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The preferential orientation and lattice misfit of the directionally solidified Fe–Al–Ta eutectic composite

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Abstract

Fe–Al intermetallic compound has been paid more attentions recently in many fields such as aeronautic, aerospace, automobile, energy and chemical engineering, and so on. In this paper Fe–Al–Ta eutectic was prepared by a modified Bridgman directional solidification technique, and it is found that microstructure of the Fe–Al–Ta eutectic alloy transforms from the broken-lamellar eutectic to cellular eutectic with the increase of the solidification rate. In the cellular eutectic structure, the fibers are parallel to each other within the same grain, but some fibers are deviated from the original orientation at the grain boundaries. To study the crystallographic orientation relationship (OR) between the two phases, the preferential orientation of the Fe–Al–Ta eutectic alloy at the different solidification rates was studied by Selected Area Electron Diffraction (SAED). Moreover, the lattice misfit between Fe2Ta(Al) Laves phase and Fe(Al,Ta) matrix phase was calculated.

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Acknowledgements

The authors would like to thank the National Natural Science Foundation of China (51201121), Science and Technology Foundation for Selected Overseas Chinese Scholars of Shaanxi Province (2015), International Science and technology cooperation and exchange program of Shaanxi Province (2016KW-055), and Research Project of Shaanxi Engineering Technology Research Center for Wear-resisting Materials (2016NMZX03) for financial support.

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Authors and Affiliations

  1. School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Chunjuan Cui, Pei Wang, Meng Yang, Yagang Wen, Chiqiang Ren & Songyuan Wang

  2. Shaanxi Engineering Technology Research Center for Wear-resisting Materials, Xi’an, 710055, China

    Chunjuan Cui

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  1. Chunjuan Cui
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  2. Pei Wang
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Correspondence to Chunjuan Cui.

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Cui, C., Wang, P., Yang, M. et al. The preferential orientation and lattice misfit of the directionally solidified Fe–Al–Ta eutectic composite. Appl. Phys. A 124, 12 (2018). https://doi.org/10.1007/s00339-017-1421-4

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