Study of ferroelastic behavior and microstructure in polycrystalline
LaCoO3 using Transmission Electron Microscopy
Keyword(s):
LaCoO3 is a ferroelastic perovskite-type oxide. It has been shown to undergo creep at room temperature. LaCoO3 responds to stress by changing its domain structure, resulting in formation of spontaneous strain. The microstructure of a sample of polycrystalline LaCoO3 with history of stress was investigated using Transmission Electron Microscopy (TEM). It was compared to an unstrained sample to determine what changes are produced. TEM analysis has shown an increase in defect density as well as the appearance of atomic scale ordering. The causes of the observed ordering and their relation to ferroelastic behavior are explored.
1969 ◽
Vol 27
◽
pp. 44-45
1972 ◽
Vol 30
◽
pp. 672-673
1985 ◽
Vol 43
◽
pp. 172-173
1990 ◽
Vol 48
(4)
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pp. 574-575