[0 1 0] dislocations in the complex metallic alloy ksi'-Al-Pd-Mn

We describe the observation and characterization of dislocations with (0 1 0) habit planes in the complex intermetallic alloy xi'-Al-Pd-Mn by means of transmission electron microscopy. Contrast-extinction experiments show that the Burgers vectors of the dislocations are parallel to the [0 1 0] direction, which reveals that they are prismatic edge dislocations. Their movement is shown to take place by pure climb. The [0 1 0] dislocations are split into two pairs of partials. We argue that the Burgers vector length of the full dislocations amounts to 16.56 Angstrom and that of the individual partials to 4.14 Angstrom. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved