Oxygen vacancy ordering induced displacements of cations in yttria-stabilized zirconia | Zendy

Yanguo Wang | Zendy; Canying Cai | Zendy; Liang Li | Zendy; Li Yang | Zendy; Yichun Zhou | Zendy; Guangwen Zhou | Zendy

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Oxygen vacancy ordering induced displacements of cations in yttria-stabilized zirconia

Author(s) -

Yanguo Wang,

Canying Cai,

Liang Li,

Li Yang,

Yichun Zhou,

Guangwen Zhou

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4963202

Subject(s) - yttria stabilized zirconia , yttrium , materials science , cubic zirconia , vacancy defect , dopant , oxygen , crystallography , grain boundary , lattice (music) , transmission electron microscopy , condensed matter physics , chemistry , oxide , ceramic , nanotechnology , metallurgy , doping , microstructure , physics , optoelectronics , organic chemistry , acoustics

Using scanning transmission electron microscopy, we report direct observation of oxygen vacancy ordering induced atomic displacements of the cation sub-lattice in yttria-stabilized zirconia (YSZ). We find that the cation lattice adopts a zigzag configuration along the [100] direction with alternately narrow and wide lattice spacings equivalent of 0.85 and 1.15 times of the (200) inter-planar distance of the cubic YSZ. Using atomistic simulations, we show that the cation displacements are induced by the alternate presence of oxygen vacancies at the (1/4, 1/4, 1/4) and (1/4, 3/4, 1/4) sites of the unit cells in the [001] direction. The results demonstrate that significant enrichment of yttrium atoms can occur within individual YSZ grains in addition to the typical surface or grain boundary segregation of dopant atoms

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