Isothermal section at 1100 °c of the Fe-Ni-Ta system

Chengying Tang, Minmin Tong, Honghui Xu, Yong Du, Joonho Lee, Qingrong Yao, Yuehui He, Huaiying Zhou

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3 Citations (Scopus)


The isothermal section of the Fe-Ni-Ta system at 1100 °C was constructed using 6 diffusion couples and 10 alloys, the compositions of which were selected on the basis of the experimental results of the (Fe-Ni alloy)/Ta diffusion couples. The samples were examined by means of optical microscopy, scanning electron microscopy, and electron probe microanalysis. Experimental results showed no existence of ternary compounds at 1100 °C. The following five three-phase equilibria were observed: (1) (Ta) + Ta2Ni + Ta(Fe, Ni), (2) Fe2Ta + Ta (Fe, Ni) + TaNi2, (3) Fe2Ta + TaNi2 + TaNi3, (4) Fe2Ta + TaNi3 + (Fe, Ni), (5) TaNi3 + TaNi8 + (Fe, Ni). The compounds FeTa and NiTa formed continuous solid solution. The solubility of Fe in TaNi2 and TaNi3 was determined to be 18 and 7.8 at.%, respectively, while the solubility of Ni in Fe2Ta was estimated to be 40 at.%.

Original languageEnglish
Pages (from-to)181-185
Number of pages5
JournalJournal of Alloys and Compounds
Issue number1
Publication statusPublished - 2010 Aug 31

Bibliographical note

Funding Information:
The financial support from the National Natural Science Foundation of China ( 50861006 , 50971049 ), the Natural Science Foundation of Guangxi ( 0991002Z ) and the Open Project Program of State Key Lab of Powder Metallurgy ( 2008112039 ) are greatly acknowledged.


  • Diffusion
  • Electron microprobe
  • Phase diagrams
  • Scanning electron microscopy
  • Ternary alloy systems

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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