Thermodynamic Study of High-Purity TiSi2 Prepared by Directional Solidification

Abstract

The equilibrium segregation coefficient of impurities in materials is the theoretical basis for its purification. This study used the high-temperature chemical equilibration technique to determine the solid solubility and the approximate equilibrium segregation coefficients of Fe, Mn, Al, Cu, and Ni impurities in TiSi₂. The results showed that the solid solubilities of Al, Fe, Mn, Ni, and Cu in TiSi₂ were in the range of 1.0 to 1.5 wt pct, and their equilibrium segregation coefficients were less than 1.