Fe-Nb-Ni (Iron-Niobium-Nickel)

The phase diagrams of iron-niobium-nickel (Fe-Nb-Ni) system were studied. The Fe-Nb phase diagram depicted two intermediate phases that included Fe 2Nb and Fe 7Nb 6. The Nb-Ni phase diagram had the intermediate phases such as Nb 7Ni 6, NbNi 3 and NbNi 8. The liquid originating on the Ni-Nb side had split into two parts and was separated by a three-phase field of (NbNi 3 + Fe 2Nb + L) at 1250 °C. The results showed that no liquid phase were present in the system at 1000 °C and solid-state transition reactions occurred below 950 °C, to yield the phase distribution observed at 800 and 450 °C.