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In this study, electron-irradiation-induced phase transformations between alumina polymorphs were investigated by high-resolution transmission electron microscopy. It was found that the electron-irradiation-induced α→κ′ phase transformation occurred in the alumina under 100keV electron irradiation. It is likely that the knock-on collision between incident electrons and Al 3+ cations is responsible...
The effect of platinum on the electron-irradiation-induced decomposition of sapphire was investigated by in situ transmission electron microscopy. Comparison between the decomposition rates of pure sapphire and Pt-deposited sapphire revealed that the deposition of Pt considerably decreased the decomposition rate of sapphire under electron irradiation. These finds suggest Pt suppresses the interatomic...
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