3D structures of alloys and nanoparticles observed by electron tomography

Kazuhisa Sato, Kenta Aoyagi, Toyohiko J. Konno

研究成果: Conference contribution

抄録

3D structures of bulk alloys and nanoparticles have been studied by means of electron tomography using scanning transmission electron microscopy (STEM). In the case of nanoparticles of Fe-Pd alloy, particle size, shape, and locations were reconstructed by weighted backprojection (WBP), as well as by simultaneous iterative reconstruction technique (SIRT). We have also estimated the particle size by simple extrapolation of tilt-series original data sets, which proved to be quite powerful. We demonstrate that WBP yields a better estimation of the particle size in the z direction than SIRT does, while the latter algorithm is superior to the former from the viewpoints of surface roughness and dot-like artifacts. In contrast, SIRT gives a better result than WBP for the reconstruction of plate-like precipitates in Mg-Dy-Nd alloys, in respect of the plate thickness perpendicular to the z direction. We also show our recent results on the 3D-tomographic observations of microstructures in Ti-V-Al, Ti-Nb, Cu-Ag, and Co-Ni-Cr-Mo alloys obtained by STEM tomography.

本文言語English
ホスト出版物のタイトルOptical Measurements, Modeling, and Metrology - Proceedings of the 2011 Annual Conference on Experimental and Applied Mechanics
ページ1-9
ページ数9
出版ステータスPublished - 2011 12月 1
イベント2011 SEM Annual Conference on Experimental and Applied Mechanics - Uncasville, CT, United States
継続期間: 2011 6月 132011 6月 16

出版物シリーズ

名前Conference Proceedings of the Society for Experimental Mechanics Series
5
ISSN(印刷版)2191-5644
ISSN(電子版)2191-5652

Other

Other2011 SEM Annual Conference on Experimental and Applied Mechanics
国/地域United States
CityUncasville, CT
Period11/6/1311/6/16

ASJC Scopus subject areas

  • 工学(全般)
  • 計算力学
  • 機械工学

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