On influence of low-temperature annealing on the atomic structure of Fe85 B15-based amorphous doped alloys

The atomic structure of (Fe99 M1)85 B15; M - Ni, Co, Si, Nd preeutectic alloys has been investigated both initial state and under low-temperature annealing with following prolonged exposure at room temperature. X-ray diffraction modelling experiments, calculations, and comparison with the crystal state were applied. Atomic structures of ribbons received by ultrafast coolong of a melt are different. Alloys substantial by differ in height of the first diffraction maximum: i (s1) = 4,46 / 3,52. Nonidentity of structure changes is observed under indicated actions. It is supposed that an amorphous state is the most stable one when there exists a topological similarity of a short-range atomic order of the amorphous matrix with an equilibrium crystal phase, and when such a similarity is lacking in micro groups of a metalloid type. The latter promotes amorphization