Phase diagram of yttria-stabilized zirconia. - ResearchGate
One failure mechanism of thermal barrier coatings composed of yttria-stabilized zirconia (YSZ) has been proposed to be caused, in part, by the transformation of the tetragonal phase of YSZ into...
Yttria-stabilized zirconia - Wikipedia
Yttria-stabilized zirconia (YSZ) is a ceramic in which the cubic crystal structure of zirconium dioxide is made stable at room temperature by an addition of yttrium oxide. These oxides are commonly called "zirconia" (Zr O 2) and "yttria" (Y 2 O 3), hence the name.
Perspective Chapter: The Application of Yttria-Stabilized
Apr 3, 2023 · The phase diagram, which is illustrated in Figure 2, clearly indicated the phase (or phases) of YSZ will be produced as the mole percentages (mol%) of yttria against the sintering temperature. For example, tetragonal ( t ) and cubic ( c ) will be produced with 5 mol% of yttria (5Y) and sintered at temperature 1000°C.
Investigation on the phase stability of yttria-stabilized zirconia ...
May 1, 2019 · The phase of YSZ strongly depends on the Y 3+ content because of the ionic radius mismatch between Y 3+ and Zr 4+, which affects the metastable tetragonal and cubic phases. The phase transition is apparent from 3 to 8 mol% YSZ as the peak changes from a doublet to single peak.
From zirconia to yttria: Sampling the YSZ phase diagram using …
Feb 22, 2016 · The sample with 3 mol% Y 2 O 3 would be tetragonal at elevated temperatures, 8YSZ would exhibit the cubic polymorph, and 20YSZ either the cubic one too, or a mixture between the cubic and the δ phase. In 1984, Ruh et al. 34 again focused on the high-ZrO 2 region of the YSZ phase diagram.
The phase diagram for yttria and zirconia where typical 8YSZ ...
Download scientific diagram | The phase diagram for yttria and zirconia where typical 8YSZ composition is shown in the tetragonal + cubic solid solution phase region (Ref 34) from...
Investigation on the phase stability of yttria-stabilized zirconia ...
May 1, 2019 · In this study, we observed the degradation mechanisms of YSZ by phase transformation under short-time degradation conditions using phase analysis methods and determined the suitability of YSZ as an electrolyte of SOFC and SOM electrolysis cell through various hypotheses.
Phase diagram for a nano-yttria-stabilized zirconia system
In this study, a phase diagram for the n-YSZ system was provided to determine phase stability ranges at room temperature with respect to particle size and composition. The calculation of phase diagrams (CALPHAD) approach was applied to calculate the Gibbs energy of bulk YSZ.
(a) Comparison of phases among 3, 5, 6 and 8YSZ after
We report a phase-controlled, bendable, ultra-thin 3YSZ electrolyte with a thickness of ~22 μm, high flexural strength, and improved ohmic resistance that surpasses that of 8 mol% YSZ...
Fig. S1 SEM images of 8YSZ and 9.5YSZ. Fig. S2 The configuration of electrodes in the (a) across-plane and (b) van-der Pauw method. Fig. S3 (a) Variations in ohmic resistance before and after the 900 °C degradation test with 1.7V and (b, c) changes in impedance spectroscopy over time at 750 °C with 1.7V. Temperature.