Departemen Fisika, Fakultas Sains dan Analitika Data (FSAD), Institut Teknologi Sepuluh Nopember (ITS) akan menyelenggarakan kembali kegiatan Seminar Seninan pada minggu ke-9 perkuliahan Semester Genap T.A. 2022/2023 ini, tepatnya pada tanggal 3 April 2023.
Pada Seminar Seninan yang ke-6 ini, salah satu mahasiswa pada Program Studi Doktor Ilmu Fisika dan Laboratorium Material Maju, Cahyaning Fajar Kresna Murti, yang akan menjadi narasumber.
Topik yang akan diangkat dalam kesempatan kali ini adalah “STRUCTURAL, PHYSICAL AND MECHANICAL PROPERTIES OF ZIRCONIA-POLYMORPH/ALUMINA COMPOSITES”.
Kegiatan ini akan dilaksanakan secara luring pada pukul 13.30 s.d. 15.00 WIB, bertempat di Ruang Kelas J-103. Mahasiswa di lingkungan Departemen Fisika dihimbau untuk menghadari kegiatan ini dan mengisi lembar kehadiran secara daring dengan cara memindai QR Code yang tersedia di depan pintu masuk Ruang Kelas J-103.
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Abstract:
The effect of zirconia polymorphs on the structural, physical, and mechanical properties of zirconia composites reinforced with various contents alumina was studied. The zirconia polymorphs exhibited amorphous (aZ) and tetragonal (tZ) phases, which were obtained by processing natural zircon sand, and the alumina (A) was a commercial product.
The mixture of zirconia and alumina was mechanically activated and sintered at 1400 °C for 3 h. The elemental analysis and phase analysis of the purified zirconia powder was performed via X-ray fluorescence spectroscopy (XRF), and X-ray diffraction (XRD). Characterization of the composites included diameter shrinkage, density, and Vickers hardness.
The atomic diffusivity in the interfacial region between each element was also observed based on the EDX line analysis. The results show that the amorphous zirconia powder contained 81.1% Zr with Si and Ti being dominant impurities.
However, the identified phases were amorphous and tetragonal for zirconia raw powder respectively. Further analysis of the composite phase exhibited new phases such as zircon, monoclinic zirconia, and mullite. The aZ/A 90:10 sample had the largest shrinkage in pellet diameter, apparent density, and Vickers hardness, at 20.8%, 4.40 g/cm3, and 6.07 GPa, respectively.
Departemen Fisika, Fakultas Sains dan Analitika Data (FSAD), Institut Teknologi Sepuluh Nopember (ITS) akan menyelenggarakan kembali kegiatan Seminar Seninan