Crystallization kinetics of Fe based amorphous alloy

International Conference on Materials Science and Technology 2012

Rao, T. Shanker^1 ; Rao, T. Lilly Shanker^2

Physics Department, Narmada College of Science and Commerce, Zadeshwar, Bharuch(Gujarat)

392011, India^1

Electronics Department, Narmada College of Science and Commerce, Zadeshwar, Bharuch(Gujarat)

392011, India^2

关键词: Activation energy of crystallization;    Crystallization peak temperatures;    Fe-based amorphous alloy;    Frequency factors;    Metallic glass ribbons;    Non-isothermal condition;    Onset temperature;    Two-step crystallization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/73/1/012048/pdf
DOI  :  10.1088/1757-899X/73/1/012048

来源: IOP

【 摘 要 】

Differential Scanning Calorimetry(DSC) experimental data under non-isothermal conditions for Fe based Metglas 2605SA1 (wt% Fe=85-95, Si=5-10, B=1-5) metallic glass ribbons are reported and discussed. The DSC Scans performed at different heating rates showed two step crystallization processes and are interpreted in terms of different models like Kissinger, Ozawa, Boswell, Augis & Bennett and Gao & Wang. From the heating rate dependence of the onset temperature (To) and the crystallization peak temperature (Tp), the kinetic triplet, activation energy of crystallization (E), Avrami exponent (n) and the frequency factor (A) are determined. The determined E for peak I is 354.5 ± 2.5 kJ/mol and for the peak II is 348.2 ± 2.2 kJ/mol, respectively. The frequency factor for peak I is 1.1 × 1023sec-1and for peak II is 6.1 × 1020sec-1.