Grain Boundary Curvatures Measurements in Annealed Yttria-Stabilized Zirconia (3Y-TZP) and Their Relation to Mean Grain Size

2015 ◽  
Vol 98 (12) ◽  
pp. 3628-3630 ◽  
Author(s):  
Jun Wang ◽  
Hans Conrad
Keyword(s):  
Grain Size ◽  
Grain Boundary ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Mean Grain Size

scholarly journals Grain Boundary Resistivity of Yttria-Stabilized Zirconia at 1400°C

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
J. Wang ◽  
A. Du ◽  
Di Yang ◽  
R. Raj ◽  
H. Conrad
Keyword(s):  
Grain Size ◽  
Grain Boundary ◽  
Electric Field ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Brick Layer Model ◽  
Dc Electric Field ◽  
Lower Temperature ◽  
Boundary Width ◽  
Grain Boundary Resistivity

The grain size dependence of the bulk resistivity of 3 mol% yttria-stabilized zirconia at 1400°C was determined from the effect of a dc electric field Ea=18.1 V/cm on grain growth and the corresponding electric current during isothermal annealing tests. Employing the brick layer model, the present annealing test results were in accordance with extrapolations of the values obtained at lower temperature employing impedance spectroscopy and 4-point-probe dc. The combined values give that the magnitude of the grain boundary resistivity ρb=133 ohm-cm. The electric field across the grain boundary width was 28–43 times the applied field for the grain size and current ranges in the present annealing test.

The Grain Size Effect on the Yttria Stabilized Zirconia Grain Boundary Conductivity

2010 ◽  
Vol 10 (11) ◽  
pp. 7411-7415 ◽  
Author(s):  
Victor Ivanov ◽  
Sergey Shkerin ◽  
Alexey Rempel ◽  
Vladimir Khrustov ◽  
Alexander Lipilin ◽  
...  
Keyword(s):  
Grain Size ◽  
Grain Boundary ◽  
Size Effect ◽  
Yttria Stabilized Zirconia ◽  
Grain Size Effect ◽  
Stabilized Zirconia ◽  
Boundary Conductivity

Analytical TEM study of a yttria stabilized zirconia/glass composite

1988 ◽  
Vol 46 ◽  
pp. 572-573
Author(s):  
Yung-Jen Lin ◽  
Peter Angelini ◽  
Martha L. Mecartney
Keyword(s):  
Grain Size ◽  
Grain Boundary ◽  
Grain Growth ◽  
Room Temperature ◽  
Tetragonal Zirconia ◽  
Yttria Stabilized Zirconia ◽  
Boundary Phase ◽  
Stabilized Zirconia ◽  
High Toughness ◽  
M Phase

Yttria stabilized zirconia is a versatile ceramic material. It can be used for structural components or as a solid electrolyte. Its properties (such as high toughness) are strongly affected by the microstructure. In partially stabilized zirconia, the high toughness is mainly due to the toughening effect of a tetragonal (t) to monoclinic (m) phase transformation in the vicinity of a crack. Retention of tetragonal zirconia at room temperature is important for fabricating transformation toughened materials. To completely retain tetragonal zirconia at room temperature the grain size of the material must be less than a critical size. In yttria stabilized zirconia this critical grain size depends on the yttria concentration. Grain growth of yttria stabilized zirconia is also influenced by the amount of yttria in the grains. These previous studies, however, have focused on the behavior of materials with minimal glassy grain boundary phases. In contrast, in commercial polycrystalline zirconia often a significant amount of glassy grain boundary phase is present. This current research seeks to elucidate the effects of these grain boundary phases on the grain growth in yttria stabilized zirconia ceramics.

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