Transmission electron microscopy study of dislocations and extended defects in as-grown icosahedral Al-Pd-Mn single grains

Analyses of transmission electron microscopy observations of dislocations a nd faults oriented in mirror planes of as-grown single grains of icosahedra l Al-Pd-Mn show that the Burgers vectors and associated fault vectors are p erpendicular to the fault planes. These results suggest that climb processe s have to be considered as realistic deformation modes at high temperatures in these materials.