morphology, thermal resistance, and tensile strength. Based on the experimental results, variations in thickness and the number of layers of top coat YSZ-Al2O3 influence the morphology as observed in SEM tests. Increasing thickness and the number of layers lead to a higher number of visible porosities. Consequently, this may result in reduced tensile strength and thermal resistance. The variation in thickness and the number of layers of top coat YSZAl2O3 also affects the adhesive strength and thermal resistance, with a thickness of 180 μm in 1 layer showing the best results, with a tensile strength value of 22.86 MPa and a weight change in relation to thermal of 0.397 gr, indicating the stability of the coating. The effects of the variation in thickness and the number of layers are further evident in the analysis of thermal stress, elastic strain, and deformation, which increase and may cause damage to the top coat. The optimum design from numerical analysis was achieved at a thickness of 180 μm in 1 layer. This is because a single layer resulted in low values of thermal stress (4.3315E+8 Pa), elastic strain (2.5801E-3 m), and deformation (2.8684E-4) compared to the other variations
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Hastelloy C276, Simulation Thermal Barrier Coating (TBC), YSZ/Al2O3 |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.9.C57 Coatings T Technology > TN Mining engineering. Metallurgy > TN490 Zircon mines and mining U Military Science > U Military Science (General) > UG Military Engineering |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 27101-(S2) Master Thesis |
| Depositing User: | Ibrahim Fathahillah Hizbul Islam |
| Date Deposited: | 28 Dec 2023 08:31 |
| Last Modified: | 28 Dec 2023 08:31 |
| URI: | http://repository.its.ac.id/id/eprint/105330 |
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