High-temperature mechanical property in ceramics is directly related to the atomic structure and the chemical bonding strength in the grain boundaries. Transmission electron microscopy is a powerful tool to characterize the grain boundary structure. In this paper, the atomic structure and chemical bonding state at the grain boundaries in 0.05 mol%Lu2O3-doped Al2O3 polycrystalline, which shows an excellent high-temperature creep resistance, was investigated by high-resolution electron microscopy (HREM), energy dispersive X-ray spectroscopy (EDS), scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS). In addition, a first principle molecular orbital calculation (MO) was made to examine the unoccupied density of states and chemical bonding state at the grain boundary.
|ジャーナル||Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals|
|出版ステータス||Published - 2001|
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