Phase Equilibria of the Co-Cu-Mo System at 900 and 1100°C

The phase equilibria of the Co-Cu-Mo ternary system at 900 and 1100 degrees C have been studied by using x-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS). Three and five three-phase regions have been confirmed in the system at 900 and 1100 degrees C, respectively. No ternary compound has been found in these two isothermal sections. At 900 degrees C, the maximum solubilities of Co and Cu in the phase are 56.5 and 4.4at.%, respectively. As the temperature rises to 1100 degrees C, their solubilities decrease slightly. Moreover, with the temperature increases from 900 to 1100 degrees C, in the Co phase, the solubility of Mo increases from 6.5 to 11.9at.% and the solubility of Cu increases from 8.3 to 12.1at.%.