Pengaruh Lapisan Tipis SiO2 Dan Spinel MgAl2O4 Pada Permukaan Serbuk SiC Terhadap Kekuatan Antarmuka Komposit Al/SiC Dengan Metode Metalurgi Serbuk

Rosyadi, Yusuf Imam (2021) Pengaruh Lapisan Tipis SiO2 Dan Spinel MgAl2O4 Pada Permukaan Serbuk SiC Terhadap Kekuatan Antarmuka Komposit Al/SiC Dengan Metode Metalurgi Serbuk. Undergraduate thesis, Institut Tekonologi Sepuluh Nopember.

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Abstract

Telah dilakukan penelitian tentang pengaruh lapisan tipis SiO2 dan spinel MgAl2O4 terhadap kekuatan ikatan antarmuka komposit Al/SiC dengan metode metalurgi serbuk. Penelitian ini bertujuan untuk mengetahui pembentukan lapisan SiO2 dan spinel MgAl2O4 pada permukaan SiC, interdifusi atom yang terjadi pada daerah antarmuka komposit Al/SiC, dan pengaruh lapisan SiO2 dan spinel MgAl2O4 terhadap kekerasan komposit Al/SiC. Komposit Al/SiC dibuat menggunakan Aluminium sebagai matrik dan serbuk SiC sebagai penguatnya. Pada permukaan serbuk SiC dilakukan pelapisan SiO2 dan spinel MgAl2O4 untuk meningkatkan kekuatan ikatan antarmuka komposit Al/SiC. Disamping itu, digunakan variasi fraksi volume penguat SiC 5, 10, dan 15%. Pembentukan Komposit Al/SiC dilakukan menggunakan metode metalurgi serbuk. Metode ini diawali dengan mencampurkan Aluminium dan SiC. Hasil campuran kemudian dilakukan proses kompaksi secara single compaction dengan tekanan 36 MPa. Selanjutnya dilakukan sintering pada suhu 550oC dan waktu tahan 2 jam di dalam vacuum furnace. Hasil penelitian menunjukkan bahwa pada daerah antarmuka komposit terjadi fenomena interdifusi yang diindikasikan dengan adanya garis perpotongan antara atom-atom penyusun matrik dan penguat. Disamping itu, peningkatan fraksi volume penguat SiC dan pelapisan SiO2 maupun spinel MgAl2O4 teramati mampu meningkatkan kekerasan komposit Al/SiC. Komposit Al/15%SiC/SiO2 memiliki nilai microhardness tertinggi, yaitu 109,6 HV.
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Research has been carried out about the effect of thin layers of SiO2 and MgAl2O4 spinel on the surface of SiC powder to the interface strength of Al/SiC composite by powder metallurgy method. This study aims to determine the formation of SiO2 and spinel MgAl2O4 layers on the surface of SiC powders, the atomic interdiffusion that occurs at the interface of Al/SiC composites , and effect of SiO2 dan spinel MgAl2O4 layers on the hardness of Al/SiC composites. Al/SiC composites are made using Aluminum as the matrix and SiC powder as reinforcement. On the surface of SiC powder, SiO2 and Spinel MgAl2O4 were coated to increase the bond strength of the composite interface. Besides that, 5%, 10%, and 15% SiC reinforcement volume fraction variations were used. The Al/SiC composites was made using powder metallurgy method. This method begins with mixing aluminium and SiC powder. The resulting mixture is then compaction by single compaction with a pressure of 36 MPa. Then carried out sintering at a temperature of 550oC and a holding time of 2 hours in a vacuum furnace. The results showed that in the composite interface a diffusion atomic occurred which was indicated by the presence of a line of intersection between the atoms matrix and reinforcement. Besides that, increasing the volume fraction of SiC reinforcement and SiO2 and Spinel MgAl2O4 coatings were able to increase the hardness of Al/SiC composites. The Al/15%SiC/SiO2 composite has the highest microhardness value, which is 109.6 HV.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Interdiffusion, Interface Bonding, Al/SiC Composites, Interdifusi, Ikatan Antarmuka, Komposit Al/SiC
Subjects: Q Science > QC Physics > QC173.4.C63 Composite materials
Divisions: Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User: Yusuf Imam Rosyadi
Date Deposited: 07 Sep 2021 03:21
Last Modified: 07 Sep 2021 03:21
URI: http://repository.its.ac.id/id/eprint/90380

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