An experimental study and thermodynamic evaluation of the Ti-poor part of the Ni−Ti−Ru ternary system.

The isothermal section at 900 °C of the Ti-poor part of the Ni−Ti−Ru ternary system was measured experimentally, combined with SEM-EDS, XRD, TEM and DSC techniques. Four three-phase equilibria regions were confirmed at 900 °C isothermal section and a ternary compound τ with Face-centered-cubic structure can existed stably. The isothermal section at 900 °C measured in this study and the experimental data from our previous work were adopted in the present optimization. The calculated Ni−Ti−Ru ternary system was summarily presented in the form of isothermal sections, liquids projection and reaction scheme, with appropriate comparisons with available experimental data. • The 900 °C isothermal section of the Ni−Ti−Ru ternary system in Ti-poor part was investigated. • The ternary compound τ was identified as FCC structure. The lattice parameters of the τ are a = b = c = 0.3715 nm. • A new set of self-consistent thermodynamic parameters for the Ni−Ti−Ru ternary system was obtained. [ABSTRACT FROM AUTHOR]