Three-dimensional observation of ordered and disordered precipitates using dark-field TEM tomography

S. Hata, K. Kimura, S. Matsumura, Y. Tomokiyo, T. Moritani, M. Doi

研究成果: 会議への寄与タイプ学会誌査読

抄録

For three-dimensional (3D) observation of microstructures in ordering alloys, such as orientation variants and anti-phase domain boundaries, electron tomography using dark-field transmission electron microscopy (DF TEM) may be a potential approach. However, DF TEM tomography has been thought to be impossible because of dynamical diffraction effects in crystals. In this study, we attempted DF TEM tomography of ordered and disordered precipitates in Ni-Mo and Ni-Al-Ti alloys. A tilt series of DF images of the precipitates were obtained by precisely setting diffraction conditions for a superlattice reflection. Owing to a long extinction distance of the superlattice reflection, dynamical diffraction effects, such as thickness fringes, have been effectively suppressed. Preliminary 3D reconstruction from the obtained tilt series clearly shows qualitative morphology and relative positions of the precipitates, which suggests the feasibility of the DF TEM tomography for ordering alloys.

本文言語英語
ページ449-454
ページ数6
出版ステータス出版済み - 2005
イベントInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 - Phoenix, AZ, 米国
継続期間: 5月 29 20056月 3 2005

その他

その他International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
国/地域米国
CityPhoenix, AZ
Period5/29/056/3/05

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)

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