HRTEM observation of misfit dislocations at non-faceted Al–Pb interfaces

Abstract Al–Pb samples containing 1 at.% Pb were produced by high-energy ball milling and investigated by high-resolution transmission electron microscopy. The Pb inclusions embedded in an Al matrix exhibit a non-faceted, curved morphology. Dislocations have been found to accommodate the misfit of about 22% at the Al–Pb interfaces. Burgers circuits, drawn around these misfit dislocations, exhibit closing failures of the type a0 /4〈211〉. Acknowledgements The authors gratefully acknowledge support by the Deutsche Forschungsgemeinschaft (SPP1120). One of the authors (GW) gratefully acknowledges partial support by the HGF via the Initiative and Networking Fund. Torsten Scherer is thanked for the TEM sample preparation.