Characterization of manganese doped Y-TZP for biomedical applications
The densification behaviour and mechanical properties of manganese oxide doped yttria tetragonal zirconia polycrystals (MnO2-doped Y-TZP) were studied. Green samples containing varying amounts of MnO2 (0.05 to 1 wt%) were prepared using the wet colloidal technique. A pressure less sintering techniqu...
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Universiti Malaysia Perlis
2023
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| Summary: | The densification behaviour and mechanical properties of manganese oxide doped yttria tetragonal zirconia polycrystals (MnO2-doped Y-TZP) were studied. Green samples containing varying amounts of MnO2 (0.05 to 1 wt%) were prepared using the wet colloidal technique. A pressure less sintering technique was used to sinter the specimens at temperatures varying between 1150�C to 1600�C. Sintered bodies were characterized to determine the bulk density, tetragonal content, Young�s Modulus, hardness and fracture toughness. The results showed that the sintered bulk density and Young�s Modulus was enhanced by the addition of up to 0.1 wt% MnO2. On the other hand, fracture toughness of the material was further improved and more prominent for dopant addition of up to 0.3 wt% but for the 0.5 wt% addition of MnO2, an initial decrease in trend was observed, which after a sintering temperature of 1350�C, a drastic increase in properties was observed. As for the hardness of the material, addition of all wt% of dopant exhibited an improvement up to a sintering temperature of 1400�C. In addition to that, hydrothermal ageing - induced phase transformation of Y-TZP sintered at 1300�C for samples containing 0.5 and 1.0 wt% of MnO2 was suppressed. � 2015, Universiti Malaysia Perlis. All rights reserved. |
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