Lf. Barquin et al., IN-SITU STUDY OF THE CRYSTALLIZATION PROCESS AND MAGNETISM IN SOME FENBSIBCU AMORPHOUS-ALLOYS, Physica. B, Condensed matter, 234, 1997, pp. 418-420
Neutron diffraction between RT and 1000 degrees C has been employed to
determine the crystalline phases appearing during the crystallization
of Fe77Nb4Cu1SixB18-x(x = 0,12) metallic glasses. In the sample witho
ut Si(x = 0), the predominant phase is BCC-Fe, while in the x = 12 sam
ple an FCC-FeSi with DO3-type structure is building up from the beginn
ing of the crystallization process. For temperatures above 910 degrees
C, the BCC-Fe phase transforms its structure to FCC-Fe in the x = 0 s
ample. However, the FCC-FeSi phase remains stable in the x = 12 alloy
in the studied temperature range. The thermal expansion of the lattice
parameters lies around 1% while the total intensity decreases around
10% for all the phases.