A grain boundary phase transition in Si–Au

A grain boundary transition from a bilayer to an intrinsic (nominally clean) boundary is observed in Si–Au. An atomically abrupt transition between the two complexions (grain boundary stabilized phases) implies the occurrence of a first-order interfacial phase transition associated with a discontinu...

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Bibliographic Details
Published in:Scripta materialia 2012-03, Vol.66 (5), p.203-206
Main Authors: Ma, Shuailei, Meshinchi Asl, Kaveh, Tansarawiput, Chookiat, Cantwell, Patrick R., Qi, Minghao, Harmer, Martin P., Luo, Jian
Format: Article
Language:English
Subjects:
Aberration-corrected STEM
Boundaries
Cleaning
Complexion
Discontinuity
Grain boundaries
Grain boundary
Interfaces
Monolayers
Origins
Phase transformations
Phase transition
Stabilization
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Summary:A grain boundary transition from a bilayer to an intrinsic (nominally clean) boundary is observed in Si–Au. An atomically abrupt transition between the two complexions (grain boundary stabilized phases) implies the occurrence of a first-order interfacial phase transition associated with a discontinuity in the interfacial excess. This observation supports a grain-boundary complexion theory with broad applications. This transition is atypical in that the monolayer complexion is absent. A model is proposed to explain the bilayer stabilization and the origin of this complexion transition.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2011.10.011