Journal of Phase Equilibria and Diffusion

, Volume 39, Issue 5, pp 490–501 | Cite as

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

  • Bo Yang
  • Zeting Du
  • Cuiping Guo
  • Changrong Li
  • Zhenmin DuEmail author


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.


Fe-Nb-Ta system isothermal section phase diagram phase equilibria 



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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Copyright information

© ASM International 2018

Authors and Affiliations

  • Bo Yang
    • 1
  • Zeting Du
    • 1
  • Cuiping Guo
    • 1
  • Changrong Li
    • 1
  • Zhenmin Du
    • 1
    Email author
  1. 1.Department of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingPeople’s Republic of China

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