Abstract
The amorphous alloys, Fe80Si20, Fe78Si9B13, and Fe4Co67Mo1.5Si16.5B11, were prepared by the spinning method in pure argon. The crystallization behaviors of the three amorphous alloys were researched by in-situ X-ray diffraction (XRD), and the crystallization activation energy was calculated, based on the results of differential scanning calorimetry. The crystallization mechanism of the Fe- and Co-based alloys was analyzed, based on the experimental data. The transformation kinetics was described in terms of Johnson–Mehl–Avrami kinetics, except that the Avrami exponent of the Fe78Si9B13 amorphous alloy annealed at 753 K (480 °C) was 4.12; the obtained values for the overall Avrami exponents of the other three amorphous alloys were below 1, as usually found for the Fe-Si amorphous alloys.
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Acknowledgments
One of the authors (GL) acknowledges the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20131333110019), the Basic Research Project in Hebei Province (Grant No. A2016203382), and the support from the National Science Foundation of China (Grant No. 11544014). PFY acknowledges the Research Program of the College Science & Technology of Hebei Province (Grant No. QN2016167). PKL acknowledges the Department of Energy, Office of Fossil Energy, National Energy Technology Laboratory (Grant Nos. DE-FE-0008855, DE-FE-0011194, and DE-FE-0024054), Messrs. V. Cedro and R. Dunst, program managers. PKL is also grateful for the support from Project No. DE-FE-0011194, Dr. J. Mullen, project manager; the U.S. Army Research Office (Project No. W911NF-13-1-0438), Dr. D.M. Stepp, program manager; and the National Science Foundation (Grant No. CMMI-1100080), Dr. C. Cooper, program director. TE was supported by the Department of Energy, Office of Sciences, Basic Energy Sciences, Materials Science and Engineering Division.
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Manuscript submitted December 29, 2015.
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ZHANG, L.J., YU, P.F., CHENG, H. et al. Crystallization in Fe- and Co-Based Amorphous Alloys Studied by In-Situ X-Ray Diffraction. Metall Mater Trans A 47, 5859–5862 (2016). https://doi.org/10.1007/s11661-016-3761-7
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DOI: https://doi.org/10.1007/s11661-016-3761-7