Abstract
Abstract Phase equilibria in the Co–Fe–Ti ternary system were investigated by means of the equilibrated alloy method with X-ray powder diffraction and electron probe microanalysis. No ternary compounds were found. The experimental results indicated the existence of seven two-phase and one three-phase regions at 600°C, five two-phase and two three-phase regions at 800°C, and six two-phase and two three-phase regions at 950°C. The solubility of Co in TiFe2 was determined to be larger than 54 at.% at all investigated temperatures, and the solubilities of Fe in TiCo3 and Ti2Co showed an appreciable increase with increasing temperature. The three-phase equilibrium in the Ti-rich corner at 800°C was revealed to be ((β-Ti) + Ti(Fe, Co) + Ti2Co) rather than ((α-Ti) + Ti(Fe, Co) + Ti2Co) reported in previous investigations. Based on the experimental data obtained in the present work, three isothermal sections at 600, 800 and 950°C were established.
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