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三次元再構成パラメータの定量化

論文紹介:再構成再構成パラメータの定量化

Assessing Experimental Parameter Space for Achieving Quantitative Electron Tomography for Nanometer-Scale Plastic Deformation

著者(太字は当社メンバー)

YA-PENG YU1, HIROMITSU FURUKAWA2, NORITAKA HORII2, and MITSUHIRO MURAYAMA3

1Institute for Critical Technology and Applied Science, Virginia Tech, 2System in Frontier Inc., 3Materials Science and Engineering, Virginia Tech

掲載誌
Metallurgical and Materials Transactions A, Volume 51, Number 1, January 2020, Pages 20‒27,
https://doi.org/10.1007/s11661-019-05345-3
Abstract
Integrating in situ deformation and electron tomography (ET) techniques allows us to visualize the materials’ response to an applied stress with nanometer spatial resolution. The capability of structural, chemical, and morphological characterization in three-dimension real time and at sub-microscopic levels alleviates several persistent problems of two-dimensional imaging such as the projection effect and postmortem appearance. On the other hand, implementing deformation mechanism introduces additional experimental constraints that could influence the accuracy of the reconstructed volumes in a different way. To materialize quantitative and statistically relevant microstructure interpretation by time-resolved ET, we evaluated several key parameters such as angular tilt range, tilt increment, and reconstruction algorithms to characterize their influences on the accuracy of size and morphology reproducibility.
解説
この論文では、電子線トモグラフィー法を先端材料の研究に導入するに先立って、観察対象の大きさや電子線の透過率、観察(投影)範囲と投影総数、そして再構成アルゴリズムが再構成結果に与える影響を定量化することを試みています。形状,材質,寸法が既知の試料を使うことで、極めて理論値に近い実践的なデータを得ることに成功しています。
他にも先端材料の電子線トモグラフィー観察に関しては以下の論文も発表されています。
タイトル
Electron tomography imaging methods with diffraction contrast for materials research
著者:(太字は当社メンバー)

X.Y.Wang, R. Lockwood, M. Malac, H. Furukawa, P. Li, A. Meldrum

掲載誌

ltramicroscopy, Volume 113, February 2012, Pages 96-105
https://doi.org/10.1016/j.ultramic.2011.11.001

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