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Experimental Investigation of Phase Equilibria in the Fe-Nb-Ta System

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Abstract

The phase equilibria in the Fe-Nb-Ta ternary system at 1200, 1100 and 1000 °C were experimentally investigated. The microstructure of each sample was observed using scanning electron microscopy, and phase compositions were measured by energy dispersive spectrometry. The constituent phases of typical samples were analyzed with x-ray diffraction. The experimental results indicated that the continuous solid solution phases, Fe2(Nb,Ta) and Fe7(Nb,Ta)6, were formed between Fe2Nb and Fe2Ta and Fe7Nb6 and Fe7Ta6, respectively, and no ternary compounds were found in this system in these isothermal sections. Based on the experimental phase equilibria data obtained in the present work, three isothermal sections at 1200, 1100 and 1000 °C were constructed.

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Acknowledgment

The work was supported by the National Key R&D Program of China (Grant No. 2017YFB0703001) and the National Natural Science Foundation of China (NSFC) (Grant No. 51671025)

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China

    Bo Yang, Zeting Du, Cuiping Guo, Changrong Li & Zhenmin Du

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  1. Bo Yang
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  2. Zeting Du
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  3. Cuiping Guo
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  4. Changrong Li
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  5. Zhenmin Du
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Correspondence to Zhenmin Du.

Additional information

This invited article is part of a special issue of the Journal of Phase Equilibria and Diffusion in honor of Prof. Zhanpeng Jin’s 80th birthday. The special issue was organized by Prof. Ji-Cheng (JC) Zhao, The Ohio State University; Dr. Qing Chen, Thermo-Calc Software AB; and Prof. Yong Du, Central South University.

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Yang, B., Du, Z., Guo, C. et al. Experimental Investigation of Phase Equilibria in the Fe-Nb-Ta System. J. Phase Equilib. Diffus. 39, 490–501 (2018). https://doi.org/10.1007/s11669-018-0658-8

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  • DOI: https://doi.org/10.1007/s11669-018-0658-8

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