Mohamed Aboras, Andanastuti Muchtar, Lim Kok Fong, Che Husna Azhari and Norziha Yahaya
الملخص العربي
The use of zirconia as a dental restorative material has increased because of its excellent mechanical properties, optical properties, and compatibility. Several studies have shown that adding oxides such as Y2O3 and CeO2 can considerably improve the stability of the tetragonal phase. This study aimed to produce cerium–zirconia with homogenous grain structure, high density, and high hardness by colloidal process, slip casting, and cold isostatic pressing (CIP) at a suitable sintering temperature. Fifteen disc specimens of ceria–zirconia nanocomposites were prepared by mixing CeO2 nanopowder (70 nm) with commercially available yttrium-stabilized zirconia nanopowder (20 nm) through colloidal process. The samples were then consolidated through slip casting followed by CIP. The composite containing 5 wt% CeO2 was sintered at 1600 °C, which was the final sintering temperature. Results from field-emission scanning electron microscopy, hardness, and density analyses showed that this processing route could produce samples with high hardness (14.14 GPa) and homogenous grain structure with full densification at 98% of the theoretical density. Hence, these materials were suitable candidates for dental-restoration applications.
تاريخ النشر
18/02/2015
الناشر
Conference: International Conference on Applied Sciences & Industrial Technology (ICASIT2015)
محمد ميلاد ابوراس | Mohamed M. M. Aboras | 1234