Title :
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
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 1350°C,1400°C,1450°C and 1500°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 1450°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;
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
DOI :
10.1109/INEC.2010.5424808
