Crystallization Process of Fe75Co5Zr10B10 Amorphous Alloy
Y.M. Sun, B. Zuo, D. Wang, X.C. Meng, J. Liu, L.L. Wang and Z. Hua
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, Jilin, China
Received: December 21, 2012; In final form: May 5, 2013
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Fe75Co5Zr10B10 amorphous alloy prepared by melt-spinning was annealed at various temperatures. The thermal property and microstructures were investigated by differential thermal analysis, X-ray diffraction, and transmission electron microscopy. The crystallization process of Fe75Co5Zr10B10 amorphous alloy is complex. The α-Fe phase precipitates from the amorphous matrix in the initial stage of crystallization. The α-Mn type (χ) phase precipitates at 570°C, but transforms to α-Fe phase and the Laves C14(λ) phase at higher temperature. In the final stage of crystallization, Fe3Zr, Fe2Zr, and unknown phases are observed and the λ-phase disappears. The α-Fe phase preferentially nucleates after annealing at 530°C for 10 min and the χ-phase preferentially nucleates after annealing at 600°C for 10 min. The nucleation barrier of χ-phase is larger than that of α-Fe phase. The local structure of χ-phase is more similar to amorphous phase.

DOI: 10.12693/APhysPolA.124.685
PACS numbers: 61.43.Dq, 64.60.My