Non-isothermal Crystallization Kinetics and Magnetic Properties of FeCoNiCrZr Metallic Glass

In the present paper, the non-isothermal crystallization kinetics, crystallization process, and magnetic properties of (Fe0.52Co0.30Ni0.18)73Cr17Zr10 metallic glass were studied by means of differential scanning calorimetry (DSC), Kissinger equation, Ozawa equation, Kempen model, and vibrating sample magnetometer (VSM), respectively. According to the classical nucleation theory, the value of Avrami exponent (n), initially being larger than 4 which implies that phase transformation mechanism is typical for interface-controlled three-dimensional (3-D) growth with increasing nucleation rates, along with the development of crystallization, decreases to 1.5 ∼ 2, which implies that the growth mechanism changes to diffusion-controlled 3-D growth with decreasing nucleation rates; finally, the nucleation rates decrease to zero. Through proper annealing conditions, the saturation magnetization(Ms) values of the annealed sample can reach up to 106.8A m2 kg− 1, the crystallization process of this alloy is amorphous → α-Fe(Co) + amorphous′ → α-Fe(Co) + Cr2Ni3 + Fe3Ni2 + Cr2Zr + unidentified phase.