Study of crystallization behavior and kinetics of magnetic FeCoCrNiZr high entropy amorphous alloy

A new magnetic Fe36Co22Cr17Ni15Zr10 high entropy amorphous alloy has been prepared and its crystallization behavior and kinetics been studied. The results show that, under non-isothermal conditions, the crystallization activation energy E-x was calculated by the Kissinger equation, which yield 373 kJmol(-1). Relation plot of E-x vs crystallization volume fraction(x) manifests the non-isothermal crystallization process is from difficult to easy. On the other hand, base on Arrhenius relation, the crystallization activation energy E-c under isothermal conditions was calculated to be 370 kJmol(-1). Relation plot of E-c vs x manifests the isothermal crystallization process is from easy to difficult. The isothermal kinetics was modeled by Johnson-Mehl-Avrami(JMA) equation, as the isothermal annealing temperature increases, the nucleus growth mechanism from diffusion-controlled 3-D growth convert into interface-controlled 3-D growth. Though proper heat treatment, the saturation magnetization M-s of this alloy can reach up to 106.8A.m(2)kg(-1), it will become promising functional materials in the future.