Transmission Electron Microscopy of Annealed ZrO2+8 Mol% Sc2O3 |
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| Authors: | FARHAD K MOGHADAM TOM YAMASHITA ROBERT SINCLAIR DAVID A STEVENSON |
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| Affiliation: | Intel Corporation, Santa Clara, California 95051;Department of Materials Sciencc and Engineering, Stanford University, Stanford, California 94305 |
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| Abstract: | The influence of heat treatment (800°C for 200 h) on the micro-structure of 8 mol% Sc2O3-ZrO2 was investigated by XRD and TEM. The starting material was initially characterized and found to contain predominantly cubic-fluorite phase grains, with <5% of the grain containing the rhombohedral β phase. The β phase was positively identified by the analysis of electron diffraction pattern and by quantitative energy dispersive X-ray analysis. On aging, the relative amount of β phase was found to increase to about 15 to 20% by XRD measurement; this was confirmed by TEM observation. The orientation relation between the different variants of the β phase within a grain was determined to be (100)r||(010)r, and the geometrical arrangement of these variants within the grain was deduced using a 21/2D imaging electron microscopy technique. |
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