Experimental determination of phase equilibria in the Co–Ti–Mo ternary system

The phase equilibria in the Co–Ti–Mo ternary system were investigated by means of optical microscopy (OM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD). Five isothermal sections of the Co–Ti–Mo ternary system at 900 °C, 1000 °C, 1100 °C, 1200 °C and 1300 °C were experimentally established and no ternary compound was found in this system. The Co3Mo (D019) phase stabilized by the addition of Ti was known. In addition, the single-phase region of the Co2Ti (h) phase was identified in the isothermal section at 1300 °C. The newly determined phase equilibria in this system will provide important information support for the development of Co-based alloys.