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Theory of the phases and atomistic structure of yttria-doped zirconia

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UNSPECIFIED (2002) Theory of the phases and atomistic structure of yttria-doped zirconia. PHYSICAL REVIEW B, 66 (13). -. doi:10.1103/PhysRevB.66.132105 ISSN 1098-0121.

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Official URL: http://dx.doi.org/10.1103/PhysRevB.66.132105

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Abstract

Atomistic configurations of yttria-stabilized zirconia between 3 and 10 mol % Y2O3 were relaxed using the pseudopotential technique. The results showed a phase transition to the cubic (c) (ZrO2)(100-x)(Y2O3)(x) at xsimilar to10 mol %. The electron-energy-loss near-edge spectra, calculated using the linear muffin-tin orbital method and relaxed defect geometry, agree with experiment. In the displacive limit of the double-well potential model, the vibration modes, corresponding to a soft phonon of c-ZrO2, were calculated for each composition of yttria-stabilized zirconia. The effect of anharmonicity yields the fine structure in the spectral density which is associated with stabilization at x<10 mol %. In studying the phonon dynamics, we use the displacement probability density which quantifies accurately the transition temperature above which the c phase is stabilized.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: PHYSICAL REVIEW B
Publisher: AMERICAN PHYSICAL SOC
ISSN: 1098-0121
Official Date: 1 October 2002
Dates:
DateEvent
1 October 2002UNSPECIFIED
Volume: 66
Number: 13
Number of Pages: 4
Page Range: -
DOI: 10.1103/PhysRevB.66.132105
Publication Status: Published

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