Determination of the structure of the tertiary phase in the alloy Al10Mo10Nb10Ta10Ti30Zr30 using convergent beam electron diffraction.

In this study, the determination of the structure of the tertiary phase which forms following heat treatment in an alloy based on Ti-Zr-Mo-Nb-Ta-Al is reported. Positive identification of the structure was accomplished using convergent beam electron diffraction (CBED) techniques to deduce the point and the space groups. Analyses of the zone axis symmetries showed that the point group of the phase was 6/mmm. Further analyses of dynamic absences resulted in the identification of the space group P6/mcc (no. 192). Structure models were created based on the experimental findings which were utilized to simulate the zone axis CBED patterns using the JEMS software package. The simulated patterns showed good agreement with the experimental findings.