Influence of heat treatment on high frequency soft magnetic properties of Finemet amorphous alloy

摘要

In order to study high-frequency soft magnetic properties of Finemet amorphous alloy,the microstructural change and nanocrystallization under different heat treatment conditions were investigated by XRD and TEM.The crystallite size of α-Fe was calculated from the XRD pattern using the Scherrer formula,while the high frequency magnetic properties were measured at room temperature by TPS-200SA exchange tester.The results of XRD and TEM indicate that the nanocrystallization occurs at 500 °C.When the annealing temperature increases to 560 °C,the amorphous alloy becomes totally nanocrystallized and the crystallites distribute homogeneously,thus an excellent combination of soft magnetic properties is obtained.