Determination of isothermal section of Ni-Re-Hf ternary system at 1173 K

Abstract

The phase equilibriua in the Ni-Re-Hf ternary system at 1173K were investigated by means of diffusion triple technique and electron microprobe analysis (EMPA). The experimental results indicate that two ternary intermetallics (α and β) and five binary intermetallics (Ni₃Hf, Ni₁₀Hf₇, Ni₁₁Hf₉, NiHf and NiHf₂) exist in the Ni-Re-Hf system at 1 173 K. A tentative isothermal section of this system at 1 173 K was constructed on the basis of experimental results. The isothermal section consists of nine three-phase regions, five of which are supported by the experimental data.

Keywords

Ni-Re-Hf ternary system / diffusion triple / diffusion layers / phase equilibrium / isothermal section

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