Dislocation character and operative slip systems in α-Nb5Si3 tested at 1673K

Dislocation character and operative slip systems in α-Nb 5 Si 3 were examined by transmission electron microscopy. Two-phase alloys comprised of (Nb) and α-Nb 5 Si 3 were used in this study. Although few dislocations were present in the α-Nb 5 Si 3 phase of a pre-deformed alloy, many developed after 15% of compressive deformation at 1673 K. Two types of the Burgers vectors were identified for α-Nb 5 Si 3 : 5 Si 3 at 1673 K were determined as {011)