STRUCTURAL RELAXATION OF AMORPHOUS ALLOYS Fe_(77.8)Si_(7.5)B_(14.7) AND Fe_(78.5)Si_(8.9)B_(12.6)

The structural relaxation of the amorphous alloys Fe_(77.8)Si_(7.5)B_(14.7) and Fe_(78.5)Si_(8.9)B_(12.6) was studied using Mossbauer technique together with DTA and resistivity. It is likely to have two stages, low and high temperature, of structural relaxation. The low temperature stage is mainly showed as relieving distorted stress and locally ordering atomic arrangement; and the high temperature stage as the long-range diffusion and segregation of metalloid atoms as well as nuclear growth.