Tetragonal phase stability maps of ceria-yttria co-doped zirconia: From powders to sintered ceramics

A small amount of iron oxide (Fe2O3) was added to the commercially available 3 mol% Y-TZP as a sintering aid over a temperature range of 1250°C to 1500°C. Sintered samples were then evaluated to determine the bulk density, Vickers hardness, and fracture toughness. In addition, hydrothermal ageing experiments to determine the tetragonal phase stability were performed on selected sintered samples in superheated steam at 180°C / 10 bar for up to 24 hours. Based on the work carried out, it was revealed that additions of Fe2O3 particularly 0.3 wt% was indeed beneficial in aiding densification, improving the matrix stiffness and hardness when compared to undoped Y-TZP sintered at temperatures below 1350°C. Addition of Fe2O3 was found to have negligible effects on the fracture toughness of all samples with the exception of the 0.5 and 1 wt% doped Y-YZP sintered above 1400°C. Hydrothermal ageing resistance of Y-TZP was found to be enhanced with the addition of Fe2O3 in the Y-TZP matrix.

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Phase stability of Y + Gd Co-Doped Zirconia

Zeitschrift für Metallkunde ◽

10.3139/146.030163 ◽

2003 ◽

Vol 94 (3) ◽

pp. 163-170 ◽

Cited By ~ 41

Author(s):

Noemí R. Rebollo ◽

Olga Fabrichnaya ◽

Carlos G. Levi

Keyword(s):

Phase Stability ◽

Co Doped

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Structural configuration and tetragonal phase stability in the equiatomic quaternary Heusler compound TiZnMnSi

RSC Advances ◽

10.1039/d0ra07652j ◽

2020 ◽

Vol 10 (65) ◽

pp. 39731-39738

Author(s):

Jiaying Ji ◽

Qijia Gu ◽

Rabah Khenata ◽

Fayang Guo ◽

Yanfeng Wang ◽

...

Keyword(s):

Phase Transformation ◽

Phase Stability ◽

Tetragonal Phase ◽

Strong Tendency ◽

Structural Configuration ◽

Heusler Compound ◽

Quaternary Heusler Compound

The equiatomic quaternary Heusler compound TiZnMnSi exhibits strong tendency to tetragonal phase transformation.

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Investigation on the phase stability and thermal conductivity of Sc2O3, Y2O3 co-doped ZrO2 coatings

Material Science and Environmental Engineering ◽

10.1201/b19346-26 ◽

2015 ◽

pp. 123-127

Author(s):

H Liu ◽

X Xiong ◽

Y Wang ◽

X Chen

Keyword(s):

Thermal Conductivity ◽

Phase Stability ◽

Co Doped

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Effect of Co-Doping Cation on Phase Stability of Zirconia Bioceramics in Hot Water

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.26-28.773 ◽

2007 ◽

Vol 26-28 ◽

pp. 773-776

Author(s):

S. Yuhara ◽

Yorinobu Takigawa ◽

Tokuteru Uesugi ◽

Kenji Higashi

Keyword(s):

Binding Energy ◽

Oxygen Vacancy ◽

Phase Stability ◽

Vacancy Concentration ◽

Hot Water ◽

Oxygen Vacancy Concentration ◽

Zirconia Ceramics ◽

Axis Ratio ◽

Co Doping ◽

Co Doped

Phase stability of cation co-doped zirconia ceramics is examined. As the result, in contrast to the result in small amount of single cation doped zirconia, phase stability of co-doped zirconia ceramics can not be simply explained from ionic radius and valency of dopant or from the change in axis ratio. We focus on oxygen vacancy concentration and binding energy between oxygen vacancy and doped cation. By estimating phase stability from these factors, it is found that concentration of oxygen vacancy and the binding energy between the dopant and the oxygen vacancy are important factors for understanding the phase stability of zirconia ceramics.

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