Effect of sintering temperature on microscopic and mechanical properties of 3Y-TZP dental ceramic

Author

Zhang, Jingchao ; Liao, Yunmao ; Li, Wei ; Mo, Anchun

Author_Institution

State Key Lab. of Oral Diseases, Sichuan Univ., Chengdu, China

fYear

2010

Firstpage

1434

Lastpage

1435

Abstract

To investigate the microstructural evolution with sintering temperature and its effects on mechanical properties, 3mol% tetragonal zirconia polycrystals (3Y-TZP) with a primary grain size of 40 nm was sintered at 1350Â°C,1400Â°C,1450Â°C and 1500Â°C, respectively, in air for 1.5 h. Monophase t-ZrO₂ was revealed in all samples studied, indicating total stabilization of the m-ZrO2 present in starting powder and a critical grain size larger than 423 nm at room temperature. Full dense 3Y-TZP samples were obtained at 1450Â°C, which presented significantly higher strength and toughness than others (P<0.05). A mixed fracture mode with intergranular and transgranular fracture was observed in all samples and changed as a function of sintering temperature.

Keywords

bioceramics; composite materials; dentistry; fracture; grain size; mechanical strength; prosthetics; sintering; yttrium compounds; zirconium compounds; 3Y-TZP dental ceramic; ZrO₂-Y₂O₃; intergranular fracture; mechanical properties; mechanical strength; microscopic properties; microstructural evolution; mixed fracture mode; sintering temperature effect; size 40 nm; temperature 1350 degC; temperature 1400 degC; temperature 1450 degC; time 1.5 h; toughness; transgranular fracture; yttria stabilized tetragonal zirconia polycrystals; Ceramics; Dentistry; Grain size; Lattices; Mechanical factors; Nanoparticles; Powders; Scanning electron microscopy; Temperature distribution; X-ray scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanoelectronics Conference (INEC), 2010 3rd International

Conference_Location

Hong Kong

Print_ISBN

978-1-4244-3543-2

Electronic_ISBN

978-1-4244-3544-9

Type

conf

DOI

10.1109/INEC.2010.5424808

Filename

5424808