Abstract
The influence of additive elements Nb and Mo on the crystallization process of the amorphous alloy Fe76.5Cu1Si13.5B9 have been investigated by means of a Differential Scanning Calorimeter (DSC), X-ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). Compared with the Fe76.5Cu1Si13.5B9 alloy, the alloy with addition of Nb or Mo, Fe73.5Cu1M3Si13.5B9 (M=Nb, Mo), has a unique crystallization process. The activation energy of crystallization of the alloy with addition of Nb, Fe73.5Cu1Nb3Si13.5B9, during the beginning stage of crystallization is the smallest, it increases with increasing crystallized fraction and then shows a larger value (500 kJ/mol) in the range of crystallized fraction of 25%–90%. The crystallization process of the alloy with addition of Mo, Fe73.5Cu1Mo3Si13.5B9, is similar to that of Fe73.5Cu1Nb3Si13.5B9 alloy, but the increase of activation energy in the alloy with crystallized fraction is smaller.
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