The research of Ti-rich zone on the interface between TiC and aluminum melt and the formation of Ti3Al in rapid solidified Al–Ti–C master alloys

In the present work, the thermodynamic tendency of formation of Ti-rich zone on the interface between TiCx and aluminum melt is calculated and a high titanium concentration can exist in the zone according to the thermodynamic calculation. Rapid solidified Al–5Ti–0.5C master alloy is analyzed by X-ray diffraction (XRD) and transmission electronic microscopy (TEM). The appearance of Ti3Al in the master alloy results from the existence of high-concentration Ti-rich zone.