CRYSTALLIZATION TEMPERATURES AND CURIE POINTS OF AMORPHOUS (FE0.79CO0.21)(75-1.4XB10+0.4X METALLIC GLASSES(X)SI15)

Thermomagnetic properties and the crystallization process of a series of (Fe0.79Co0.21)(75+x)Si15-1.4xB10+0.4 metallic glasses are studied for the compositions x = 0, 2, 4, 6, 8, 10. The samples are studied by magnetic gravimetry, differential thermal analysis (DTA), and X-ray d iffraction. The crystalline phases and their crystallization temperatu res are established for all the compositions. The Curie temperature of the amorphous phase is obtained by adjusting the experimental points of the thermomagnetic curve to a theoretical equation. This procedure seems to be more convenient than the usual way of obtaining the Curie temperatures by graphical extrapolation of the thermomagnetic curves.