Abstract
Low-symmetry metastable phases with planar defects of the metallic glass Pd80Si20 are observed at the initial stage of crystallization. Since the reciprocal points are stretched into rods in the direction perpendicular to the planar defects, when the reciprocal rods intersect the Ewald sphere, electron diffraction patterns with cross-grating bands will be obtained. Geometrically, the indexes of these diffraction spots can be directly obtained from these diffraction patterns. The structure parameters of these low-symmetry phases are analyzed with the aid of high-order Laue zones and Laue spots. The appearance of these metastable phases reveals that the crystallization of the metallic glass Pd80Si20 is a complicated and composition dependent process, and the lattice parameters of these metastable phases are affected by the local composition.
Published Version
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