About Thermostability of Fe-Ni-P Amorphous Alloys

摘要

A research program has been completed in order to analyze structural changes during heating of amorphous alloys belonging to Fe-Ni-P system. Special attention has been given to thermodynamics and mechanism of crystallization, to determine some aspects of development for crystalline phases. Experimental material used to determine characteristics of crystallization consisted in long ribbons, 30μm thick and 18 mm wide, fabricated by mean of "Planar Flow casting" as amorphous Fe_(42)Ni_(38)P_(16)B_4 alloy. Differential Thermal Analysis (DTA) and X-rays diffraction have been used to determine crystallization temperature of this alloy. Curves of differential thermal analysis for heating rates ranging between 1°C/minute and 20°C/minute have been used to determine activation energy of crystallization.