Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1584105 | Materials Science and Engineering: A | 2007 | 8 Pages |
Abstract
Nanocrystalline α-Zr condensates deposited by ion beam sputtering on the NaCl (1 0 0) surfaces and then annealed at 100-750 °C in air. The phases present were identified by transmission electron microscopy to be nanometer-size α-Zr + ZrO, α-Zr + ZrO + c-ZrO2, c-ZrO2, c- + t-ZrO2, t-ZrO2, and t- + m-ZrO2 phase assemblages with increasing annealing temperature. The ZrO2 showed strong {1 0 0} preferred orientation due to parallel epitaxy with NaCl (1 0 0) when annealed between 150 and 500 °C in air. The c- and t-ZrO2 condensates also showed (1 1 1)-specific coalescence among themselves. The c- and/or t-ZrO2 formation can be accounted for by the small grain size, the presence of low-valence Zr cation and the lateral constraint of the neighboring grains.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Sung-Wei Yeh, Tien-Yu Hsieh, Hsing-Lu Huang, Dershin Gan, Pouyan Shen,