Non-isothermal kinetic analysis of nano-crystallization process in (Fe41Co7Cr15Mo14Y2C15)94B6 amorphous alloy

作者：Rezaei Shahreza P; Seifoddini A; Hasani S

来源：Thermochimica Acta, 2017, 652: 119-125.

DOI：10.1016/j.tca.2017.03.017

• Bulk metallic glasses (BMGs)
• Nanocrystal
• Crystallization kinetic
• Non-isothermal kinetics
• IKP method

In this work, non-isothermal kinetic analysis of the crystallization process was performed on a (Fe41Co7Cr15Mo14Y2C15)(94B6) amorphous alloy heated by DSC at various heating rates (5, 10, and 20 degrees C/min) up to 1200 degrees C. The research findings revealed that three crystalline phases including Fe-23 (B, C)(6), Fe3Mo3C, and Mo3Co3C were formed during the crystallization process; furthermore, the presence of nano-crystalline grains was confirmed by FE-SEM. Two isoconversional methods including Starink, and Friedman (FR) were used to determine the variation of activation energy with a (E-alpha). Moreover, the invariant kinetic parameters (IICP) method and free model were used to calculate the empirical kinetic triplets (E, A, and g(alpha)). The best reaction models, chosen by fitting methods to describe the mechanism of four crystallization steps were A2, A3/2, A2, and A4, respectively.

• 出版日期2017-6-10