Structure and Crystallization Behaviour of Amorphous Fe76Tm4B20 Alloy Studied by DSC, SEM and EDS

The Structure and crystallization behavior of amorphous Fe76Tm4B20 alloy are studied using the techniques of Differential Scanning Calorimetry(DSC), Scanning Electron Microscopy(SEM) and Energy Dispersive Spectroscopy(EDS). DSC analysis showed that on heating the sample upto 10000C, a sharp peak was observed at 7910C, indicating a primary crystalline phase appearing in the amorphous matrix. Another sharp peak was observed at 8960C showing further crystallization of the sample. Minor peaks are observed at 8530C and at 9290C. The sample is completely crystallized at 9290C. Thus, in amorphous Fe76Tm4B20 alloy the crystallization is a multi stage process where different crystalline phases grow in the amorphous matrix. SEM patterns showed that as cast sample is amorphous and the sample heated to 10000C was crystallized. EDS patterns showed the presence of crystalline phases in the crystallized sample.