期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：10
页码：18072
DOI：10.15680/IJIRSET.2016.0510116
出版社：S&S Publications
摘要：Differential Scanning Calorimetry (DSC) experimental data under non-isothermal conditions for metglas2605S3A (Fe77B16Si5Cr2) metallic glass ribbons are reported and discussed. The DSC thermograms at 2, 4, 6, 8 and 10K/min heating rates showed two step crystallization processes and are interpreted in terms of different models(Kissinger, Ozawa, Bosewell, Augis & Bennett, Gao & Wang and Matusita & Sakka) developed for non-isothermalconditions. From the heating rate dependence of the on-set temperature (To) and the crystallization peak temperature(Tp), the kinetic triplet (activation energy of crystallization (Ec), Avrami exponent (n) and the frequency factor (A) weredetermined. The evaluated values of the Avrami exponent, n (for peak I is 3.8 and for peak II is 4.2) which indicatethree dimensional growths, which is responsible for the amorphous-crystalline transformation. The determined Ec forpeak I is 425 ± 1.7 kJ/mol and for peak II is 384 ± 1.9 kJ/mol, respectively.
关键词：Crystallization kinetics; Activation energy of crystallization; Non isothermal methods; Metallic glasses.
