Strain-Induced Asymmetric Line Segregation at Faceted Si Grain Boundaries

Physical Review Letters
Christian H LiebscherD Raabe

Abstract

The unique combination of atomic-scale composition measurements, employing atom probe tomography, atomic structure determination with picometer resolution by aberration-corrected scanning transmission electron microscopy, and atomistic simulations reveals site-specific linear segregation features at grain boundary facet junctions. More specific, an asymmetric line segregation along one particular type of facet junction core, instead of a homogeneous decoration of the facet planes, is observed. Molecular-statics calculations show that this segregation pattern is a consequence of the interplay between the asymmetric core structure and its corresponding local strain state. Our results contrast with the classical view of a homogeneous decoration of the facet planes and evidence a complex segregation patterning.

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Citations

Mar 19, 2020·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Benjamin M JenkinsBaptiste Gault
Sep 10, 2020·Microscopy Research and Technique·Michael Herbig, Ankit Kumar
Mar 29, 2020·Physical Review Letters·Huan ZhaoDierk Raabe
Jul 7, 2020·Physics and Chemistry of Minerals·Elena PetrishchevaRainer Abart
Apr 13, 2019·Physical Review Letters·Vladyslav Turlo, Timothy J Rupert
Oct 3, 2018·Nature Communications·Hongcai WangGunther Eggeler
Jan 19, 2022·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Patrick StenderAyman A El-Zoka

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