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Abstract
Abstract The phase equilibria of the Ni–Nb–V ternary system at 1 000 °C and 1 200 °C were established using electron probe microanalysis, X-ray diffraction and differential scanning calorimetry. The results of the investigation revealed that: (1) The Nb solubility in (Ni) and σ′ phases was less than 10 at.%; (2) A ternary compound τ (NiNbV) was confirmed, in which V had a large solubility; (3) A new liquid region was evident at 1 200 °C, but was absent at 1 000 °C; (4) The lattice constants of Ni3Nb and Ni6Nb7 phase decreased with increase in V content in the Ni3Nb and Ni6Nb7. The phase equilibria of the Ni–Nb–V ternary system will contribute to its thermodynamic assessment.
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