Phys. Rev. Lett. 89, 085502 (2002) [4 pages]Chevron Defect at the Intersection of Grain Boundaries with Free Surfaces in AuReceived 17 May 2002; published 1 August 2002 We have identified a new defect at the intersection between grain boundaries and surfaces in Au using atomic resolution transmission electron microscopy. At the junction line of 90° ⟨110⟩ tilt grain boundaries of (110)-(001) orientation with the free surface, a small segment of the grain boundary, about 1 nm in length, dissociates into a triangular region with a chevronlike stacking disorder and a distorted hcp structure. The structure and stability of these defects are confirmed by atomistic simulations, and we point out the relationship with the one-dimensional incommensurate structure of the grain boundary. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.085502
DOI:
10.1103/PhysRevLett.89.085502
PACS:
61.72.Dd, 61.50.Ks, 61.72.Mm, 81.30.Hd
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