Effect of Titania (TiO2) Addition to Zirconia Toughened Alumina (ZTA) Phases, Hardness and Microstructure
Ceramic composites consist of zirconia toughened alumina (ZTA) with TiO2 as additive was fabricated via solid state sintering route. Numerous studies have indicated that TiO2 can be used as sintering additives for Al2O3 and the ability of microstructural control introduce by TIO2. The Vickers har...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Trans Tech Publications, Switzerland
2015
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/45859/ http://irep.iium.edu.my/45859/1/45859_-_Effect_of_titania_%28TiO2%29addition_to_zirconia_toughened_Alumina_%28ZTA%29_phases%2Chardness_and_microstructure.pdf |
| Summary: | Ceramic composites consist of zirconia toughened alumina (ZTA) with TiO2 as additive
was fabricated via solid state sintering route. Numerous studies have indicated that TiO2 can be
used as sintering additives for Al2O3 and the ability of microstructural control introduce by TIO2.
The Vickers hardness of the obtained ZTA-TiO2 was evaluated as a function of different TiO2
addition. Each sample was dry mixed, uniaxially pressed and sintered at 1600 oC for 4 hours in
pressureless condition. It is noticed that the presence of TiO2 greatly influenced the microstructure
of Al2O3. Al2O3 grains tend to increase in size with the addition of more than 3 wt% TiO2.
Characteristics of Vickers hardness increased from 1516.13 HV (0 wt% TiO2) to 1615.8 HV (3 wt%
TiO2) due to the increased in bulk density from 3.90 g/cm3 (0 wt% TiO2) to 4.10 g/cm3 (3 wt%
TiO2). |
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