Ribbons containing 1at%Pb were produced by melt-spinning and subsequently investigated by high-resolution transmission electron microscopy. It was shown that the lattice mismatch of about 22% between the nm-sized Pb inclusions and the surrounding Al matrix was accommodated by a periodic array of misfit dislocations at the Al–Pb interface. The closing failures of Burgers circuits drawn around misfit dislocations on {111} and {100} facets identify the corresponding Burgers vectors as (a0/4) and (a0/2) , respectively. The Burgers vector of (a0/4) corresponds to the projected edge part of a 60° (a0/2) dislocation. The Pb inclusions themselves appear to be free of defects.

HRTEM Observation of Interfacial Dislocations at Faceted Al–Pb Interfaces. H.Rösner, J.Weissmüller, G.Wilde: Philosophical Magazine Letters, 2004, 84[11], 673-83