Formation of metastable phases in Zr-ion-irradiated Al2O3 upon thermal annealing
書誌事項
- 公開日
- 2017-07-28
- 資源種別
- journal article
- DOI
-
- 10.1093/jmicro/dfx028
- 公開者
- Oxford University Press (OUP)
この論文をさがす
説明
Formation of metastable phases in Zr-ion-irradiated corundum alumina (Al2O3) upon thermal annealing was examined using transmission electron microscopy. A metastable cubic spinel phase was formed in the topmost layer of the as-irradiated microstructure. During thermal annealing at temperatures ranging from 1073 to 1273 K, this spinel layer grew in extent via an unusual corundum-to-spinel phase transformation. A normal spinel-to-corundum phase transformation was observed at post-irradiation annealing temperatures greater than 1473 K. In addition, ZrO2 nanocrystals embedded in α-Al2O3 were observed to form at these higher temperatures. High-resolution transmission electron microscopy observations and electron diffraction experiments revealed that the structure of the ZrO2 precipitates observed in this study are consistent with a high-pressure metastable orthorhombic phase of ZrO2 known as the Ortho-I phase.
収録刊行物
-
- Journal of Electron Microscopy
-
Journal of Electron Microscopy 66 (6), 388-396, 2017-07-28
Oxford University Press (OUP)
