Structural factor of the as-cast MG. The appearance of shoulder on the second peak indicates the existence of ISRO in the as-cast sample.
DSC curve of the as-cast MG at a heating rate of 20 K/min. The red point denotes the annealing temperature 615 K.
TEM bright-field image of the sample annealed at 615 K for 15 min. The green and red circles mark two kinds of precipitates, respectively.
HRTEM image of an phase (the large particles marked by green circles in Fig. 3) precipitated from the sample annealed at 615 K for 15 min. The inset shows the IFT image of the selected area (enclosed by the red square). The measurement of its interplanar spacing identifies the nanoparticle as the structure.
(a) HRTEM image of an I-phase (the small particles marked by red circles in Fig. 3) precipitated from the sample annealed at 615 K for 15 min. (b) FT pattern of the selected area in (a), showing the fivefold symmetry. (c) IFT image of the selected area (enclosed by the red square) in (a), the white line plot is the result of linking the bright points and shows the fivefold symmetries of arrangement of the atomic units in the high symmetrical I-phase. (d) FT pattern of the I-phase, showing twofold zone axes.
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