In vitro evaluation of low-temperature aging effects and finishing procedures on the flexural strength and structural stability of Y-TZP dental ceramics

2006 ◽  
Vol 96 (3) ◽  
pp. 154-164 ◽  
Author(s):  
Harry P. Papanagiotou ◽  
Steven M. Morgano ◽  
Russell A. Giordano ◽  
Richard Pober
Keyword(s):  
Low Temperature ◽  
Flexural Strength ◽  
Structural Stability ◽  
Dental Ceramics ◽  
Aging Effects ◽  
In Vitro Evaluation ◽  
Low Temperature Aging ◽  
Temperature Aging

Influence of Low Temperature Aging on the Flexural Strength of Y-TZP Ceramics

2012 ◽  
Vol 512-515 ◽  
pp. 1756-1760 ◽  
Author(s):  
Chen Wang ◽  
Li Min Dong ◽  
Yuan Fu Yi ◽  
Ning Wen ◽  
Qing Feng Zan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Phase Transformation ◽  
Low Temperature ◽  
Flexural Strength ◽  
Monoclinic Phase ◽  
Accelerated Aging ◽  
Strength Increase ◽  
Low Temperature Aging ◽  
Temperature Aging

Low temperature aging (LTD) is an important factor of Y-TZP ceramic as artificial joint femoral head and dental restorative materials in vivo for long-term application. In this paper, the accelerated aging experiments on Y-TZP ceramics were conducted. The t-m phase transition is occurring from the surface to the inside during low temperature aging of Y-TZP ceramics. As content of phase transformation increases, thickness of phase transformation layer increases. While the content of surface monoclinic phase is less, the volume expansion and surface stress caused by phase transformation can make cracks and holes shrink or even close, then the flexural strength increase. As a large number of surface monoclinic phase was generated, due to there are a lot of microscopic defects in the phase transition layer, crystals loose, strength of grain boundary lower than that of not aging area and phase transformation layers fracture in the intergranular mode, that damages the flexural strength. Therefore, the flexural strength increase firstly and then decrease with the increase of surface monoclinic content.

Properties of Yttria Stabilized Tetragonal Zirconia Polycrystals

1985 ◽  
Vol 60 ◽  
Author(s):  
Roger L. K. Matsumoto ◽  
B. J. McEntire
Keyword(s):  
Fracture Toughness ◽  
Low Temperature ◽  
Fracture Strength ◽  
Tetragonal Zirconia ◽  
Aging Effects ◽  
Polycrystalline Ceramic ◽  
Low Temperature Aging ◽  
Temperature Aging

AbstractThe properties of yttria stabilized tetragonal zirconia polycrystalline ceramic fabricated from commercial powders are described. The fracture strength, fracture toughness, density, and low temperature aging effects, are studied for sintered and hot isostatically pressed ceramics. The role of alumina as an additive to the material and its influence on properties is also discussed.

Low temperature aging effects on the formation of Sn nanoclusters in SiO2∕Si films and interfaces

2007 ◽  
Vol 91 (8) ◽  
pp. 083102 ◽  
Author(s):  
Felipe Kremer ◽  
João M. J. Lopes ◽  
Fernando C. Zawislak ◽  
Paulo F. P. Fichtner
Keyword(s):  
Low Temperature ◽  
Aging Effects ◽  
Low Temperature Aging ◽  
Si Films ◽  
Temperature Aging

CAD/CAM Zirconia for Dental Application

2013 ◽  
Vol 320 ◽  
pp. 505-511
Author(s):  
Ning Li ◽  
Zhi Kai Wu ◽  
Chao Jian ◽  
Wan Qian Zhao ◽  
Jia Zhen Yan
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Key Words ◽  
20Th Century ◽  
Dental Materials ◽  
Tetragonal Zirconia ◽  
Dental Application ◽  
Cad Cam ◽  
Low Temperature Aging ◽  
Temperature Aging

During the 20th century, both dental materials and dental technologies for the fabrication of dental prosthesis progressed remarkably. Owing to the increased demand of safety and aesthetics, 3 mol% yttria stabilized tetragonal zirconia polycrystalline has been recently introduced in prosthetic dentistry for the fabrication of crowns and fixed partial dentures, in combination with CAD/CAM technique. This greatly changed the conventional dental laboratory work which is labor-intensive and experience-dependent. This review mainly introduced the state of dental zirconia and the application of CAD/CAM technology in dentistry. Key words: Dental Zirconia; CAD/CAM Technique; Mechanical Properties; Transformation Toughing; Low Temperature Aging;

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