Thermokinetic analysis of the multistep crystallization of a NANOPERM-type ribbon

Abstract The crystallization of the as-quenched Fe 76 Mo 8 Cu 1 B 15 ribbon proceeds in four independent transformation steps, which however mutually overlap both in the temperature and time scales. A complex thermokinetic method is presented, by which the individual transformations could be experimentally separated and characterized. The kinetics and mechanism of the individual transformations have been determined. Both linear-heating and isothermal differential scanning calorimetry was used. As-prepared as well as heat-treated samples were characterized by transmission electron microscopy, X-ray diffraction and Mossbauer spectroscopy.