TEM study on laser processed intermetallic phases: Al 16 Ti 6 (Fe or Ni) 7

The structures of two laser processed ternary intermetallic phases, Al 16 Ti 6 (Fe or Ni) 7 , have been studied by using electron diffraction and microscopy. A convergent beam electron diffraction (CBED) technique for structure determination is described based upon the principle of kinematic interpretation of large angle systematic reflections in CBED disks. The structure type of phases Al 16 Ti 6 (Fe or Ni) 7 is characterized as the Mn 23 Th 6 (cF116)-type, the same as those of relevant phases Cu 16 Mg 6 Si 7 and Al 50 Ti 25 Fe 25 etc., by using the CBED technique. Various errors involved in the analyses are also discussed.