Abstract.As revealed by Mössbauer spectroscopy, replacement of 10 at.% of iron in the amorphous Fe 70 Mo 5 Cr 4 Nb 6 B 15 alloy by cobalt or nickel has no effect on the magnetic structure in the vicinity of room temperature, although the Curie point moves from 190 K towards ambient one. In the early stages of crystallization, the paramagnetic crystalline Cr 12 Fe 36 Mo 10 phase appears before -Fe or -FeCo are formed, as is confi rmed by X-ray diffractometry and transmission electron microscopy. Creation of the crystalline Cr 12 Fe 36 Mo 10 phase is accompanied by the amorphous ferromagnetic phase formation at the expense of amorphous paramagnetic one.
The paper presents the results of studying the dynamics of the crystallization process for the samples subjected to three separate processes of isothermal heating with three different energy in the process. For this purpose, a series of samples prepared in the form of a ribbon of an amorphous structure, as confirmed from X-ray diffraction were then subjected to a controlled annealing. The research of samples after heat treatment revealed the presence of different crystalline phases that are characterized by different nucleation energies.
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