PREPARATION AND CHARACTERIZATION OF YTTRIA–CERIA DOPED TETRAGONAL ZIRCONIA / ALUMINA COMPOSITES | ||||
The International Conference on Applied Mechanics and Mechanical Engineering | ||||
Article 24, Volume 16, 16th International Conference on Applied Mechanics and Mechanical Engineering., May 2014, Page 1-14 PDF (3.52 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/amme.2014.35554 | ||||
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Authors | ||||
S. M. Naga1; H. F. El-Maghraby2; M. Awaad2; M. A. Saleh3; E. M. Abdelbary3; M. A. Tameem3 | ||||
1National Research Center, Ceramics Dept., Cairo, Egypt. Corresponding author: Salma M. Naga, National Research Center, Ceramic Dept., 12622-Cairo, Egypt.Tel.: 002 02 33322445 . | ||||
2National Research Center, Ceramics Dept., Cairo, Egypt. | ||||
3Egyptian Armed Forces. | ||||
Abstract | ||||
ABSTRACT Yttria-ceria doped tetragonal zirconia / alumina, (Y,Ce–TZP / Al2O3) composites were prepared via sol-gel and powder mixing techniques. The bodies were uniaxially pressed at 220 MPa. The formed green bodies were fired at 1500°C up to 1650°C with temperature interval of 50°C and firing rate of 5°C /min. The samples were evaluated for their densification, microstructure and phase constitution as well as their mechanical properties. ANSYS (finite element package) is utilized to simulate the temperature distribution along the material and so thermal conductivity of the material is calculated. The present study results showed an improvement in the properties of the samples prepared via sol-gel route compared with traditional powder mixing one. X-ray diffraction patterns of both sol-gel and mechanically mixed fired samples indicate the presence of cerium – zirconium oxide (Ce2Zr3O10) phase and the absence of cerium aluminate (CeAlO3) phase. It was concluded that the starting materials preparation route has a noticeable impact on the sintering behavior and mechanical properties of the final product. | ||||
Keywords | ||||
composites; sol-gel technique; Microstructure; Mechanical Properties; thermal conductivity | ||||
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