Thermodynamic simulation of the Ni—Ru binary-system phase diagram

Calculations have given a consistent set of interaction constants for all the phases of variable composition in the Ni−Ru binary system, and also a set of stability constants for the ruthenium phases in its stable and virtual modifications. These data have been used to calculated a phase diagram for the Ni−Ru system. It is found that there is satisfactory agreement between the calculated phase diagram and the experimental one when one uses the subregular solution approximation for the solid and liquid phases of variable composition. Institute for Problems of Materials Science, Ukraine National Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 5–6(407), pp. 48–55, May–June, 1999.     

Reactions in the crystallization of Ti-Ni-SC system alloys in the TiNi - Ni - ScNi region

The Ti-Ni-Sc diagram has been examined for nickel contents of 50–100 at. %. The alloys were prepared by arc melting and were examined by metallography, differential thermal analysis, and microprobe analysis. There are four nonvariant equilibria: two incongruent ones and two congruent ones. The minimum melting point of 980°C occurs in alloys with the base composition 3> + 2> + , which form a eutectic.Materials Science Institute, Ukrainian National Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 7–8, pp. 134–140, July–August, 1996.