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Isothermal Sections of the Ni-Cr-Ta Ternary System at 1200 °C and 1300 °C

College of Materials and Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, China
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
Institute of Materials Genome and Big Data, Harbin Institute of Technology, Shenzhen 518055, China
Authors to whom correspondence should be addressed.
Metals 2019, 9(7), 770;
Received: 14 June 2019 / Revised: 4 July 2019 / Accepted: 5 July 2019 / Published: 10 July 2019
PDF [16401 KB, uploaded 10 July 2019]


Two isothermal sections of the Ni-Cr-Ta ternary system at 1200 °C and 1300 °C have been determined by using electron probe microanalysis, energy dispersive spectroscopy and differential scanning calorimeter. A Laves phase (Ni, Cr)2Ta(HT)(C14 structure) with large solid solubility stabilized by the Ni addition was determined in both two isothermal sections. The composition range of this phase was about 25.8–66.0 at.% Cr, 2.5-44.3 at.% Ni, and 24.0-40.0 at.% Ta at 1200 °C, which increased with raising temperature. The melting point of the Ni-Cr alloys decreased with the addition of Ta. No ternary compound was found in both these two isothermal sections. The present work could be significant for practical application of nickel-based alloys and future thermodynamics assessment of the Ni-Cr-Ta ternary system. View Full-Text
Keywords: Ni–Cr–Ta system; isothermal section; electron probe microanalysis Ni–Cr–Ta system; isothermal section; electron probe microanalysis

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Wang, C.; Liang, Y.; Yang, S.; Yang, M.; Li, L.; Han, J.; Lu, Y.; Liu, X. Isothermal Sections of the Ni-Cr-Ta Ternary System at 1200 °C and 1300 °C. Metals 2019, 9, 770.

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