Effect of microwave sintering on microstructure and mechanical properties in Y-TZP materials used for dental applications

The aim of this work is to study the application of microwave sintering to consolidate yttria-stabilized zirconia polycrystalline (Y-TZP) ceramics commonly applied in dentistry, so as to obtain highly dense materials and fine microstructure with shorter sintering cycles. Three Y-TZP materials are co...

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Bibliographic Details
Published in:Ceramics international 2015-06, Vol.41 (5), p.7125-7132
Main Authors: Presenda, Álvaro, Salvador, María D., Peñaranda-Foix, Felipe L., Moreno, Rodrigo, Borrell, Amparo
Format: Article
Language:English
Subjects:
C. Mechanical properties
Dental applications
Dental materials
Fracture toughness
Mechanical properties
Microstructure
Microwave sintering
Sintering (powder metallurgy)
Tetragonal zirconia polycrystals
Y-TZP materials
Yttria stabilized zirconia
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Summary:The aim of this work is to study the application of microwave sintering to consolidate yttria-stabilized zirconia polycrystalline (Y-TZP) ceramics commonly applied in dentistry, so as to obtain highly dense materials and fine microstructure with shorter sintering cycles. Three Y-TZP materials are considered: two commercially available for dental applications and one laboratory studied powder. Microwave sintering was carried out at 1200 and 1300°C for 10min and conventional sintering at 1300 and 1400°C for 2h. Relative density, Vickers hardness and fracture toughness values for sintered samples were determined. Microwave sintering results, generally, in improved mechanical properties of the materials in terms of hardness and fracture toughness compared to conventional sintering and, in some cases, at lower sintering temperatures. A finer grain microstructure (final grain size
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2015.02.025