Structural variations in ε-type Al-Pd-(Mn, Fe) complex metallic alloy phases

Marc Heggen (1) , Michael Engel (2) , Sergiy Balanetskyy (1) , Hans-Rainer Trebin (2) , M. Feuerbacher (1)

1 Institut für Festkörperforschung
2 Institut für Theoretische und Angewandte Physik

Structural modifications in complex metallic Ε-Al-Pd-(Mn, Fe) samples are studied by means of transmission electron microscopy. The modifications were observed in the vicinity of metadislocations and at phase boundaries. They are determined by the density and inclination of phason planes. In the vicinity of metadislocations and at an Ε6-Ε28-phase boundary, new monoclinic Ε-type structures appear locally, which were not detected as bulk phases in Al-Pd-(Mn, Fe) before. The present work points out the close entanglement between defects, i.e. metadislocations and phason planes, and structural modifications in Ε-type complex metallic alloys. An extended classification of Ε-type phases including monoclinic phases is presented on the basis of two different tiling descriptions.

Mots clés: Physical Sciences

Marc Heggen, Michael Engel, Sergiy Balanetskyy, Hans-Rainer Trebin, M. Feuerbacher. Structural variations in ε-type Al-Pd-(Mn, Fe) complex metallic alloy phases. Philosophical Magazine, 2008, 88 (04), pp.507-521. ⟨10.1080/14786430801894528⟩. ⟨hal-00513858⟩