STEM HAADF (Scanning Transmission Electron Microscopic High-angle Annular Dark-field) Images 2 (IMAGE)

Lehigh University

STEM HAADF (Scanning Transmission Electron Microscopic High-angle Annular Dark-field) Images 2

Caption

The discovery announced in Science by Harmer's group sheds light on the atomic structures that form when atoms segregate at general grain boundaries, which are important in controlling many properties of polycrystalline alloys. The researchers created atomistic models and atomic-resolution STEM HAADF (scanning transmission electron microscopic high-angle annular dark-field) images of three segregation-induced superstructures observed at randomly-selected general grain boundaries of a nickel-bismuth (Ni-Bi) polycrystalline alloy.

Credit

Images by Zhiyang Yu, Patrick R. Cantwell and Jian Luo

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