Mechanical and Microstructural Evaluation of Y-TZP Using Microwave Sintering Technique

The effects of adding Al2O3 and CeO2 on the microstructure, mechanical and physical properties of 3 mol% yttria-stabilized zirconia (3Y-TZP) ceramics is presented over a wide sintering regime by pressureless sintering. It has been revealed that small additions of dopant to Y-TZP were beneficial in e...

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Bibliographic Details
Published in:Key Engineering Materials 2016-08, Vol.706, p.36-41
Main Authors: Satgunam, Meenaloshini, Ragurajan, Dinesh, Golieskardi, Mohsen
Format: Article
Language:English
Subjects:
Aging
Aluminum
Bulk density
Ceramics
Cerium oxides
Crack initiation
Density
Dopants
Engineering
Grain size
High temperature
Mechanical properties
Microstructure
Modulus of elasticity
Physical properties
Sintering
Tetragonal zirconia polycrystals
Yttria stabilized zirconia
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Summary:The effects of adding Al2O3 and CeO2 on the microstructure, mechanical and physical properties of 3 mol% yttria-stabilized zirconia (3Y-TZP) ceramics is presented over a wide sintering regime by pressureless sintering. It has been revealed that small additions of dopant to Y-TZP were beneficial in enhancing the mechanical properties of Y-TZP. Sintered samples were used to evaluate the bulk density, Vickers’s hardness, Young’s modulus, and shrinkage of the material. Al2O3 and CeO2 doped Y-TZPs sintered at 1450∘ C retained high bulk density (>97% of theoretical density) and Young’s modulus (>200 GPa) without sacrificing tetragonal phase stability. The optimum level of dopant was found to be at 0.3 Al2O3 / 0.5 CeO2 at sintering temperature between 1250∘ C and 1450∘C using the standard 12 min holding time cycle, with sintered body exhibiting excellent combination of properties when compared to the undoped ceramics.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.706.36