Materials Structure and Defect Characterization Division

 

Brief Introduction

Initiated by Professor Keshin KUO in the 1950s, electron microscopy has been one of the traditional areas of study at IMR over the past five decades. Research highlights include the following: (i) the determination of long-periodicity structures by lattice imaging in SiC and intermetallic compounds, (ii) discovery of a series of metal oxides, (iii) proposal of a technique for light atom imaging, (iv) discovery of numerous new phases and their domain structures in tetrahedrally close-packed phases by high-resolution imaging, electron diffraction, and computational simulations, (v)  identification of metastable structures in non-equilibrium alloys and structures of nonstoichiometric metal oxides, catalysts, and new minerals, (vi) discovery of five-fold symmetry and subsequently icosahedral quasi-crystals, (vi) proposal of the motion behaviors of dislocation in Laves phase, and (vii) discovery of a “tumor” that results in the local dissolution of MnS in the first stage of the pitting corrosion of stainless steels.

Research Areas

· Atomic-scale Review of Classic Problems in Advanced and Conventional Structural Materials
· In situ Transmission Electron Microscopy
· Interface Structure of Nano-scale Functional Multi-layer Materials
· Quantitative Electron Microscopy and Imaging Processing
· Computational Materials Science

Research Highlights

(a) Aberration-corrected high-resolution image of dislocation in Laves-phase intermetallic compounds
(b) High-resolution image of the dislocation core

Initial pitting corrosion of stainless steel manganese sulfide local dissolved originated from the oxide nano eight hedron in it[Author: unclear]

 

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