The research of Ti-rich zone on the interface between TiC_x and aluminum melt and the formation of Ti_3Al in rapid solidified Al-Ti-C master alloys

摘要

In the present work, the thermodynamic tendency of formation of Ti-rich zone on the interface between TiC_x 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 Ti_3Al in the master alloy results from the existence of high-concentration Ti-rich zone.