Abstract
The crystallization of Fe 73Si 3B 24 amorphous alloys has been studied by transmission electron microscopy (TEM). A metastable phase P has been found and determined by a double tilting method in TEM. This phase belongs to a primitive tetragonal lattice with a = 0.62 nm and c = 1.43 nm. Its probable space group is P4nc or P4/mnc. In the Fe 2B phase, we found threefold twins which are rotated 120° around the [ 1 1 0] axis. The crystallization process of this alloy is suggested to be Amorphous→Amorphous + α-Fe(Si) + Fe 3B + P → α-Fe(Si) + Fe 3B + Fe 2B → α-Fe(Si) + Fe 2B.
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